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Fencer Vulns
critical 9.8

CVE-2026-52924 in the critical feed json

sctp: purge outqueue on stale COOKIE-ECHO handling

published 2026-06-24 4 mo ago modified 2026-10-19 20 d ago also EUVD-2026-38727

cvss
9.8
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
0.7%
EPSS 0.7% chance of exploitation in 30 days, percentile 51%
public exploits
0
none known

Summary

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

sctp: purge outqueue on stale COOKIE-ECHO handling

sctp_stream_update() is only invoked when the association is moved into COOKIE_WAIT during association setup/reconfiguration. In this path, the outbound stream scheduler state (stream->out_curr) is expected to be clean, since no user data should have been transmitted yet unless the state machine has already partially progressed.

However, a corner case exists in sctp_sf_do_5_2_6_stale(): when a Stale Cookie ERROR is received, the association is rolled back from COOKIE_ECHOED to COOKIE_WAIT. In this scenario, user data may already have been queued and even bundled with the COOKIE-ECHO chunk.

During the rollback, sctp_stream_update() frees the old stream table and installs a new one, but it does not invalidate stream->out_curr. As a result, out_curr may still point to a freed sctp_stream_out entry from the previous stream state.

Later, SCTP scheduler dequeue paths (FCFS, RR, PRIO, etc.) rely on stream->out_curr->ext, which can lead to use-after-free once the old stream state has been released via sctp_stream_free().

This results in crashes such as (reported by Yuqi):

BUG: KASAN: slab-use-after-free in sctp_sched_fcfs_dequeue+0x13a/0x140 Read of size 8 at addr ff1100004d4d3208 by task mini_poc/9312 CPU: 1 UID: 1001 PID: 9312 Comm: mini_poc Not tainted 7.1.0-rc1-00305-gbd3a4795d574 #5 PREEMPT(full) sctp_sched_fcfs_dequeue+0x13a/0x140 sctp_outq_flush+0x1603/0x33e0 sctp_do_sm+0x31c9/0x5d30 sctp_assoc_bh_rcv+0x392/0x6f0 sctp_inq_push+0x1db/0x270 sctp_rcv+0x138d/0x3c10

Fix this by fully purging the association outqueue when handling the Stale Cookie case. This ensures all pending transmit and retransmit state is dropped, and any scheduler cached pointers are invalidated, making it safe to rebuild stream state during COOKIE_WAIT restart.

Updating only stream->out_curr would be insufficient, since queued and retransmittable data would still reference the old stream state and trigger later use-after-free in dequeue paths.

Patch / fix

  • Linux Linux 5.10.259, 5.15.210, 6.1.176, 6.6.143, 6.12.94, 6.18.36, 7.0.13, 7.1
  • Red Hat Red Hat Enterprise Linux 8 0:4.18.0-553.158.1.el8_10, 0:4.18.0-553.158.1.rt7.499.el8_10
  • Red Hat Red Hat Enterprise Linux 9 0:5.14.0-687.42.1.el9_8
  • linux Debian 12 6.1.176-1
  • linux Debian 13 6.12.94-1
  • linux Debian 14 7.0.13-1

debian advisories DEBIAN-CVE-2026-52924

  • linux Ubuntu 22.04 LTS 5.15.0-187.197
  • linux Ubuntu 24.04 LTS 6.8.0-137.137
  • linux Ubuntu 26.04 LTS 7.0.0-29.29
  • linux-aws Ubuntu 22.04 LTS 5.15.0-1113.120
  • linux-aws Ubuntu 24.04 LTS 6.8.0-1062.65
  • linux-aws Ubuntu 26.04 LTS 7.0.0-1010.10
  • linux-gcp Ubuntu 22.04 LTS 5.15.0-1114.124
  • linux-gcp Ubuntu 24.04 LTS 6.8.0-1065.73

