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Fencer Vulns
high 7.8

CVE-2026-46227 json

sctp: revalidate list cursor after sctp_sendmsg_to_asoc() in SCTP_SENDALL

published 2026-05-28 5 mo ago modified 2026-10-19 20 d ago also EUVD-2026-32854

cvss
7.8
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
0.1%
EPSS 0.1% chance of exploitation in 30 days, percentile 1%
public exploits
0
none known

Summary

In the Linux kernel, the following vulnerability has been resolved:

sctp: revalidate list cursor after sctp_sendmsg_to_asoc() in SCTP_SENDALL

The SCTP_SENDALL path in sctp_sendmsg() iterates ep->asocs with list_for_each_entry_safe(), which caches the next entry in @tmp before the loop body runs. The body calls sctp_sendmsg_to_asoc(), which may drop the socket lock inside sctp_wait_for_sndbuf().

While the lock is dropped, another thread can SCTP_SOCKOPT_PEELOFF the association cached in @tmp, migrating it to a new endpoint via sctp_sock_migrate() (list_del_init() + list_add_tail() to newep->asocs), and optionally close the new socket which frees the association via kfree_rcu(). The cached @tmp can also be freed by a network ABORT for that association, processed in softirq while the lock is dropped.

sctp_wait_for_sndbuf() revalidates @asoc (the current entry) on re-lock via the "sk != asoc->base.sk" and "asoc->base.dead" checks, but nothing revalidates @tmp. After a successful return, the iterator advances to the stale @tmp, yielding either a use-after-free (if the peeled socket was closed) or a list-walk onto the new endpoint's list head (type confusion of &newep->asocs as a struct sctp_association *).

Both are reachable from CapEff=0; the type-confusion path gives controlled indirect call via the outqueue.sched->init_sid pointer.

Fix by re-deriving @tmp from @asoc after sctp_sendmsg_to_asoc() returns. @asoc is known to still be on ep->asocs at that point: the only callers that list_del an association from ep->asocs are sctp_association_free() (which sets asoc->base.dead) and sctp_assoc_migrate() (which changes asoc->base.sk), and sctp_wait_for_sndbuf() checks both under the lock before any successful return; a tripped check propagates as err < 0 and the loop bails before the re-derive.

The SCTP_ABORT path in sctp_sendmsg_check_sflags() returns 0 and the loop hits 'continue' before sctp_sendmsg_to_asoc() is ever called, so the @tmp cached by list_for_each_entry_safe() still covers the lock-held free that ba59fb027307 ("sctp: walk the list of asoc safely") was added for.

Patch / fix

  • Linux Linux 5.10.258, 5.15.209, 6.1.175, 6.6.140, 6.12.90, 6.18.32, 7.0.9, 7.1
  • Red Hat Red Hat Enterprise Linux 10 0:6.12.0-211.32.1.el10_2
  • Red Hat Red Hat Enterprise Linux 10.0 Extended Update Support 0:6.12.0-55.82.1.el10_0
  • Red Hat Red Hat Enterprise Linux 8 0:4.18.0-553.140.1.el8_10, 0:4.18.0-553.140.1.rt7.481.el8_10
  • Red Hat Red Hat Enterprise Linux 8.4 Advanced Mission Critical Update Support 0:4.18.0-305.194.1.el8_4
  • Red Hat Red Hat Enterprise Linux 8.4 Extended Update Support Long-Life Add-On 0:4.18.0-305.194.1.el8_4
  • Red Hat Red Hat Enterprise Linux 8.6 Advanced Mission Critical Update Support 0:4.18.0-372.198.1.el8_6
  • Red Hat Red Hat Enterprise Linux 8.6 Extended Update Support Long-Life Add-On 0:4.18.0-372.198.1.el8_6
  • Red Hat Red Hat Enterprise Linux 8.8 Telecommunications Update Service 0:4.18.0-477.147.1.el8_8
  • Red Hat Red Hat Enterprise Linux 8.8 Update Services for SAP Solutions 0:4.18.0-477.147.1.el8_8
  • Red Hat Red Hat Enterprise Linux 9 0:5.14.0-687.22.1.el9_8
  • Red Hat Red Hat Enterprise Linux 9.2 Update Services for SAP Solutions 0:5.14.0-284.176.1.el9_2, 0:5.14.0-284.176.1.rt14.461.el9_2
  • Red Hat Red Hat Enterprise Linux 9.4 Update Services for SAP Solutions 0:5.14.0-427.132.1.el9_4
  • Red Hat Red Hat Enterprise Linux 9.6 Extended Update Support 0:5.14.0-570.125.1.el9_6
  • linux Debian 12 6.1.176-1
  • linux Debian 13 6.12.90-1
  • linux Debian 14 7.0.9-1

