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Fencer Vulns
high 7.5

CVE-2025-40240 json

sctp: avoid NULL dereference when chunk data buffer is missing

published 2025-12-04 11 mo ago modified 2026-10-19 20 d ago also EUVD-2025-201219

cvss
7.5
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
0.6%
EPSS 0.6% 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: avoid NULL dereference when chunk data buffer is missing

chunk->skb pointer is dereferenced in the if-block where it's supposed to be NULL only.

chunk->skb can only be NULL if chunk->head_skb is not. Check for frag_list instead and do it just before replacing chunk->skb. We're sure that otherwise chunk->skb is non-NULL because of outer if() condition.

Patch / fix

  • Linux Linux 5.4.301, 5.10.246, 5.15.196, 6.1.158, 6.6.115, 6.12.56, 6.17.6, 6.18
  • linux Debian 12 6.1.158-1
  • linux Debian 13 6.12.57-1
  • linux Debian 14 6.17.6-1

debian advisories DEBIAN-CVE-2025-40240

  • linux Ubuntu 22.04 LTS 5.15.0-170.180
  • linux Ubuntu 24.04 LTS 6.8.0-106.106
  • linux Ubuntu 25.10 6.17.0-14.14
  • linux-aws Ubuntu 22.04 LTS 5.15.0-1100.107
  • linux-aws Ubuntu 24.04 LTS 6.8.0-1050.53
  • linux-aws Ubuntu 25.10 6.17.0-1007.7
  • linux-gcp Ubuntu 22.04 LTS 5.15.0-1100.109
  • linux-gcp Ubuntu 24.04 LTS 6.8.0-1052.55

ubuntu advisories UBUNTU-CVE-2025-40240

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 10.1 6.12.0-124.27.1.el10_1
  • rv RHEL 10.1 6.12.0-124.27.1.el10_1
  • perf RHEL 10.1 6.12.0-124.27.1.el10_1
  • rtla RHEL 10.1 6.12.0-124.27.1.el10_1
  • libperf RHEL 10.1 6.12.0-124.27.1.el10_1
  • kernel-rt RHEL 10.1 6.12.0-124.27.1.el10_1
  • kernel-64k RHEL 10.1 6.12.0-124.27.1.el10_1
  • kernel-core RHEL 10.1 6.12.0-124.27.1.el10_1

red hat advisories RHSA-2026:14925RHSA-2026:14869RHSA-2026:7003RHSA-2026:5813RHSA-2026:5732RHSA-2026:5727

  • kernel-rt Linux Micro 6.1, Linux Micro 6.0 6.4.0-40.1
  • kernel-source-rt Linux Micro 6.1, Linux Micro 6.0 6.4.0-40.1
  • kernel-source Linux Micro 6.1, Linux Micro 6.0 6.4.0-39.1
  • kernel-default Linux Micro 6.1, Linux Micro 6.0 6.4.0-39.1
  • kernel-kvmsmall Linux Micro 6.1, Linux Micro 6.0 6.4.0-39.1
  • kernel-default-base Linux Micro 6.1, Linux Micro 6.0 6.4.0-39.1.21.16
  • kernel-rt Linux Micro 6.2 6.12.0-160000.9.1
  • kernel-64kb SLES 16.0, Linux Micro 6.2, SLES for SAP applications 16.0 6.12.0-160000.9.1

suse advisories SUSE-SU-2026:20845-1SUSE-SU-2026:20876-1SUSE-SU-2026:20477-1SUSE-SU-2026:20498-1SUSE-SU-2026:20207-1SUSE-SU-2026:20220-1