ubuntu advisories UBUNTU-CVE-2026-52924

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

  • kernel RHEL 10.2 6.12.0-211.55.1.el10_2
  • rv RHEL 10.2 6.12.0-211.55.1.el10_2
  • perf RHEL 10.2 6.12.0-211.55.1.el10_2
  • rtla RHEL 10.2 6.12.0-211.55.1.el10_2
  • libperf RHEL 10.2 6.12.0-211.55.1.el10_2
  • kernel-rt RHEL 10.2 6.12.0-211.55.1.el10_2
  • kernel-64k RHEL 10.2 6.12.0-211.55.1.el10_2
  • kernel-core RHEL 10.2 6.12.0-211.55.1.el10_2

red hat advisories RHSA-2026:77634RHSA-2026:77301RHSA-2026:77217RHSA-2026:77216RHSA-2026:77214RHSA-2026:77215

  • kernel-source Linux Micro 6.1, Linux Micro 6.0 6.4.0-50.2
  • kernel-default Linux Micro 6.1, Linux Micro 6.0 6.4.0-50.1
  • kernel-kvmsmall Linux Micro 6.1, Linux Micro 6.0 6.4.0-50.1
  • kernel-rt Linux Micro 6.1, Linux Micro 6.0 6.4.0-50.1
  • kernel-source-rt Linux Micro 6.1, Linux Micro 6.0 6.4.0-50.2
  • kernel-64kb SLE Module for Basesystem 15 SP7 6.4.0-150700.53.73.2
  • kernel-syms SLE Module for Development Tools 15 SP7 6.4.0-150700.53.73.1
  • kernel-azure SLE Module for Public Cloud 15 SP7 6.4.0-150700.53.73.2

suse advisories SUSE-SU-2026:22810-1SUSE-SU-2026:22809-1SUSE-SU-2026:22904-1SUSE-SU-2026:22903-1SUSE-SU-2026:3166-1SUSE-SU-2026:3156-1

  • 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-2026:21388-1

  • kernel AlmaLinux 10 6.12.0-211.55.1.el10_2
  • rv AlmaLinux 10 6.12.0-211.55.1.el10_2
  • perf AlmaLinux 10 6.12.0-211.55.1.el10_2
  • rtla AlmaLinux 10 6.12.0-211.55.1.el10_2
  • libperf AlmaLinux 10 6.12.0-211.55.1.el10_2
  • kernel-rt AlmaLinux 10 6.12.0-211.55.1.el10_2
  • kernel-64k AlmaLinux 10 6.12.0-211.55.1.el10_2
  • kernel-core AlmaLinux 10 6.12.0-211.55.1.el10_2

almalinux advisories ALSA-2026:67471ALSA-2026:59723ALSA-2026:59737ALSA-2026:59821

  • kernel Rocky Linux 10 6.12.0-211.55.1.el10_2
  • kernel Rocky Linux 9 5.14.0-687.42.1.el9_8
  • kernel-rt Rocky Linux 8 4.18.0-553.158.1.rt7.499.el8_10
  • kernel Rocky Linux 8 4.18.0-553.158.1.el8_10

rocky linux advisories RLSA-2026:67471RLSA-2026:59723RLSA-2026:59737RLSA-2026:59821

  • kernel Azure Linux 3.0 6.6.143.1-1

azure linux advisories AZL-90609

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-2026-52924 updated cvss 8.8

