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Fencer Vulns
high 7.8

CVE-2026-43116 json

netfilter: ctnetlink: ensure safe access to master conntrack

published 2026-05-06 6 mo ago modified 2026-10-19 20 d ago also EUVD-2026-27641

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 0%
public exploits
0
none known

Summary

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

netfilter: ctnetlink: ensure safe access to master conntrack

Holding reference on the expectation is not sufficient, the master conntrack object can just go away, making exp->master invalid.

To access exp->master safely:

- Grab the nf_conntrack_expect_lock, this gets serialized with clean_from_lists() which also holds this lock when the master conntrack goes away.

- Hold reference on master conntrack via nf_conntrack_find_get(). Not so easy since the master tuple to look up for the master conntrack is not available in the existing problematic paths.

This patch goes for extending the nf_conntrack_expect_lock section to address this issue for simplicity, in the cases that are described below this is just slightly extending the lock section.

The add expectation command already holds a reference to the master conntrack from ctnetlink_create_expect().

However, the delete expectation command needs to grab the spinlock before looking up for the expectation. Expand the existing spinlock section to address this to cover the expectation lookup. Note that, the nf_ct_expect_iterate_net() calls already grabs the spinlock while iterating over the expectation table, which is correct.

The get expectation command needs to grab the spinlock to ensure master conntrack does not go away. This also expands the existing spinlock section to cover the expectation lookup too. I needed to move the netlink skb allocation out of the spinlock to keep it GFP_KERNEL.

For the expectation events, the IPEXP_DESTROY event is already delivered under the spinlock, just move the delivery of IPEXP_NEW under the spinlock too because the master conntrack event cache is reached through exp->master.

While at it, add lockdep notations to help identify what codepaths need to grab the spinlock.

Patch / fix

  • Linux Linux 6.1.176, 6.6.143, 6.12.94, 6.18.24, 6.19.14, 7.0
  • linux Debian 12 6.1.176-1
  • linux Debian 13 6.12.94-1
  • linux Debian 14 6.19.14-1

debian advisories DEBIAN-CVE-2026-43116

  • linux Ubuntu 24.04 LTS 6.8.0-146.146
  • linux-aws Ubuntu 24.04 LTS 6.8.0-1066.69
  • linux-gcp Ubuntu 24.04 LTS 6.8.0-1070.78
  • linux-gke Ubuntu 24.04 LTS 6.8.0-1065.73
  • linux-ibm Ubuntu 24.04 LTS 6.8.0-1066.67
  • linux-azure Ubuntu 24.04 LTS 6.8.0-1070.78
  • linux-gkeop Ubuntu 24.04 LTS 6.8.0-1051.55
  • linux-nvidia Ubuntu 24.04 LTS 6.8.0-1064.67

ubuntu advisories UBUNTU-CVE-2026-43116

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 8 4.18.0-553.150.1.el8_10
  • perf RHEL 8 4.18.0-553.150.1.el8_10
  • bpftool RHEL 8 4.18.0-553.150.1.el8_10
  • kernel-core RHEL 8 4.18.0-553.150.1.el8_10
  • kernel-tools RHEL 8 4.18.0-553.150.1.el8_10
  • python3-perf RHEL 8 4.18.0-553.150.1.el8_10
  • kernel-modules RHEL 8 4.18.0-553.150.1.el8_10
  • kernel-zfcpdump RHEL 8 4.18.0-553.150.1.el8_10

red hat advisories RHSA-2026:63189RHSA-2026:61692RHSA-2026:49214RHSA-2026:49213RHSA-2026:27735RHSA-2026:27731