  • kernel-rt openSUSE Leap 16.0 6.12.0-160000.9.1
  • dtb-aarch64 openSUSE Leap 16.0 6.12.0-160000.9.1
  • kernel-64kb openSUSE Leap 16.0 6.12.0-160000.9.1
  • kernel-syms openSUSE Leap 16.0 6.12.0-160000.9.1
  • kernel-azure openSUSE Leap 16.0 6.12.0-160000.9.1
  • kernel-obs-qa openSUSE Leap 16.0 6.12.0-160000.9.1
  • kernel-source openSUSE Leap 16.0 6.12.0-160000.9.1
  • kernel-default openSUSE Leap 16.0 6.12.0-160000.9.1

opensuse advisories openSUSE-SU-2026:20145-1

  • kernel-rt AlmaLinux 8 4.18.0-553.92.1.rt7.433.el8_10
  • kernel-rt-core AlmaLinux 8 4.18.0-553.92.1.rt7.433.el8_10
  • kernel-rt-modules AlmaLinux 8 4.18.0-553.92.1.rt7.433.el8_10
  • kernel-rt-debug-core AlmaLinux 8 4.18.0-553.92.1.rt7.433.el8_10
  • kernel-rt-debug-modules AlmaLinux 8 4.18.0-553.92.1.rt7.433.el8_10
  • kernel-rt-modules-extra AlmaLinux 8 4.18.0-553.92.1.rt7.433.el8_10
  • kernel-rt-debug-modules-extra AlmaLinux 8 4.18.0-553.92.1.rt7.433.el8_10
  • kernel AlmaLinux 8 4.18.0-553.92.1.el8_10

almalinux advisories ALSA-2026:0443ALSA-2026:0444ALSA-2026:0445ALSA-2026:0453

  • kernel Rocky Linux 10 6.12.0-124.27.1.el10_1
  • kernel Rocky Linux 9 5.14.0-611.20.1.el9_7
  • kernel-rt Rocky Linux 8 4.18.0-553.92.1.rt7.433.el8_10
  • kernel Rocky Linux 8 4.18.0-553.92.1.el8_10

rocky linux advisories RLSA-2026:0453RLSA-2026:0445RLSA-2026:0443RLSA-2026:0444

  • kernel Azure Linux 3.0 6.6.117.1-1

azure linux advisories AZL-71375

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-2025-40240 updated cvss 7.5