kernel: sctp: purge outqueue on stale COOKIE-ECHO handling

  • Red Hat Enterprise Linux 9 kernel-rt, kernel-rt-kvm, kernel-rt-core, kernel-rt-modules, kernel-rt-debug-kvm, kernel-rt-debug-core, +12 more
    affected: workaround, no fix available
  • Red Hat CodeReady Linux Builder EUS (v.9.6) libperf 5.14.0-570.146.1.el9_6, kernel-debuginfo-common-s390x 5.14.0-570.146.1.el9_6, kernel-debuginfo-common-x86_64 5.14.0-570.146.1.el9_6, kernel-debuginfo-common-aarch64 5.14.0-570.146.1.el9_6, kernel-debuginfo-common-ppc64le 5.14.0-570.146.1.el9_6
    fixed: vendor fix RHSA-2026:74174
  • Red Hat Enterprise Linux AppStream (v. 9) rv 5.14.0-687.42.1.el9_8, perf 5.14.0-687.42.1.el9_8, rtla 5.14.0-687.42.1.el9_8, python3-perf 5.14.0-687.42.1.el9_8, kernel-devel-matched 5.14.0-687.42.1.el9_8, kernel-64k-devel-matched 5.14.0-687.42.1.el9_8, +7 more
    fixed: vendor fix RHSA-2026:59723
  • Red Hat Enterprise Linux AppStream (v. 10) rv 6.12.0-211.55.1.el10_2, perf 6.12.0-211.55.1.el10_2, rtla 6.12.0-211.55.1.el10_2, python3-perf 6.12.0-211.55.1.el10_2, kernel-devel-matched 6.12.0-211.55.1.el10_2, kernel-64k-devel-matched 6.12.0-211.55.1.el10_2, +7 more
    fixed: vendor fix RHSA-2026:67471
  • Red Hat Enterprise Linux AppStream E4S (v.9.2) perf 5.14.0-284.195.1.el9_2, rtla 5.14.0-284.195.1.el9_2, kernel-devel-matched 5.14.0-284.195.1.el9_2, kernel-64k-devel-matched 5.14.0-284.195.1.el9_2, kernel-debug-devel-matched 5.14.0-284.195.1.el9_2, kernel-debuginfo-common-s390x 5.14.0-284.195.1.el9_2, +5 more
    fixed: vendor fix RHSA-2026:77215
  • Red Hat Enterprise Linux AppStream E4S (v.9.4) rv 5.14.0-427.153.1.el9_4, perf 5.14.0-427.153.1.el9_4, rtla 5.14.0-427.153.1.el9_4, kernel-devel-matched 5.14.0-427.153.1.el9_4, kernel-64k-devel-matched 5.14.0-427.153.1.el9_4, kernel-debug-devel-matched 5.14.0-427.153.1.el9_4, +6 more
    fixed: vendor fix RHSA-2026:73645
  • Red Hat Enterprise Linux AppStream EUS (v. 10.0) rv 6.12.0-55.109.1.el10_0, perf 6.12.0-55.109.1.el10_0, rtla 6.12.0-55.109.1.el10_0, python3-perf 6.12.0-55.109.1.el10_0, kernel-devel-matched 6.12.0-55.109.1.el10_0, kernel-64k-devel-matched 6.12.0-55.109.1.el10_0, +7 more
    fixed: vendor fix RHSA-2026:77634
  • Red Hat Enterprise Linux AppStream EUS (v.9.6) rv 5.14.0-570.146.1.el9_6, perf 5.14.0-570.146.1.el9_6, rtla 5.14.0-570.146.1.el9_6, python3-perf 5.14.0-570.146.1.el9_6, kernel-devel-matched 5.14.0-570.146.1.el9_6, kernel-64k-devel-matched 5.14.0-570.146.1.el9_6, +7 more
    fixed: vendor fix RHSA-2026:74174
show 32 more
  • Red Hat Enterprise Linux BaseOS (v. 8) perf 4.18.0-553.158.1.el8_10, kernel 4.18.0-553.158.1.el8_10, bpftool 4.18.0-553.158.1.el8_10, kernel-core 4.18.0-553.158.1.el8_10, kernel-tools 4.18.0-553.158.1.el8_10, python3-perf 4.18.0-553.158.1.el8_10, +15 more