  • kernel-64kb SLE Module for Basesystem 15 SP7 6.4.0-150700.53.81.1
  • kernel-syms SLE Module for Development Tools 15 SP7 6.4.0-150700.53.81.1
  • kernel-azure SLE Module for Public Cloud 15 SP7 6.4.0-150700.53.81.1
  • kernel-source SLE Module for Development Tools 15 SP7, SLE Module for Basesystem 15 SP7 6.4.0-150700.53.81.1
  • kernel-default SLE Workstation Extension 15 SP7, SLE Module for Legacy 15 SP7, SLE Module for Basesystem 15 SP7 +2 more 6.4.0-150700.53.81.1
  • kernel-zfcpdump SLE Module for Basesystem 15 SP7 6.4.0-150700.53.81.1
  • kernel-obs-build SLE Module for Development Tools 15 SP7 6.4.0-150700.53.81.1
  • kernel-default-base SLE Module for Basesystem 15 SP7 6.4.0-150700.53.81.1.150700.17.45.1

suse advisories SUSE-SU-2026:4254-1SUSE-SU-2026:23887-1SUSE-SU-2026:23902-1SUSE-SU-2026:23897-1SUSE-SU-2026:23881-1SUSE-SU-2026:4282-1

  • kernel-rt openSUSE Leap 16.0 6.12.0-160000.38.1
  • dtb-aarch64 openSUSE Leap 16.0 6.12.0-160000.38.1
  • kernel-64kb openSUSE Leap 16.0 6.12.0-160000.38.1
  • kernel-syms openSUSE Leap 16.0 6.12.0-160000.38.1
  • kernel-azure openSUSE Leap 16.0 6.12.0-160000.38.1
  • kernel-obs-qa openSUSE Leap 16.0 6.12.0-160000.38.1
  • kernel-source openSUSE Leap 16.0 6.12.0-160000.38.1
  • kernel-default openSUSE Leap 16.0 6.12.0-160000.38.1

opensuse advisories openSUSE-SU-2026:21910-1

  • kernel-rt AlmaLinux 8 4.18.0-553.150.1.rt7.491.el8_10
  • kernel-rt-core AlmaLinux 8 4.18.0-553.150.1.rt7.491.el8_10
  • kernel-rt-modules AlmaLinux 8 4.18.0-553.150.1.rt7.491.el8_10
  • kernel-rt-debug-core AlmaLinux 8 4.18.0-553.150.1.rt7.491.el8_10
  • kernel-rt-debug-modules AlmaLinux 8 4.18.0-553.150.1.rt7.491.el8_10
  • kernel-rt-modules-extra AlmaLinux 8 4.18.0-553.150.1.rt7.491.el8_10
  • kernel-rt-debug-modules-extra AlmaLinux 8 4.18.0-553.150.1.rt7.491.el8_10
  • kernel AlmaLinux 8 4.18.0-553.150.1.el8_10

almalinux advisories ALSA-2026:49213ALSA-2026:49214ALSA-2026:25217ALSA-2026:21557

  • kernel-rt Rocky Linux 8 4.18.0-553.150.1.rt7.491.el8_10
  • kernel Rocky Linux 8 4.18.0-553.150.1.el8_10
  • kernel Rocky Linux 9 5.14.0-687.15.1.el9_7.cloud.1.0
  • kernel Rocky Linux 9 5.14.0-687.15.1.el9_8
  • kernel Rocky Linux 10 6.12.0-211.18.1.el10_2

rocky linux advisories RLSA-2026:49213RLSA-2026:49214RXSA-2026:25217RLSA-2026:25217RLSA-2026:21557

  • kernel Azure Linux 3.0 6.6.143.1-1

azure linux advisories AZL-85851

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-2026-43116 updated cvss 7.0