kernel: sctp: avoid NULL dereference when chunk data buffer is missing

  • 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 “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.”
  • Red Hat CodeReady Linux Builder EUS (v.9.4) libperf 5.14.0-427.115.1.el9_4, kernel-debuginfo-common-s390x 5.14.0-427.115.1.el9_4, kernel-debuginfo-common-x86_64 5.14.0-427.115.1.el9_4, kernel-debuginfo-common-aarch64 5.14.0-427.115.1.el9_4, kernel-debuginfo-common-ppc64le 5.14.0-427.115.1.el9_4
    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-2026:4899
  • Red Hat CodeReady Linux Builder EUS (v.9.6) libperf 5.14.0-570.98.1.el9_6, kernel-debuginfo-common-s390x 5.14.0-570.98.1.el9_6, kernel-debuginfo-common-x86_64 5.14.0-570.98.1.el9_6, kernel-debuginfo-common-aarch64 5.14.0-570.98.1.el9_6, kernel-debuginfo-common-ppc64le 5.14.0-570.98.1.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-2026:4745
  • Red Hat Enterprise Linux AppStream (v. 9) rv 5.14.0-611.20.1.el9_7, perf 5.14.0-611.20.1.el9_7, rtla 5.14.0-611.20.1.el9_7, python3-perf 5.14.0-611.20.1.el9_7, kernel-devel-matched 5.14.0-611.20.1.el9_7, kernel-64k-devel-matched 5.14.0-611.20.1.el9_7, +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-2026:0445
  • Red Hat Enterprise Linux AppStream (v. 10) rv 6.12.0-124.27.1.el10_1, perf 6.12.0-124.27.1.el10_1, rtla 6.12.0-124.27.1.el10_1, python3-perf 6.12.0-124.27.1.el10_1, kernel-devel-matched 6.12.0-124.27.1.el10_1, kernel-64k-devel-matched 6.12.0-124.27.1.el10_1, +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-2026:0453
  • Red Hat Enterprise Linux AppStream E4S (v.9.0) perf 5.14.0-70.171.1.el9_0, kernel-devel-matched 5.14.0-70.171.1.el9_0, kernel-debug-devel-matched 5.14.0-70.171.1.el9_0, kernel-debuginfo-common-s390x 5.14.0-70.171.1.el9_0, kernel-zfcpdump-devel-matched 5.14.0-70.171.1.el9_0, kernel-debuginfo-common-x86_64 5.14.0-70.171.1.el9_0, +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-2026:5693
  • Red Hat Enterprise Linux AppStream E4S (v.9.2) perf 5.14.0-284.161.1.el9_2, rtla 5.14.0-284.161.1.el9_2, kernel-devel-matched 5.14.0-284.161.1.el9_2, kernel-64k-devel-matched 5.14.0-284.161.1.el9_2, kernel-debug-devel-matched 5.14.0-284.161.1.el9_2, kernel-debuginfo-common-s390x 5.14.0-284.161.1.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-2026:5813
  • Red Hat Enterprise Linux AppStream EUS (v. 10.0) rv 6.12.0-55.58.1.el10_0, perf 6.12.0-55.58.1.el10_0, rtla 6.12.0-55.58.1.el10_0, python3-perf 6.12.0-55.58.1.el10_0, kernel-devel-matched 6.12.0-55.58.1.el10_0, kernel-64k-devel-matched 6.12.0-55.58.1.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-2026:1727
show 31 more
  • Red Hat Enterprise Linux AppStream EUS (v.9.4) rv 5.14.0-427.115.1.el9_4, perf 5.14.0-427.115.1.el9_4, rtla 5.14.0-427.115.1.el9_4, kernel-devel-matched 5.14.0-427.115.1.el9_4, kernel-64k-devel-matched 5.14.0-427.115.1.el9_4, kernel-debug-devel-matched 5.14.0-427.115.1.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-2026:4899
  • Red Hat Enterprise Linux AppStream EUS (v.9.6) rv 5.14.0-570.98.1.el9_6, perf 5.14.0-570.98.1.el9_6, rtla 5.14.0-570.98.1.el9_6, python3-perf 5.14.0-570.98.1.el9_6, kernel-devel-matched 5.14.0-570.98.1.el9_6, kernel-64k-devel-matched 5.14.0-570.98.1.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-2026:4745