    fixed: vendor fix RHSA-2026:59821
  • Red Hat Enterprise Linux BaseOS (v. 9) kernel 5.14.0-687.42.1.el9_8, kernel-64k 5.14.0-687.42.1.el9_8, kernel-core 5.14.0-687.42.1.el9_8, kernel-tools 5.14.0-687.42.1.el9_8, kernel-modules 5.14.0-687.42.1.el9_8, kernel-64k-core 5.14.0-687.42.1.el9_8, +27 more
    fixed: vendor fix RHSA-2026:59723
  • Red Hat Enterprise Linux BaseOS (v. 10) kernel 6.12.0-211.55.1.el10_2, kernel-64k 6.12.0-211.55.1.el10_2, kernel-core 6.12.0-211.55.1.el10_2, kernel-tools 6.12.0-211.55.1.el10_2, kernel-modules 6.12.0-211.55.1.el10_2, kernel-64k-core 6.12.0-211.55.1.el10_2, +28 more
    fixed: vendor fix RHSA-2026:67471
  • Red Hat Enterprise Linux BaseOS AUS (v.8.4) perf 4.18.0-305.211.1.el8_4, kernel 4.18.0-305.211.1.el8_4, bpftool 4.18.0-305.211.1.el8_4, kernel-core 4.18.0-305.211.1.el8_4, kernel-tools 4.18.0-305.211.1.el8_4, python3-perf 4.18.0-305.211.1.el8_4, +8 more
    fixed: vendor fix RHSA-2026:77217
  • Red Hat Enterprise Linux BaseOS AUS (v.8.6) perf 4.18.0-372.220.1.el8_6, kernel 4.18.0-372.220.1.el8_6, bpftool 4.18.0-372.220.1.el8_6, kernel-core 4.18.0-372.220.1.el8_6, kernel-tools 4.18.0-372.220.1.el8_6, python3-perf 4.18.0-372.220.1.el8_6, +8 more
    fixed: vendor fix RHSA-2026:77216
  • Red Hat Enterprise Linux BaseOS E4S (v.8.8) perf 4.18.0-477.172.1.el8_8, kernel 4.18.0-477.172.1.el8_8, bpftool 4.18.0-477.172.1.el8_8, kernel-core 4.18.0-477.172.1.el8_8, kernel-tools 4.18.0-477.172.1.el8_8, python3-perf 4.18.0-477.172.1.el8_8, +9 more
    fixed: vendor fix RHSA-2026:77301
  • Red Hat Enterprise Linux BaseOS E4S (v.9.2) bpftool 7.0.0-284.195.1.el9_2, kernel 5.14.0-284.195.1.el9_2, kernel-64k 5.14.0-284.195.1.el9_2, kernel-core 5.14.0-284.195.1.el9_2, kernel-tools 5.14.0-284.195.1.el9_2, python3-perf 5.14.0-284.195.1.el9_2, +28 more
    fixed: vendor fix RHSA-2026:77215
  • Red Hat Enterprise Linux BaseOS E4S (v.9.4) bpftool 7.3.0-427.153.1.el9_4, kernel 5.14.0-427.153.1.el9_4, kernel-64k 5.14.0-427.153.1.el9_4, kernel-core 5.14.0-427.153.1.el9_4, kernel-tools 5.14.0-427.153.1.el9_4, python3-perf 5.14.0-427.153.1.el9_4, +28 more
    fixed: vendor fix RHSA-2026:73645
  • Red Hat Enterprise Linux BaseOS EUS (v. 10.0) kernel 6.12.0-55.109.1.el10_0, kernel-64k 6.12.0-55.109.1.el10_0, kernel-core 6.12.0-55.109.1.el10_0, kernel-tools 6.12.0-55.109.1.el10_0, kernel-modules 6.12.0-55.109.1.el10_0, kernel-64k-core 6.12.0-55.109.1.el10_0, +27 more
    fixed: vendor fix RHSA-2026:77634
  • Red Hat Enterprise Linux BaseOS EUS (v.9.6) kernel 5.14.0-570.146.1.el9_6, kernel-64k 5.14.0-570.146.1.el9_6, kernel-core 5.14.0-570.146.1.el9_6, kernel-tools 5.14.0-570.146.1.el9_6, kernel-modules 5.14.0-570.146.1.el9_6, kernel-64k-core 5.14.0-570.146.1.el9_6, +27 more