debian advisories DEBIAN-CVE-2026-46227

  • linux Ubuntu 22.04 LTS 5.15.0-186.196
  • linux Ubuntu 24.04 LTS 6.8.0-136.136
  • linux Ubuntu 26.04 LTS 7.0.0-28.28
  • linux-aws Ubuntu 22.04 LTS 5.15.0-1112.119
  • linux-aws Ubuntu 24.04 LTS 6.8.0-1061.64
  • linux-aws Ubuntu 26.04 LTS 7.0.0-1009.9
  • linux-gcp Ubuntu 22.04 LTS 5.15.0-1112.122
  • linux-gcp Ubuntu 24.04 LTS 6.8.0-1064.72

ubuntu advisories UBUNTU-CVE-2026-46227

Ubuntu security data © Canonical Ltd., from https://github.com/canonical/ubuntu-security-notices via OSV; changed: normalised to fixed package versions per release. CC BY-SA 4.0

  • kpatch-patch-5_14_0-687_10_1 RHEL 9 1-7.el9_8
  • kpatch-patch-4_18_0-553_85_1 RHEL 8 1-12.el8_10
  • kpatch-patch-4_18_0-553_53_1 RHEL 8 1-17.el8_10
  • kpatch-patch-4_18_0-553_72_1 RHEL 8 1-14.el8_10
  • kpatch-patch-4_18_0-553_109_1 RHEL 8 1-10.el8_10
  • kpatch-patch-4_18_0-553_125_1 RHEL 8 1-7.el8_10
  • kpatch-patch-6_12_0-211_16_1 RHEL 10.2 1-7.el10_2
  • kernel RHEL 10.2 6.12.0-211.32.1.el10_2

red hat advisories RHSA-2026:59148RHSA-2026:59149RHSA-2026:59147RHSA-2026:59145RHSA-2026:59146RHSA-2026:59143

  • kernel-livepatch-MICRO-6-0-RT_Update_13 Linux Micro 6.1, Linux Micro 6.0 9-1.1
  • kernel-syms SLES 16.0, Linux Micro Extras 6.2, SLES for SAP applications 16.0 6.12.0-160000.36.1
  • kernel-obs-build Linux Micro Extras 6.2 6.12.0-160000.36.1
  • kernel-rt Linux Micro 6.2 6.12.0-160000.36.1
  • kernel-64kb SLES 16.0, Linux Micro 6.2, SLES for SAP applications 16.0 6.12.0-160000.36.1
  • kernel-source SLES 16.0, Linux Micro 6.2, SLES for SAP applications 16.0 6.12.0-160000.36.1
  • kernel-default SLES 16.0, SLE High Availability Extension 16.0, Linux Micro 6.2 +1 more 6.12.0-160000.36.1
  • kernel-default-base SLES 16.0, Linux Micro 6.2, SLES for SAP applications 16.0 6.12.0-160000.36.1.160000.2.17

suse advisories SUSE-SU-2026:22689-1SUSE-SU-2026:22711-1SUSE-SU-2026:3369-1SUSE-SU-2026:22742-1SUSE-SU-2026:22769-1SUSE-SU-2026:22835-1

  • kernel-rt openSUSE Leap 16.0 6.12.0-160000.36.1
  • dtb-aarch64 openSUSE Leap 16.0 6.12.0-160000.36.1
  • kernel-64kb openSUSE Leap 16.0 6.12.0-160000.36.1
  • kernel-syms openSUSE Leap 16.0 6.12.0-160000.36.1
  • kernel-azure openSUSE Leap 16.0 6.12.0-160000.36.1
  • kernel-obs-qa openSUSE Leap 16.0 6.12.0-160000.36.1
  • kernel-source openSUSE Leap 16.0 6.12.0-160000.36.1
  • kernel-default openSUSE Leap 16.0 6.12.0-160000.36.1

opensuse advisories openSUSE-SU-2026:21388-1openSUSE-SU-2026:10954-1

  • kernel AlmaLinux 10 6.12.0-211.32.1.el10_2
  • rv AlmaLinux 10 6.12.0-211.32.1.el10_2
  • perf AlmaLinux 10 6.12.0-211.32.1.el10_2
  • rtla AlmaLinux 10 6.12.0-211.32.1.el10_2
  • libperf AlmaLinux 10 6.12.0-211.32.1.el10_2
  • kernel-rt AlmaLinux 10 6.12.0-211.32.1.el10_2
  • kernel-64k AlmaLinux 10 6.12.0-211.32.1.el10_2
  • kernel-core AlmaLinux 10 6.12.0-211.32.1.el10_2

almalinux advisories ALSA-2026:36956ALSA-2026:36348ALSA-2026:36349ALSA-2026:36018

  • kernel Rocky Linux 10 6.12.0-211.32.1.el10_2
  • kernel Rocky Linux 9 5.14.0-687.22.1.el9_8

rocky linux advisories RLSA-2026:36956RLSA-2026:36018

  • kernel Azure Linux 3.0 6.6.141.1-1

azure linux advisories AZL-88899

Azure Linux vulnerability data, Copyright (c) Microsoft Corporation, from https://github.com/microsoft/AzureLinuxVulnerabilityData via OSV, under the MIT licence; changed: normalised to fixed package versions per release. MIT