  • Red Hat Enterprise Linux BaseOS (v. 8) perf 4.18.0-553.92.1.el8_10, kernel 4.18.0-553.92.1.el8_10, bpftool 4.18.0-553.92.1.el8_10, kernel-core 4.18.0-553.92.1.el8_10, kernel-tools 4.18.0-553.92.1.el8_10, python3-perf 4.18.0-553.92.1.el8_10, +11 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-2026:0444
  • Red Hat Enterprise Linux BaseOS (v. 9) kernel 5.14.0-611.20.1.el9_7, kernel-64k 5.14.0-611.20.1.el9_7, kernel-core 5.14.0-611.20.1.el9_7, kernel-tools 5.14.0-611.20.1.el9_7, kernel-modules 5.14.0-611.20.1.el9_7, kernel-64k-core 5.14.0-611.20.1.el9_7, +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-2026:0445
  • Red Hat Enterprise Linux BaseOS (v. 10) kernel 6.12.0-124.27.1.el10_1, kernel-64k 6.12.0-124.27.1.el10_1, kernel-core 6.12.0-124.27.1.el10_1, kernel-tools 6.12.0-124.27.1.el10_1, kernel-modules 6.12.0-124.27.1.el10_1, kernel-64k-core 6.12.0-124.27.1.el10_1, +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-2026:0453
  • Red Hat Enterprise Linux BaseOS AUS (v. 8.2) perf 4.18.0-193.190.1.el8_2, kernel 4.18.0-193.190.1.el8_2, bpftool 4.18.0-193.190.1.el8_2, kernel-core 4.18.0-193.190.1.el8_2, kernel-tools 4.18.0-193.190.1.el8_2, python3-perf 4.18.0-193.190.1.el8_2, +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-2026:5727
  • Red Hat Enterprise Linux BaseOS AUS (v.8.4) perf 4.18.0-305.188.1.el8_4, kernel 4.18.0-305.188.1.el8_4, bpftool 4.18.0-305.188.1.el8_4, kernel-core 4.18.0-305.188.1.el8_4, kernel-tools 4.18.0-305.188.1.el8_4, python3-perf 4.18.0-305.188.1.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-2026:7003
  • Red Hat Enterprise Linux BaseOS AUS (v.8.6) perf 4.18.0-372.185.1.el8_6, kernel 4.18.0-372.185.1.el8_6, bpftool 4.18.0-372.185.1.el8_6, kernel-core 4.18.0-372.185.1.el8_6, kernel-tools 4.18.0-372.185.1.el8_6, python3-perf 4.18.0-372.185.1.el8_6, +8 more Red Hat Enterprise Linux BaseOS E4S (v.8.6) perf 4.18.0-372.185.1.el8_6, kernel 4.18.0-372.185.1.el8_6, bpftool 4.18.0-372.185.1.el8_6, kernel-core 4.18.0-372.185.1.el8_6, kernel-tools 4.18.0-372.185.1.el8_6, python3-perf 4.18.0-372.185.1.el8_6, +15 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-2026:5691
  • Red Hat Enterprise Linux BaseOS E4S (v.8.8) perf 4.18.0-477.128.1.el8_8, kernel 4.18.0-477.128.1.el8_8, bpftool 4.18.0-477.128.1.el8_8, kernel-core 4.18.0-477.128.1.el8_8, kernel-tools 4.18.0-477.128.1.el8_8, python3-perf 4.18.0-477.128.1.el8_8, +9 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-2026:2535
  • Red Hat Enterprise Linux BaseOS E4S (v.9.0) kernel 5.14.0-70.171.1.el9_0, bpftool 5.14.0-70.171.1.el9_0, kernel-core 5.14.0-70.171.1.el9_0, kernel-tools 5.14.0-70.171.1.el9_0, python3-perf 5.14.0-70.171.1.el9_0, kernel-modules 5.14.0-70.171.1.el9_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-2026:5693
  • Red Hat Enterprise Linux BaseOS E4S (v.9.2) bpftool 7.0.0-284.161.1.el9_2, kernel 5.14.0-284.161.1.el9_2, kernel-64k 5.14.0-284.161.1.el9_2, kernel-core 5.14.0-284.161.1.el9_2, kernel-tools 5.14.0-284.161.1.el9_2, python3-perf 5.14.0-284.161.1.el9_2, +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-2026:5813
  • Red Hat Enterprise Linux BaseOS EUS (v. 10.0) kernel 6.12.0-55.58.1.el10_0, kernel-64k 6.12.0-55.58.1.el10_0, kernel-core 6.12.0-55.58.1.el10_0, kernel-tools 6.12.0-55.58.1.el10_0, kernel-modules 6.12.0-55.58.1.el10_0, kernel-64k-core 6.12.0-55.58.1.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-2026:1727