    fixed: vendor fix RHSA-2026:74174
  • Red Hat Enterprise Linux BaseOS EUS EXTENSION (v.8.4) perf 4.18.0-305.211.1.el8_4, kernel 4.18.0-305.211.1.el8_4, bpftool 4.18.0-305.211.1.el8_4, kernel-core 4.18.0-305.211.1.el8_4, kernel-tools 4.18.0-305.211.1.el8_4, python3-perf 4.18.0-305.211.1.el8_4, +15 more
    fixed: vendor fix RHSA-2026:77217
  • Red Hat Enterprise Linux BaseOS EUS EXTENSION (v.8.6) perf 4.18.0-372.220.1.el8_6, kernel 4.18.0-372.220.1.el8_6, bpftool 4.18.0-372.220.1.el8_6, kernel-core 4.18.0-372.220.1.el8_6, kernel-tools 4.18.0-372.220.1.el8_6, python3-perf 4.18.0-372.220.1.el8_6, +15 more
    fixed: vendor fix RHSA-2026:77216
  • Red Hat Enterprise Linux BaseOS TUS (v.8.8) perf 4.18.0-477.172.1.el8_8, kernel 4.18.0-477.172.1.el8_8, bpftool 4.18.0-477.172.1.el8_8, kernel-core 4.18.0-477.172.1.el8_8, kernel-tools 4.18.0-477.172.1.el8_8, python3-perf 4.18.0-477.172.1.el8_8, +8 more
    fixed: vendor fix RHSA-2026:77301
  • Red Hat Enterprise Linux CodeReady Linux Builder (v. 9) libperf 5.14.0-687.42.1.el9_8, kernel-debuginfo-common-s390x 5.14.0-687.42.1.el9_8, kernel-debuginfo-common-x86_64 5.14.0-687.42.1.el9_8, kernel-debuginfo-common-aarch64 5.14.0-687.42.1.el9_8, kernel-debuginfo-common-ppc64le 5.14.0-687.42.1.el9_8
    fixed: vendor fix RHSA-2026:59723
  • Red Hat Enterprise Linux CodeReady Linux Builder (v. 10) libperf 6.12.0-211.55.1.el10_2, kernel-debuginfo-common-s390x 6.12.0-211.55.1.el10_2, kernel-debuginfo-common-x86_64 6.12.0-211.55.1.el10_2, kernel-debuginfo-common-aarch64 6.12.0-211.55.1.el10_2, kernel-debuginfo-common-ppc64le 6.12.0-211.55.1.el10_2
    fixed: vendor fix RHSA-2026:67471
  • Red Hat Enterprise Linux CodeReady Linux Builder EUS (v. 10.0) libperf 6.12.0-55.109.1.el10_0, kernel-debuginfo-common-s390x 6.12.0-55.109.1.el10_0, kernel-debuginfo-common-x86_64 6.12.0-55.109.1.el10_0, kernel-debuginfo-common-aarch64 6.12.0-55.109.1.el10_0, kernel-debuginfo-common-ppc64le 6.12.0-55.109.1.el10_0
    fixed: vendor fix RHSA-2026:77634
  • Red Hat Enterprise Linux CRB (v. 8) kernel-debuginfo-common-x86_64 4.18.0-553.158.1.el8_10, kernel-debuginfo-common-aarch64 4.18.0-553.158.1.el8_10, kernel-debuginfo-common-ppc64le 4.18.0-553.158.1.el8_10
    fixed: vendor fix RHSA-2026:59821
  • Red Hat Enterprise Linux NFV (v. 8) kernel-rt 4.18.0-553.158.1.rt7.499.el8_10, kernel-rt-kvm 4.18.0-553.158.1.rt7.499.el8_10, kernel-rt-core 4.18.0-553.158.1.rt7.499.el8_10, kernel-rt-modules 4.18.0-553.158.1.rt7.499.el8_10, kernel-rt-debug-kvm 4.18.0-553.158.1.rt7.499.el8_10, kernel-rt-debug-core 4.18.0-553.158.1.rt7.499.el8_10, +4 more
    fixed: vendor fix RHSA-2026:59737