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2026-46227 updated cvss 7.0

kernel: sctp: revalidate list cursor after sctp_sendmsg_to_asoc() in SCTP_SENDALL

  • Red Hat CodeReady Linux Builder EUS (v.9.6) libperf 5.14.0-570.125.1.el9_6, kernel-debuginfo-common-s390x 5.14.0-570.125.1.el9_6, kernel-debuginfo-common-x86_64 5.14.0-570.125.1.el9_6, kernel-debuginfo-common-aarch64 5.14.0-570.125.1.el9_6, kernel-debuginfo-common-ppc64le 5.14.0-570.125.1.el9_6
    fixed: vendor fix “To mitigate this issue, prevent module sctp from being loaded. Please see https://access.redhat.com/solutions/41278 for how to blacklist a kernel module to prevent it from loading automatically.” RHSA-2026:34094
  • Red Hat Enterprise Linux AppStream (v. 9) rv 5.14.0-687.22.1.el9_8, perf 5.14.0-687.22.1.el9_8, rtla 5.14.0-687.22.1.el9_8, python3-perf 5.14.0-687.22.1.el9_8, kernel-devel-matched 5.14.0-687.22.1.el9_8, kernel-64k-devel-matched 5.14.0-687.22.1.el9_8, +7 more
    fixed: vendor fix “To mitigate this issue, prevent module sctp from being loaded. Please see https://access.redhat.com/solutions/41278 for how to blacklist a kernel module to prevent it from loading automatically.” RHSA-2026:36018
  • Red Hat Enterprise Linux AppStream (v. 10) rv 6.12.0-211.32.1.el10_2, perf 6.12.0-211.32.1.el10_2, rtla 6.12.0-211.32.1.el10_2, python3-perf 6.12.0-211.32.1.el10_2, kernel-devel-matched 6.12.0-211.32.1.el10_2, kernel-64k-devel-matched 6.12.0-211.32.1.el10_2, +7 more
    fixed: vendor fix “To mitigate this issue, prevent module sctp from being loaded. Please see https://access.redhat.com/solutions/41278 for how to blacklist a kernel module to prevent it from loading automatically.” RHSA-2026:36956
  • Red Hat Enterprise Linux AppStream E4S (v.9.2) perf 5.14.0-284.176.1.el9_2, rtla 5.14.0-284.176.1.el9_2, kernel-devel-matched 5.14.0-284.176.1.el9_2, kernel-64k-devel-matched 5.14.0-284.176.1.el9_2, kernel-debug-devel-matched 5.14.0-284.176.1.el9_2, kernel-debuginfo-common-s390x 5.14.0-284.176.1.el9_2, +5 more
    fixed: vendor fix “To mitigate this issue, prevent module sctp from being loaded. Please see https://access.redhat.com/solutions/41278 for how to blacklist a kernel module to prevent it from loading automatically.” RHSA-2026:26515
  • Red Hat Enterprise Linux AppStream E4S (v.9.4) rv 5.14.0-427.132.1.el9_4, perf 5.14.0-427.132.1.el9_4, rtla 5.14.0-427.132.1.el9_4, kernel-devel-matched 5.14.0-427.132.1.el9_4, kernel-64k-devel-matched 5.14.0-427.132.1.el9_4, kernel-debug-devel-matched 5.14.0-427.132.1.el9_4, +6 more
    fixed: vendor fix “To mitigate this issue, prevent module sctp from being loaded. Please see https://access.redhat.com/solutions/41278 for how to blacklist a kernel module to prevent it from loading automatically.” RHSA-2026:27735
  • Red Hat Enterprise Linux AppStream EUS (v. 10.0) rv 6.12.0-55.82.1.el10_0, perf 6.12.0-55.82.1.el10_0, rtla 6.12.0-55.82.1.el10_0, python3-perf 6.12.0-55.82.1.el10_0, kernel-devel-matched 6.12.0-55.82.1.el10_0, kernel-64k-devel-matched 6.12.0-55.82.1.el10_0, +7 more
    fixed: vendor fix “To mitigate this issue, prevent module sctp from being loaded. Please see https://access.redhat.com/solutions/41278 for how to blacklist a kernel module to prevent it from loading automatically.” RHSA-2026:27731
  • Red Hat Enterprise Linux AppStream EUS (v.9.6) rv 5.14.0-570.125.1.el9_6, perf 5.14.0-570.125.1.el9_6, rtla 5.14.0-570.125.1.el9_6, python3-perf 5.14.0-570.125.1.el9_6, kernel-devel-matched 5.14.0-570.125.1.el9_6, kernel-64k-devel-matched 5.14.0-570.125.1.el9_6, +7 more
    fixed: vendor fix “To mitigate this issue, prevent module sctp from being loaded. Please see https://access.redhat.com/solutions/41278 for how to blacklist a kernel module to prevent it from loading automatically.” RHSA-2026:34094
  • Red Hat Enterprise Linux BaseOS (v. 8) perf 4.18.0-553.140.1.el8_10, kernel 4.18.0-553.140.1.el8_10, bpftool 4.18.0-553.140.1.el8_10, kernel-core 4.18.0-553.140.1.el8_10, kernel-tools 4.18.0-553.140.1.el8_10, python3-perf 4.18.0-553.140.1.el8_10, +20 more