  • Red Hat Enterprise Linux BaseOS EUS (v.9.4) bpftool 7.3.0-427.115.1.el9_4, kernel 5.14.0-427.115.1.el9_4, kernel-64k 5.14.0-427.115.1.el9_4, kernel-core 5.14.0-427.115.1.el9_4, kernel-tools 5.14.0-427.115.1.el9_4, python3-perf 5.14.0-427.115.1.el9_4, +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-2026:4899
  • Red Hat Enterprise Linux BaseOS EUS (v.9.6) kernel 5.14.0-570.98.1.el9_6, kernel-64k 5.14.0-570.98.1.el9_6, kernel-core 5.14.0-570.98.1.el9_6, kernel-tools 5.14.0-570.98.1.el9_6, kernel-modules 5.14.0-570.98.1.el9_6, kernel-64k-core 5.14.0-570.98.1.el9_6, +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-2026:4745
  • Red Hat Enterprise Linux BaseOS EUS EXTENSION (v.8.4) perf 4.18.0-305.188.1.el8_4, kernel 4.18.0-305.188.1.el8_4, bpftool 4.18.0-305.188.1.el8_4, kernel-core 4.18.0-305.188.1.el8_4, kernel-tools 4.18.0-305.188.1.el8_4, python3-perf 4.18.0-305.188.1.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-2026:7003
  • Red Hat Enterprise Linux BaseOS TUS (v.8.6) perf 4.18.0-372.185.1.el8_6, kernel 4.18.0-372.185.1.el8_6, bpftool 4.18.0-372.185.1.el8_6, kernel-core 4.18.0-372.185.1.el8_6, kernel-tools 4.18.0-372.185.1.el8_6, python3-perf 4.18.0-372.185.1.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-2026:5691
  • Red Hat Enterprise Linux BaseOS TUS (v.8.8) perf 4.18.0-477.128.1.el8_8, kernel 4.18.0-477.128.1.el8_8, bpftool 4.18.0-477.128.1.el8_8, kernel-core 4.18.0-477.128.1.el8_8, kernel-tools 4.18.0-477.128.1.el8_8, python3-perf 4.18.0-477.128.1.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-2026:2535
  • Red Hat Enterprise Linux CodeReady Linux Builder (v. 9) libperf 5.14.0-611.20.1.el9_7, kernel-debuginfo-common-s390x 5.14.0-611.20.1.el9_7, kernel-debuginfo-common-x86_64 5.14.0-611.20.1.el9_7, kernel-debuginfo-common-aarch64 5.14.0-611.20.1.el9_7, kernel-debuginfo-common-ppc64le 5.14.0-611.20.1.el9_7
    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-2026:0445
  • Red Hat Enterprise Linux CodeReady Linux Builder (v. 10) libperf 6.12.0-124.27.1.el10_1, kernel-debuginfo-common-s390x 6.12.0-124.27.1.el10_1, kernel-debuginfo-common-x86_64 6.12.0-124.27.1.el10_1, kernel-debuginfo-common-aarch64 6.12.0-124.27.1.el10_1, kernel-debuginfo-common-ppc64le 6.12.0-124.27.1.el10_1
    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-2026:0453
  • Red Hat Enterprise Linux CodeReady Linux Builder EUS (v. 10.0) libperf 6.12.0-55.58.1.el10_0, kernel-debuginfo-common-s390x 6.12.0-55.58.1.el10_0, kernel-debuginfo-common-x86_64 6.12.0-55.58.1.el10_0, kernel-debuginfo-common-aarch64 6.12.0-55.58.1.el10_0, kernel-debuginfo-common-ppc64le 6.12.0-55.58.1.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-2026:1727
  • Red Hat Enterprise Linux CRB (v. 8) kernel-tools-libs-devel 4.18.0-553.92.1.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-2026:0444
  • Red Hat Enterprise Linux for Real Time (v. 7 ELS) kernel-rt 3.10.0-1160.149.1.rt56.1301.el7, kernel-rt-trace 3.10.0-1160.149.1.rt56.1301.el7, kernel-rt-debuginfo-common-x86_64 3.10.0-1160.149.1.rt56.1301.el7
    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-2026:14869
  • Red Hat Enterprise Linux NFV (v. 8) kernel-rt 4.18.0-553.92.1.rt7.433.el8_10, kernel-rt-kvm 4.18.0-553.92.1.rt7.433.el8_10, kernel-rt-core 4.18.0-553.92.1.rt7.433.el8_10, kernel-rt-modules 4.18.0-553.92.1.rt7.433.el8_10, kernel-rt-debug-kvm 4.18.0-553.92.1.rt7.433.el8_10, kernel-rt-debug-core 4.18.0-553.92.1.rt7.433.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-2026:0443