  • Red Hat Enterprise Linux Real Time (v. 9) kernel-rt 5.14.0-687.42.1.el9_8, kernel-rt-64k 5.14.0-687.42.1.el9_8, kernel-rt-core 5.14.0-687.42.1.el9_8, kernel-rt-modules 5.14.0-687.42.1.el9_8, kernel-rt-64k-core 5.14.0-687.42.1.el9_8, kernel-rt-debug-core 5.14.0-687.42.1.el9_8, +14 more
    fixed: vendor fix RHSA-2026:59723
  • Red Hat Enterprise Linux Real Time (v. 10) kernel-rt 6.12.0-211.55.1.el10_2, kernel-rt-64k 6.12.0-211.55.1.el10_2, kernel-rt-core 6.12.0-211.55.1.el10_2, kernel-rt-modules 6.12.0-211.55.1.el10_2, kernel-rt-64k-core 6.12.0-211.55.1.el10_2, kernel-rt-debug-core 6.12.0-211.55.1.el10_2, +14 more
    fixed: vendor fix RHSA-2026:67471
  • Red Hat Enterprise Linux Real Time E4S (v.9.2) kernel-rt 5.14.0-284.195.1.rt14.480.el9_2, kernel-rt-core 5.14.0-284.195.1.rt14.480.el9_2, kernel-rt-modules 5.14.0-284.195.1.rt14.480.el9_2, kernel-rt-debug-core 5.14.0-284.195.1.rt14.480.el9_2, kernel-rt-modules-core 5.14.0-284.195.1.rt14.480.el9_2, kernel-rt-debug-modules 5.14.0-284.195.1.rt14.480.el9_2, +4 more
    fixed: vendor fix RHSA-2026:77214
  • Red Hat Enterprise Linux Real Time E4S (v.9.4) kernel-rt 5.14.0-427.153.1.el9_4, kernel-rt-core 5.14.0-427.153.1.el9_4, kernel-rt-modules 5.14.0-427.153.1.el9_4, kernel-rt-debug-core 5.14.0-427.153.1.el9_4, kernel-rt-modules-core 5.14.0-427.153.1.el9_4, kernel-rt-debug-modules 5.14.0-427.153.1.el9_4, +4 more
    fixed: vendor fix RHSA-2026:73645
  • Red Hat Enterprise Linux Real Time EUS (v. 10.0) kernel-rt 6.12.0-55.109.1.el10_0, kernel-rt-64k 6.12.0-55.109.1.el10_0, kernel-rt-core 6.12.0-55.109.1.el10_0, kernel-rt-modules 6.12.0-55.109.1.el10_0, kernel-rt-64k-core 6.12.0-55.109.1.el10_0, kernel-rt-debug-core 6.12.0-55.109.1.el10_0, +14 more
    fixed: vendor fix RHSA-2026:77634
  • Red Hat Enterprise Linux Real Time EUS (v.9.6) kernel-rt 5.14.0-570.146.1.el9_6, kernel-rt-64k 5.14.0-570.146.1.el9_6, kernel-rt-core 5.14.0-570.146.1.el9_6, kernel-rt-modules 5.14.0-570.146.1.el9_6, kernel-rt-64k-core 5.14.0-570.146.1.el9_6, kernel-rt-debug-core 5.14.0-570.146.1.el9_6, +14 more
    fixed: vendor fix RHSA-2026:74174
  • Red Hat Enterprise Linux Real Time for NFV (v. 9) kernel-rt 5.14.0-687.42.1.el9_8, kernel-rt-core 5.14.0-687.42.1.el9_8, kernel-rt-modules 5.14.0-687.42.1.el9_8, kernel-rt-debug-core 5.14.0-687.42.1.el9_8, kernel-rt-modules-core 5.14.0-687.42.1.el9_8, kernel-rt-debug-modules 5.14.0-687.42.1.el9_8, +4 more
    fixed: vendor fix RHSA-2026:59723
  • Red Hat Enterprise Linux Real Time for NFV (v. 10) kernel-rt 6.12.0-211.55.1.el10_2, kernel-rt-core 6.12.0-211.55.1.el10_2, kernel-rt-modules 6.12.0-211.55.1.el10_2, kernel-rt-debug-core 6.12.0-211.55.1.el10_2, kernel-rt-modules-core 6.12.0-211.55.1.el10_2, kernel-rt-debug-modules 6.12.0-211.55.1.el10_2, +4 more
    fixed: vendor fix RHSA-2026:67471