    fixed: vendor fix “To mitigate this issue, prevent module sctp from being loaded. Please see https://access.redhat.com/solutions/41278 for how to blacklist a kernel module to prevent it from loading automatically.” RHSA-2026:36349
show 31 more
  • Red Hat Enterprise Linux BaseOS (v. 9) kernel 5.14.0-687.22.1.el9_8, kernel-64k 5.14.0-687.22.1.el9_8, kernel-core 5.14.0-687.22.1.el9_8, kernel-tools 5.14.0-687.22.1.el9_8, kernel-modules 5.14.0-687.22.1.el9_8, kernel-64k-core 5.14.0-687.22.1.el9_8, +28 more
    fixed: vendor fix “To mitigate this issue, prevent module sctp from being loaded. Please see https://access.redhat.com/solutions/41278 for how to blacklist a kernel module to prevent it from loading automatically.” RHSA-2026:36018
  • Red Hat Enterprise Linux BaseOS (v. 10) kernel 6.12.0-211.32.1.el10_2, kernel-64k 6.12.0-211.32.1.el10_2, kernel-core 6.12.0-211.32.1.el10_2, kernel-tools 6.12.0-211.32.1.el10_2, kernel-modules 6.12.0-211.32.1.el10_2, kernel-64k-core 6.12.0-211.32.1.el10_2, +29 more
    fixed: vendor fix “To mitigate this issue, prevent module sctp from being loaded. Please see https://access.redhat.com/solutions/41278 for how to blacklist a kernel module to prevent it from loading automatically.” RHSA-2026:36956
  • Red Hat Enterprise Linux BaseOS AUS (v.8.4) perf 4.18.0-305.194.1.el8_4, kernel 4.18.0-305.194.1.el8_4, bpftool 4.18.0-305.194.1.el8_4, kernel-core 4.18.0-305.194.1.el8_4, kernel-tools 4.18.0-305.194.1.el8_4, python3-perf 4.18.0-305.194.1.el8_4, +8 more
    fixed: vendor fix “To mitigate this issue, prevent module sctp from being loaded. Please see https://access.redhat.com/solutions/41278 for how to blacklist a kernel module to prevent it from loading automatically.” RHSA-2026:26535
  • Red Hat Enterprise Linux BaseOS AUS (v.8.6) perf 4.18.0-372.198.1.el8_6, kernel 4.18.0-372.198.1.el8_6, bpftool 4.18.0-372.198.1.el8_6, kernel-core 4.18.0-372.198.1.el8_6, kernel-tools 4.18.0-372.198.1.el8_6, python3-perf 4.18.0-372.198.1.el8_6, +8 more
    fixed: vendor fix “To mitigate this issue, prevent module sctp from being loaded. Please see https://access.redhat.com/solutions/41278 for how to blacklist a kernel module to prevent it from loading automatically.” RHSA-2026:33899
  • Red Hat Enterprise Linux BaseOS E4S (v.8.8) perf 4.18.0-477.147.1.el8_8, kernel 4.18.0-477.147.1.el8_8, bpftool 4.18.0-477.147.1.el8_8, kernel-core 4.18.0-477.147.1.el8_8, kernel-tools 4.18.0-477.147.1.el8_8, python3-perf 4.18.0-477.147.1.el8_8, +14 more
    fixed: vendor fix “To mitigate this issue, prevent module sctp from being loaded. Please see https://access.redhat.com/solutions/41278 for how to blacklist a kernel module to prevent it from loading automatically.” RHSA-2026:26563
  • Red Hat Enterprise Linux BaseOS E4S (v.9.2) bpftool 7.0.0-284.176.1.el9_2, kernel 5.14.0-284.176.1.el9_2, kernel-64k 5.14.0-284.176.1.el9_2, kernel-core 5.14.0-284.176.1.el9_2, kernel-tools 5.14.0-284.176.1.el9_2, python3-perf 5.14.0-284.176.1.el9_2, +33 more
    fixed: vendor fix “To mitigate this issue, prevent module sctp from being loaded. Please see https://access.redhat.com/solutions/41278 for how to blacklist a kernel module to prevent it from loading automatically.” RHSA-2026:26515
  • Red Hat Enterprise Linux BaseOS E4S (v.9.4) bpftool 7.3.0-427.132.1.el9_4, kernel 5.14.0-427.132.1.el9_4, kernel-64k 5.14.0-427.132.1.el9_4, kernel-core 5.14.0-427.132.1.el9_4, kernel-tools 5.14.0-427.132.1.el9_4, python3-perf 5.14.0-427.132.1.el9_4, +33 more
    fixed: vendor fix “To mitigate this issue, prevent module sctp from being loaded. Please see https://access.redhat.com/solutions/41278 for how to blacklist a kernel module to prevent it from loading automatically.” RHSA-2026:27735
  • Red Hat Enterprise Linux BaseOS EUS (v. 10.0) kernel 6.12.0-55.82.1.el10_0, kernel-64k 6.12.0-55.82.1.el10_0, kernel-core 6.12.0-55.82.1.el10_0, kernel-tools 6.12.0-55.82.1.el10_0, kernel-modules 6.12.0-55.82.1.el10_0, kernel-64k-core 6.12.0-55.82.1.el10_0, +27 more