kernel: netfilter: ctnetlink: ensure safe access to master conntrack

  • Red Hat Enterprise Linux 6 perf, kernel, python-perf, kernel-kdump, kernel-firmware, kernel-bootwrapper, +1 more
    affected: workaround, no fix planned “Out of support scope”
  • 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 5.14.0-570.123.1.el9_6, kernel-debuginfo-common-s390x 5.14.0-570.123.1.el9_6, kernel-debuginfo-common-x86_64 5.14.0-570.123.1.el9_6, kernel-debuginfo-common-aarch64 5.14.0-570.123.1.el9_6, kernel-debuginfo-common-ppc64le 5.14.0-570.123.1.el9_6
    fixed: vendor fix RHSA-2026:27708
  • Red Hat Enterprise Linux AppStream (v. 9) rv 5.14.0-687.15.1.el9_8, perf 5.14.0-687.15.1.el9_8, rtla 5.14.0-687.15.1.el9_8, python3-perf 5.14.0-687.15.1.el9_8, kernel-devel-matched 5.14.0-687.15.1.el9_8, kernel-64k-devel-matched 5.14.0-687.15.1.el9_8, +7 more
    fixed: vendor fix RHSA-2026:25217
  • Red Hat Enterprise Linux AppStream (v. 10) rv 6.12.0-211.18.1.el10_2, perf 6.12.0-211.18.1.el10_2, rtla 6.12.0-211.18.1.el10_2, python3-perf 6.12.0-211.18.1.el10_2, kernel-devel-matched 6.12.0-211.18.1.el10_2, kernel-64k-devel-matched 6.12.0-211.18.1.el10_2, +7 more
    fixed: vendor fix RHSA-2026:21557
  • 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 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 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 RHSA-2026:27731
show 32 more
  • Red Hat Enterprise Linux AppStream EUS (v.9.6) rv 5.14.0-570.123.1.el9_6, perf 5.14.0-570.123.1.el9_6, rtla 5.14.0-570.123.1.el9_6, python3-perf 5.14.0-570.123.1.el9_6, kernel-devel-matched 5.14.0-570.123.1.el9_6, kernel-64k-devel-matched 5.14.0-570.123.1.el9_6, +7 more
    fixed: vendor fix RHSA-2026:27708
  • Red Hat Enterprise Linux BaseOS (v. 8) perf 4.18.0-553.150.1.el8_10, kernel 4.18.0-553.150.1.el8_10, bpftool 4.18.0-553.150.1.el8_10, kernel-core 4.18.0-553.150.1.el8_10, kernel-tools 4.18.0-553.150.1.el8_10, python3-perf 4.18.0-553.150.1.el8_10, +15 more
    fixed: vendor fix RHSA-2026:49214
  • Red Hat Enterprise Linux BaseOS (v. 9) kernel 5.14.0-687.15.1.el9_8, kernel-64k 5.14.0-687.15.1.el9_8, kernel-core 5.14.0-687.15.1.el9_8, kernel-tools 5.14.0-687.15.1.el9_8, kernel-modules 5.14.0-687.15.1.el9_8, kernel-64k-core 5.14.0-687.15.1.el9_8, +27 more
    fixed: vendor fix RHSA-2026:25217
  • Red Hat Enterprise Linux BaseOS (v. 10) kernel 6.12.0-211.18.1.el10_2, kernel-64k 6.12.0-211.18.1.el10_2, kernel-core 6.12.0-211.18.1.el10_2, kernel-tools 6.12.0-211.18.1.el10_2, kernel-modules 6.12.0-211.18.1.el10_2, kernel-64k-core 6.12.0-211.18.1.el10_2, +28 more
    fixed: vendor fix RHSA-2026:21557
  • 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 RHSA-2026:26535
  • Red Hat Enterprise Linux BaseOS AUS (v.8.6) perf 4.18.0-372.196.1.el8_6, kernel 4.18.0-372.196.1.el8_6, bpftool 4.18.0-372.196.1.el8_6, kernel-core 4.18.0-372.196.1.el8_6, kernel-tools 4.18.0-372.196.1.el8_6, python3-perf 4.18.0-372.196.1.el8_6, +8 more
    fixed: vendor fix RHSA-2026:26570
  • 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, +9 more
    fixed: vendor fix 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, +28 more
    fixed: vendor fix 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, +28 more
    fixed: vendor fix 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 RHSA-2026:27731
  • Red Hat Enterprise Linux BaseOS EUS (v.9.6) kernel 5.14.0-570.123.1.el9_6, kernel-64k 5.14.0-570.123.1.el9_6, kernel-core 5.14.0-570.123.1.el9_6, kernel-tools 5.14.0-570.123.1.el9_6, kernel-modules 5.14.0-570.123.1.el9_6, kernel-64k-core 5.14.0-570.123.1.el9_6, +27 more
    fixed: vendor fix RHSA-2026:27708
  • 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 RHSA-2026:26535
  • Red Hat Enterprise Linux BaseOS EUS EXTENSION (v.8.6) perf 4.18.0-372.196.1.el8_6, kernel 4.18.0-372.196.1.el8_6, bpftool 4.18.0-372.196.1.el8_6, kernel-core 4.18.0-372.196.1.el8_6, kernel-tools 4.18.0-372.196.1.el8_6, python3-perf 4.18.0-372.196.1.el8_6, +8 more
    fixed: vendor fix RHSA-2026:26570
  • 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 RHSA-2026:26563