  • Red Hat Enterprise Linux Real Time for NFV E4S (v.9.2) kernel-rt 5.14.0-284.195.1.rt14.480.el9_2, kernel-rt-kvm 5.14.0-284.195.1.rt14.480.el9_2, kernel-rt-core 5.14.0-284.195.1.rt14.480.el9_2, kernel-rt-modules 5.14.0-284.195.1.rt14.480.el9_2, kernel-rt-debug-kvm 5.14.0-284.195.1.rt14.480.el9_2, kernel-rt-debug-core 5.14.0-284.195.1.rt14.480.el9_2, +6 more
    fixed: vendor fix RHSA-2026:77214
  • Red Hat Enterprise Linux Real Time for NFV E4S (v.9.4) kernel-rt 5.14.0-427.153.1.el9_4, kernel-rt-kvm 5.14.0-427.153.1.el9_4, kernel-rt-core 5.14.0-427.153.1.el9_4, kernel-rt-modules 5.14.0-427.153.1.el9_4, kernel-rt-debug-kvm 5.14.0-427.153.1.el9_4, kernel-rt-debug-core 5.14.0-427.153.1.el9_4, +6 more
    fixed: vendor fix RHSA-2026:73645
  • Red Hat Enterprise Linux Real Time for NFV EUS (v. 10.0) kernel-rt 6.12.0-55.109.1.el10_0, kernel-rt-kvm 6.12.0-55.109.1.el10_0, kernel-rt-core 6.12.0-55.109.1.el10_0, kernel-rt-modules 6.12.0-55.109.1.el10_0, kernel-rt-debug-kvm 6.12.0-55.109.1.el10_0, kernel-rt-debug-core 6.12.0-55.109.1.el10_0, +6 more
    fixed: vendor fix RHSA-2026:77634
  • Red Hat Enterprise Linux Real Time for NFV EUS (v.9.6) kernel-rt 5.14.0-570.146.1.el9_6, kernel-rt-kvm 5.14.0-570.146.1.el9_6, kernel-rt-core 5.14.0-570.146.1.el9_6, kernel-rt-modules 5.14.0-570.146.1.el9_6, kernel-rt-debug-kvm 5.14.0-570.146.1.el9_6, kernel-rt-debug-core 5.14.0-570.146.1.el9_6, +6 more
    fixed: vendor fix RHSA-2026:74174
  • Red Hat Enterprise Linux RT (v. 8) kernel-rt 4.18.0-553.158.1.rt7.499.el8_10, kernel-rt-core 4.18.0-553.158.1.rt7.499.el8_10, kernel-rt-modules 4.18.0-553.158.1.rt7.499.el8_10, kernel-rt-debug-core 4.18.0-553.158.1.rt7.499.el8_10, kernel-rt-debug-modules 4.18.0-553.158.1.rt7.499.el8_10, kernel-rt-modules-extra 4.18.0-553.158.1.rt7.499.el8_10, +2 more
    fixed: vendor fix RHSA-2026:59737
  • Red Hat Enterprise Linux 6 perf, kernel, python-perf, kernel-kdump, kernel-firmware, kernel-bootwrapper, +1 more
    not affected: vulnerable code not present

1 more not affected in the full advisory

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 SSVC

Exploitation
none
Automatable
yes
Technical impact
total
Assessed
24 d ago

Exploit prediction

0.66% chance of exploitation in the next 30 days, higher than 51% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by version score vector
CNA 3.1 9.8 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
CISA ADP 3.1 8.8 CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
CNA 3.1 8.8 CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Affected products

  • Linux Linux
  • Red Hat Red Hat Enterprise Linux 8
  • Red Hat Red Hat Enterprise Linux 9
  • Red Hat Red Hat Enterprise Linux 10
  • Red Hat Red Hat Enterprise Linux 6
  • Red Hat Red Hat Enterprise Linux 7

Classification

Weakness
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.