    fixed: vendor fix “To mitigate this issue, prevent module sctp from being loaded. Please see https://access.redhat.com/solutions/41278 for how to blacklist a kernel module to prevent it from loading automatically.” RHSA-2026:27731
  • Red Hat Enterprise Linux BaseOS EUS (v.9.6) kernel 5.14.0-570.125.1.el9_6, kernel-64k 5.14.0-570.125.1.el9_6, kernel-core 5.14.0-570.125.1.el9_6, kernel-tools 5.14.0-570.125.1.el9_6, kernel-modules 5.14.0-570.125.1.el9_6, kernel-64k-core 5.14.0-570.125.1.el9_6, +32 more
    fixed: vendor fix “To mitigate this issue, prevent module sctp from being loaded. Please see https://access.redhat.com/solutions/41278 for how to blacklist a kernel module to prevent it from loading automatically.” RHSA-2026:34094
  • Red Hat Enterprise Linux BaseOS EUS EXTENSION (v.8.4) perf 4.18.0-305.194.1.el8_4, kernel 4.18.0-305.194.1.el8_4, bpftool 4.18.0-305.194.1.el8_4, kernel-core 4.18.0-305.194.1.el8_4, kernel-tools 4.18.0-305.194.1.el8_4, python3-perf 4.18.0-305.194.1.el8_4, +8 more
    fixed: vendor fix “To mitigate this issue, prevent module sctp from being loaded. Please see https://access.redhat.com/solutions/41278 for how to blacklist a kernel module to prevent it from loading automatically.” RHSA-2026:26535
  • Red Hat Enterprise Linux BaseOS EUS EXTENSION (v.8.6) perf 4.18.0-372.198.1.el8_6, kernel 4.18.0-372.198.1.el8_6, bpftool 4.18.0-372.198.1.el8_6, kernel-core 4.18.0-372.198.1.el8_6, kernel-tools 4.18.0-372.198.1.el8_6, python3-perf 4.18.0-372.198.1.el8_6, +8 more
    fixed: vendor fix “To mitigate this issue, prevent module sctp from being loaded. Please see https://access.redhat.com/solutions/41278 for how to blacklist a kernel module to prevent it from loading automatically.” RHSA-2026:33899
  • Red Hat Enterprise Linux BaseOS TUS (v.8.8) perf 4.18.0-477.147.1.el8_8, kernel 4.18.0-477.147.1.el8_8, bpftool 4.18.0-477.147.1.el8_8, kernel-core 4.18.0-477.147.1.el8_8, kernel-tools 4.18.0-477.147.1.el8_8, python3-perf 4.18.0-477.147.1.el8_8, +8 more
    fixed: vendor fix “To mitigate this issue, prevent module sctp from being loaded. Please see https://access.redhat.com/solutions/41278 for how to blacklist a kernel module to prevent it from loading automatically.” RHSA-2026:26563
  • Red Hat Enterprise Linux CodeReady Linux Builder (v. 9) libperf 5.14.0-687.22.1.el9_8, kernel-debuginfo-common-s390x 5.14.0-687.22.1.el9_8, kernel-debuginfo-common-x86_64 5.14.0-687.22.1.el9_8, kernel-debuginfo-common-aarch64 5.14.0-687.22.1.el9_8, kernel-debuginfo-common-ppc64le 5.14.0-687.22.1.el9_8
    fixed: vendor fix “To mitigate this issue, prevent module sctp from being loaded. Please see https://access.redhat.com/solutions/41278 for how to blacklist a kernel module to prevent it from loading automatically.” RHSA-2026:36018
  • Red Hat Enterprise Linux CodeReady Linux Builder (v. 10) libperf 6.12.0-211.32.1.el10_2, kernel-debuginfo-common-s390x 6.12.0-211.32.1.el10_2, kernel-debuginfo-common-x86_64 6.12.0-211.32.1.el10_2, kernel-debuginfo-common-aarch64 6.12.0-211.32.1.el10_2, kernel-debuginfo-common-ppc64le 6.12.0-211.32.1.el10_2
    fixed: vendor fix “To mitigate this issue, prevent module sctp from being loaded. Please see https://access.redhat.com/solutions/41278 for how to blacklist a kernel module to prevent it from loading automatically.” RHSA-2026:36956
  • Red Hat Enterprise Linux CodeReady Linux Builder EUS (v. 10.0) libperf 6.12.0-55.82.1.el10_0, kernel-debuginfo-common-s390x 6.12.0-55.82.1.el10_0, kernel-debuginfo-common-x86_64 6.12.0-55.82.1.el10_0, kernel-debuginfo-common-aarch64 6.12.0-55.82.1.el10_0, kernel-debuginfo-common-ppc64le 6.12.0-55.82.1.el10_0
    fixed: vendor fix “To mitigate this issue, prevent module sctp from being loaded. Please see https://access.redhat.com/solutions/41278 for how to blacklist a kernel module to prevent it from loading automatically.” RHSA-2026:27731
  • Red Hat Enterprise Linux CRB (v. 8) kernel-debuginfo-common-x86_64 4.18.0-553.140.1.el8_10, kernel-debuginfo-common-aarch64 4.18.0-553.140.1.el8_10, kernel-debuginfo-common-ppc64le 4.18.0-553.140.1.el8_10