  • Red Hat Enterprise Linux NFV E4S (v.9.0) kernel-rt 5.14.0-70.171.1.rt21.243.el9_0, kernel-rt-kvm 5.14.0-70.171.1.rt21.243.el9_0, kernel-rt-core 5.14.0-70.171.1.rt21.243.el9_0, kernel-rt-modules 5.14.0-70.171.1.rt21.243.el9_0, kernel-rt-debug-kvm 5.14.0-70.171.1.rt21.243.el9_0, kernel-rt-debug-core 5.14.0-70.171.1.rt21.243.el9_0, +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-2026:5732
  • Red Hat Enterprise Linux Real Time (v. 9) kernel-rt 5.14.0-611.20.1.el9_7, kernel-rt-64k 5.14.0-611.20.1.el9_7, kernel-rt-core 5.14.0-611.20.1.el9_7, kernel-rt-modules 5.14.0-611.20.1.el9_7, kernel-rt-64k-core 5.14.0-611.20.1.el9_7, kernel-rt-debug-core 5.14.0-611.20.1.el9_7, +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-2026:0445
  • Red Hat Enterprise Linux Real Time (v. 10) kernel-rt 6.12.0-124.27.1.el10_1, kernel-rt-64k 6.12.0-124.27.1.el10_1, kernel-rt-core 6.12.0-124.27.1.el10_1, kernel-rt-modules 6.12.0-124.27.1.el10_1, kernel-rt-64k-core 6.12.0-124.27.1.el10_1, kernel-rt-debug-core 6.12.0-124.27.1.el10_1, +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-2026:0453
  • Red Hat Enterprise Linux Real Time E4S (v.9.0) kernel-rt 5.14.0-70.171.1.rt21.243.el9_0, kernel-rt-core 5.14.0-70.171.1.rt21.243.el9_0, kernel-rt-modules 5.14.0-70.171.1.rt21.243.el9_0, kernel-rt-debug-core 5.14.0-70.171.1.rt21.243.el9_0, kernel-rt-debug-modules 5.14.0-70.171.1.rt21.243.el9_0, kernel-rt-modules-extra 5.14.0-70.171.1.rt21.243.el9_0, +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-2026:5732
  • Red Hat Enterprise Linux Real Time E4S (v.9.2) kernel-rt 5.14.0-284.161.1.rt14.446.el9_2, kernel-rt-core 5.14.0-284.161.1.rt14.446.el9_2, kernel-rt-modules 5.14.0-284.161.1.rt14.446.el9_2, kernel-rt-debug-core 5.14.0-284.161.1.rt14.446.el9_2, kernel-rt-modules-core 5.14.0-284.161.1.rt14.446.el9_2, kernel-rt-debug-modules 5.14.0-284.161.1.rt14.446.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-2026:5690
  • Red Hat Enterprise Linux Real Time EUS (v. 10.0) kernel-rt 6.12.0-55.58.1.el10_0, kernel-rt-64k 6.12.0-55.58.1.el10_0, kernel-rt-core 6.12.0-55.58.1.el10_0, kernel-rt-modules 6.12.0-55.58.1.el10_0, kernel-rt-64k-core 6.12.0-55.58.1.el10_0, kernel-rt-debug-core 6.12.0-55.58.1.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-2026:1727
  • Red Hat Enterprise Linux Real Time EUS (v.9.4) kernel-rt 5.14.0-427.115.1.el9_4, kernel-rt-core 5.14.0-427.115.1.el9_4, kernel-rt-modules 5.14.0-427.115.1.el9_4, kernel-rt-debug-core 5.14.0-427.115.1.el9_4, kernel-rt-modules-core 5.14.0-427.115.1.el9_4, kernel-rt-debug-modules 5.14.0-427.115.1.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-2026:4899
  • Red Hat Enterprise Linux Real Time EUS (v.9.6) kernel-rt 5.14.0-570.98.1.el9_6, kernel-rt-64k 5.14.0-570.98.1.el9_6, kernel-rt-core 5.14.0-570.98.1.el9_6, kernel-rt-modules 5.14.0-570.98.1.el9_6, kernel-rt-64k-core 5.14.0-570.98.1.el9_6, kernel-rt-debug-core 5.14.0-570.98.1.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-2026:4745

9 more fixed, 3 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
no
Technical impact
partial
Assessed
4 mo ago

Exploit prediction

0.64% 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 7.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Affected products

  • Linux Linux

Classification

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.