  • Red Hat Enterprise Linux CodeReady Linux Builder (v. 9) libperf 5.14.0-687.15.1.el9_8, kernel-debuginfo-common-s390x 5.14.0-687.15.1.el9_8, kernel-debuginfo-common-x86_64 5.14.0-687.15.1.el9_8, kernel-debuginfo-common-aarch64 5.14.0-687.15.1.el9_8, kernel-debuginfo-common-ppc64le 5.14.0-687.15.1.el9_8
    fixed: vendor fix RHSA-2026:25217
  • Red Hat Enterprise Linux CodeReady Linux Builder (v. 10) libperf 6.12.0-211.18.1.el10_2, kernel-debuginfo-common-s390x 6.12.0-211.18.1.el10_2, kernel-debuginfo-common-x86_64 6.12.0-211.18.1.el10_2, kernel-debuginfo-common-aarch64 6.12.0-211.18.1.el10_2, kernel-debuginfo-common-ppc64le 6.12.0-211.18.1.el10_2
    fixed: vendor fix RHSA-2026:21557
  • 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 RHSA-2026:27731
  • Red Hat Enterprise Linux CRB (v. 8) kernel-debuginfo-common-x86_64 4.18.0-553.150.1.el8_10, kernel-debuginfo-common-aarch64 4.18.0-553.150.1.el8_10, kernel-debuginfo-common-ppc64le 4.18.0-553.150.1.el8_10
    fixed: vendor fix RHSA-2026:49214
  • Red Hat Enterprise Linux for Real Time (v. 7 ELS) kernel-rt 3.10.0-1160.159.1.rt56.1311.el7, kernel-rt-trace 3.10.0-1160.159.1.rt56.1311.el7, kernel-rt-debuginfo-common-x86_64 3.10.0-1160.159.1.rt56.1311.el7
    fixed: vendor fix RHSA-2026:63189
  • Red Hat Enterprise Linux NFV (v. 8) kernel-rt 4.18.0-553.150.1.rt7.491.el8_10, kernel-rt-kvm 4.18.0-553.150.1.rt7.491.el8_10, kernel-rt-core 4.18.0-553.150.1.rt7.491.el8_10, kernel-rt-modules 4.18.0-553.150.1.rt7.491.el8_10, kernel-rt-debug-kvm 4.18.0-553.150.1.rt7.491.el8_10, kernel-rt-debug-core 4.18.0-553.150.1.rt7.491.el8_10, +4 more
    fixed: vendor fix RHSA-2026:49213
  • Red Hat Enterprise Linux Real Time (v. 9) kernel-rt 5.14.0-687.15.1.el9_8, kernel-rt-64k 5.14.0-687.15.1.el9_8, kernel-rt-core 5.14.0-687.15.1.el9_8, kernel-rt-modules 5.14.0-687.15.1.el9_8, kernel-rt-64k-core 5.14.0-687.15.1.el9_8, kernel-rt-debug-core 5.14.0-687.15.1.el9_8, +14 more
    fixed: vendor fix RHSA-2026:25217
  • Red Hat Enterprise Linux Real Time (v. 10) kernel-rt 6.12.0-211.18.1.el10_2, kernel-rt-64k 6.12.0-211.18.1.el10_2, kernel-rt-core 6.12.0-211.18.1.el10_2, kernel-rt-modules 6.12.0-211.18.1.el10_2, kernel-rt-64k-core 6.12.0-211.18.1.el10_2, kernel-rt-debug-core 6.12.0-211.18.1.el10_2, +14 more
    fixed: vendor fix RHSA-2026:21557
  • 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 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 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 RHSA-2026:27731
  • Red Hat Enterprise Linux Real Time EUS (v.9.6) kernel-rt 5.14.0-570.123.1.el9_6, kernel-rt-64k 5.14.0-570.123.1.el9_6, kernel-rt-core 5.14.0-570.123.1.el9_6, kernel-rt-modules 5.14.0-570.123.1.el9_6, kernel-rt-64k-core 5.14.0-570.123.1.el9_6, kernel-rt-debug-core 5.14.0-570.123.1.el9_6, +14 more
    fixed: vendor fix RHSA-2026:27708
  • Red Hat Enterprise Linux Real Time for NFV (v. 9) kernel-rt 5.14.0-687.15.1.el9_8, kernel-rt-core 5.14.0-687.15.1.el9_8, kernel-rt-modules 5.14.0-687.15.1.el9_8, kernel-rt-debug-core 5.14.0-687.15.1.el9_8, kernel-rt-modules-core 5.14.0-687.15.1.el9_8, kernel-rt-debug-modules 5.14.0-687.15.1.el9_8, +4 more
    fixed: vendor fix RHSA-2026:25217
  • Red Hat Enterprise Linux Real Time for NFV (v. 10) kernel-rt 6.12.0-211.18.1.el10_2, kernel-rt-core 6.12.0-211.18.1.el10_2, kernel-rt-modules 6.12.0-211.18.1.el10_2, kernel-rt-debug-core 6.12.0-211.18.1.el10_2, kernel-rt-modules-core 6.12.0-211.18.1.el10_2, kernel-rt-debug-modules 6.12.0-211.18.1.el10_2, +4 more
    fixed: vendor fix RHSA-2026:21557
  • 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 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 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 RHSA-2026:27731
  • Red Hat Enterprise Linux Real Time for NFV EUS (v.9.6) kernel-rt 5.14.0-570.123.1.el9_6, kernel-rt-kvm 5.14.0-570.123.1.el9_6, kernel-rt-core 5.14.0-570.123.1.el9_6, kernel-rt-modules 5.14.0-570.123.1.el9_6, kernel-rt-debug-kvm 5.14.0-570.123.1.el9_6, kernel-rt-debug-core 5.14.0-570.123.1.el9_6, +6 more
    fixed: vendor fix RHSA-2026:27708