    fixed: vendor fix “To mitigate this issue, prevent module sctp from being loaded. Please see https://access.redhat.com/solutions/41278 for how to blacklist a kernel module to prevent it from loading automatically.” RHSA-2026:36349
  • Red Hat Enterprise Linux NFV (v. 8) kernel-rt 4.18.0-553.140.1.rt7.481.el8_10, kernel-rt-kvm 4.18.0-553.140.1.rt7.481.el8_10, kernel-rt-core 4.18.0-553.140.1.rt7.481.el8_10, kernel-rt-modules 4.18.0-553.140.1.rt7.481.el8_10, kernel-rt-debug-kvm 4.18.0-553.140.1.rt7.481.el8_10, kernel-rt-debug-core 4.18.0-553.140.1.rt7.481.el8_10, +4 more
    fixed: vendor fix “To mitigate this issue, prevent module sctp from being loaded. Please see https://access.redhat.com/solutions/41278 for how to blacklist a kernel module to prevent it from loading automatically.” RHSA-2026:36348
  • Red Hat Enterprise Linux Real Time (v. 9) kernel-rt 5.14.0-687.22.1.el9_8, kernel-rt-64k 5.14.0-687.22.1.el9_8, kernel-rt-core 5.14.0-687.22.1.el9_8, kernel-rt-modules 5.14.0-687.22.1.el9_8, kernel-rt-64k-core 5.14.0-687.22.1.el9_8, kernel-rt-debug-core 5.14.0-687.22.1.el9_8, +14 more
    fixed: vendor fix “To mitigate this issue, prevent module sctp from being loaded. Please see https://access.redhat.com/solutions/41278 for how to blacklist a kernel module to prevent it from loading automatically.” RHSA-2026:36018
  • Red Hat Enterprise Linux Real Time (v. 10) kernel-rt 6.12.0-211.32.1.el10_2, kernel-rt-64k 6.12.0-211.32.1.el10_2, kernel-rt-core 6.12.0-211.32.1.el10_2, kernel-rt-modules 6.12.0-211.32.1.el10_2, kernel-rt-64k-core 6.12.0-211.32.1.el10_2, kernel-rt-debug-core 6.12.0-211.32.1.el10_2, +14 more
    fixed: vendor fix “To mitigate this issue, prevent module sctp from being loaded. Please see https://access.redhat.com/solutions/41278 for how to blacklist a kernel module to prevent it from loading automatically.” RHSA-2026:36956
  • Red Hat Enterprise Linux Real Time E4S (v.9.2) kernel-rt 5.14.0-284.176.1.rt14.461.el9_2, kernel-rt-core 5.14.0-284.176.1.rt14.461.el9_2, kernel-rt-modules 5.14.0-284.176.1.rt14.461.el9_2, kernel-rt-debug-core 5.14.0-284.176.1.rt14.461.el9_2, kernel-rt-modules-core 5.14.0-284.176.1.rt14.461.el9_2, kernel-rt-debug-modules 5.14.0-284.176.1.rt14.461.el9_2, +4 more
    fixed: vendor fix “To mitigate this issue, prevent module sctp from being loaded. Please see https://access.redhat.com/solutions/41278 for how to blacklist a kernel module to prevent it from loading automatically.” RHSA-2026:26462
  • Red Hat Enterprise Linux Real Time E4S (v.9.4) kernel-rt 5.14.0-427.132.1.el9_4, kernel-rt-core 5.14.0-427.132.1.el9_4, kernel-rt-modules 5.14.0-427.132.1.el9_4, kernel-rt-debug-core 5.14.0-427.132.1.el9_4, kernel-rt-modules-core 5.14.0-427.132.1.el9_4, kernel-rt-debug-modules 5.14.0-427.132.1.el9_4, +4 more
    fixed: vendor fix “To mitigate this issue, prevent module sctp from being loaded. Please see https://access.redhat.com/solutions/41278 for how to blacklist a kernel module to prevent it from loading automatically.” RHSA-2026:27735
  • Red Hat Enterprise Linux Real Time EUS (v. 10.0) kernel-rt 6.12.0-55.82.1.el10_0, kernel-rt-64k 6.12.0-55.82.1.el10_0, kernel-rt-core 6.12.0-55.82.1.el10_0, kernel-rt-modules 6.12.0-55.82.1.el10_0, kernel-rt-64k-core 6.12.0-55.82.1.el10_0, kernel-rt-debug-core 6.12.0-55.82.1.el10_0, +14 more
    fixed: vendor fix “To mitigate this issue, prevent module sctp from being loaded. Please see https://access.redhat.com/solutions/41278 for how to blacklist a kernel module to prevent it from loading automatically.” RHSA-2026:27731
  • Red Hat Enterprise Linux Real Time EUS (v.9.6) kernel-rt 5.14.0-570.125.1.el9_6, kernel-rt-64k 5.14.0-570.125.1.el9_6, kernel-rt-core 5.14.0-570.125.1.el9_6, kernel-rt-modules 5.14.0-570.125.1.el9_6, kernel-rt-64k-core 5.14.0-570.125.1.el9_6, kernel-rt-debug-core 5.14.0-570.125.1.el9_6, +14 more
    fixed: vendor fix “To mitigate this issue, prevent module sctp from being loaded. Please see https://access.redhat.com/solutions/41278 for how to blacklist a kernel module to prevent it from loading automatically.” RHSA-2026:34094
  • Red Hat Enterprise Linux Real Time for NFV (v. 9) kernel-rt 5.14.0-687.22.1.el9_8, kernel-rt-core 5.14.0-687.22.1.el9_8, kernel-rt-modules 5.14.0-687.22.1.el9_8, kernel-rt-debug-core 5.14.0-687.22.1.el9_8, kernel-rt-modules-core 5.14.0-687.22.1.el9_8, kernel-rt-debug-modules 5.14.0-687.22.1.el9_8, +4 more
    fixed: vendor fix “To mitigate this issue, prevent module sctp from being loaded. Please see https://access.redhat.com/solutions/41278 for how to blacklist a kernel module to prevent it from loading automatically.” RHSA-2026:36018
  • Red Hat Enterprise Linux Real Time for NFV (v. 10) kernel-rt 6.12.0-211.32.1.el10_2, kernel-rt-core 6.12.0-211.32.1.el10_2, kernel-rt-modules 6.12.0-211.32.1.el10_2, kernel-rt-debug-core 6.12.0-211.32.1.el10_2, kernel-rt-modules-core 6.12.0-211.32.1.el10_2, kernel-rt-debug-modules 6.12.0-211.32.1.el10_2, +4 more
    fixed: vendor fix “To mitigate this issue, prevent module sctp from being loaded. Please see https://access.redhat.com/solutions/41278 for how to blacklist a kernel module to prevent it from loading automatically.” RHSA-2026:36956
  • Red Hat Enterprise Linux Real Time for NFV E4S (v.9.2) kernel-rt 5.14.0-284.176.1.rt14.461.el9_2, kernel-rt-kvm 5.14.0-284.176.1.rt14.461.el9_2, kernel-rt-core 5.14.0-284.176.1.rt14.461.el9_2, kernel-rt-modules 5.14.0-284.176.1.rt14.461.el9_2, kernel-rt-debug-kvm 5.14.0-284.176.1.rt14.461.el9_2, kernel-rt-debug-core 5.14.0-284.176.1.rt14.461.el9_2, +6 more
    fixed: vendor fix “To mitigate this issue, prevent module sctp from being loaded. Please see https://access.redhat.com/solutions/41278 for how to blacklist a kernel module to prevent it from loading automatically.” RHSA-2026:26462
  • Red Hat Enterprise Linux Real Time for NFV E4S (v.9.4) kernel-rt 5.14.0-427.132.1.el9_4, kernel-rt-kvm 5.14.0-427.132.1.el9_4, kernel-rt-core 5.14.0-427.132.1.el9_4, kernel-rt-modules 5.14.0-427.132.1.el9_4, kernel-rt-debug-kvm 5.14.0-427.132.1.el9_4, kernel-rt-debug-core 5.14.0-427.132.1.el9_4, +6 more
    fixed: vendor fix “To mitigate this issue, prevent module sctp from being loaded. Please see https://access.redhat.com/solutions/41278 for how to blacklist a kernel module to prevent it from loading automatically.” RHSA-2026:27735
  • Red Hat Enterprise Linux Real Time for NFV EUS (v. 10.0) kernel-rt 6.12.0-55.82.1.el10_0, kernel-rt-kvm 6.12.0-55.82.1.el10_0, kernel-rt-core 6.12.0-55.82.1.el10_0, kernel-rt-modules 6.12.0-55.82.1.el10_0, kernel-rt-debug-kvm 6.12.0-55.82.1.el10_0, kernel-rt-debug-core 6.12.0-55.82.1.el10_0, +6 more
    fixed: vendor fix “To mitigate this issue, prevent module sctp from being loaded. Please see https://access.redhat.com/solutions/41278 for how to blacklist a kernel module to prevent it from loading automatically.” RHSA-2026:27731
  • Red Hat Enterprise Linux Real Time for NFV EUS (v.9.6) kernel-rt 5.14.0-570.125.1.el9_6, kernel-rt-kvm 5.14.0-570.125.1.el9_6, kernel-rt-core 5.14.0-570.125.1.el9_6, kernel-rt-modules 5.14.0-570.125.1.el9_6, kernel-rt-debug-kvm 5.14.0-570.125.1.el9_6, kernel-rt-debug-core 5.14.0-570.125.1.el9_6, +6 more
    fixed: vendor fix “To mitigate this issue, prevent module sctp from being loaded. Please see https://access.redhat.com/solutions/41278 for how to blacklist a kernel module to prevent it from loading automatically.” RHSA-2026:34094
  • Red Hat Enterprise Linux RT (v. 8) kernel-rt 4.18.0-553.140.1.rt7.481.el8_10, kernel-rt-core 4.18.0-553.140.1.rt7.481.el8_10, kernel-rt-modules 4.18.0-553.140.1.rt7.481.el8_10, kernel-rt-debug-core 4.18.0-553.140.1.rt7.481.el8_10, kernel-rt-debug-modules 4.18.0-553.140.1.rt7.481.el8_10, kernel-rt-modules-extra 4.18.0-553.140.1.rt7.481.el8_10, +2 more
    fixed: vendor fix “To mitigate this issue, prevent module sctp from being loaded. Please see https://access.redhat.com/solutions/41278 for how to blacklist a kernel module to prevent it from loading automatically.” RHSA-2026:36348
  • Red Hat Enterprise Linux 6 perf, kernel, python-perf, kernel-kdump, kernel-firmware, kernel-bootwrapper, +1 more Red Hat Enterprise Linux 7 perf, kernel, bpftool, python-perf, kernel-kdump, kernel-tools, +3 more
    not affected: vulnerable code not present