3 more fixed 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 ICSA-26-295-11 updated cvss 7.8

Siemens SIMATIC S7-1500 CPU 1518(F)-4 PN/DP MFP

  • Siemens SIMATIC S7-1500 CPU 1518-4 PN/DP MFP (6ES7518-4AX00-1AB0) >= 3.1.7 Siemens SIMATIC S7-1500 CPU 1518-4 PN/DP MFP (6ES7518-4AX00-1AC0) >= 3.1.7 Siemens SIMATIC S7-1500 CPU 1518F-4 PN/DP MFP (6ES7518-4FX00-1AB0) >= 3.1.7 Siemens SIMATIC S7-1500 CPU 1518F-4 PN/DP MFP (6ES7518-4FX00-1AC0) >= 3.1.7 Siemens SIPLUS S7-1500 CPU 1518-4 PN/DP MFP (6AG1518-4AX00-4AC0) >= 3.1.7
    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 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
24 d ago

Exploit prediction

0.10% chance of exploitation in the next 30 days, higher than 0% 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

Affected products

  • Linux Linux
  • Siemens SIMATIC S7-1500 CPU 1518-4 PN/DP MFP
  • Siemens SIMATIC S7-1500 CPU 1518F-4 PN/DP MFP
  • Siemens SIMATIC S7-1500 TM MFP - GNU/Linux subsystem
  • Siemens SIPLUS S7-1500 CPU 1518-4 PN/DP MFP

Classification

Weakness
  • CWE-362 Concurrent Execution using Shared Resource with Improper Synchronization
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.