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

cisa ICSA-26-295-16 updated cvss 7.8

Siemens SIMATIC S7-1500 TM MFP

  • Siemens SIMATIC S7-1500 TM MFP - GNU/Linux subsystem
    affected: mitigation, no fix available

Facts from CISA's republication of the vendor's own advisory (CSAF); the linked advisory is the authoritative source. CISA notification · csaf

CISA SSVC

Exploitation
none
Automatable
no
Technical impact
total
Assessed
23 d ago

Exploit prediction

0.10% chance of exploitation in the next 30 days, higher than 1% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by version score vector
CNA 3.1 7.8 CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
CISA ADP 3.1 7.0 CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H
CNA 3.1 7.0 CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H

Affected products

  • Linux Linux
  • Red Hat Red Hat Enterprise Linux 10
  • Red Hat Red Hat Enterprise Linux 10.0 Extended Update Support
  • Red Hat Red Hat Enterprise Linux 8
  • Red Hat Red Hat Enterprise Linux 8.4 Advanced Mission Critical Update Support
  • Red Hat Red Hat Enterprise Linux 8.4 Extended Update Support Long-Life Add-On
  • Red Hat Red Hat Enterprise Linux 8.6 Advanced Mission Critical Update Support
  • Red Hat Red Hat Enterprise Linux 8.6 Extended Update Support Long-Life Add-On
  • Red Hat Red Hat Enterprise Linux 8.8 Telecommunications Update Service
  • Red Hat Red Hat Enterprise Linux 8.8 Update Services for SAP Solutions
  • Red Hat Red Hat Enterprise Linux 9
  • Red Hat Red Hat Enterprise Linux 9.2 Update Services for SAP Solutions
  • Red Hat Red Hat Enterprise Linux 9.4 Update Services for SAP Solutions
  • Red Hat Red Hat Enterprise Linux 9.6 Extended Update Support
  • Red Hat Red Hat Enterprise Linux 6
  • Red Hat Red Hat Enterprise Linux 7
  • Siemens SIMATIC S7-1500 TM MFP - GNU/Linux subsystem

Classification

Weakness
  • CWE-367 Time-of-check Time-of-use (TOCTOU) Race Condition
  • CWE-362 Concurrent Execution using Shared Resource with Improper Synchronization
  • CWE-416 Use After Free
Technology feeds

References

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.