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high 7.8

CVE-2026-43499 json

rtmutex: Use waiter::task instead of current in remove_waiter()

published 5mo ago modified 25d ago also EUVD-2026-31277

cvss
7.8
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
5.4%
EPSS 5.4% chance of exploitation in 30 days, percentile 92%
public exploits
0
none known

Summary

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

rtmutex: Use waiter::task instead of current in remove_waiter()

remove_waiter() is used by the slowlock paths, but it is also used for proxy-lock rollback in rt_mutex_start_proxy_lock() when invoked from futex_requeue().

In the latter case waiter::task is not current, but remove_waiter() operates on current for the dequeue operation. That results in several problems:

1) the rbtree dequeue happens without waiter::task::pi_lock being held

2) the waiter task's pi_blocked_on state is not cleared, which leaves a dangling pointer primed for UAF around.

3) rt_mutex_adjust_prio_chain() operates on the wrong top priority waiter task

Use waiter::task instead of current in all related operations in remove_waiter() to cure those problems.

[ tglx: Fixup rt_mutex_adjust_prio_chain(), add a comment and amend the changelog ]

Patch / fix

  • Linux Linux 5.10.261, 5.15.212, 6.1.175, 6.6.140, 6.12.86, 6.18.27, 7.0.4, 7.1
  • linux Debian 12 6.1.176-1
  • linux Debian 13 6.12.86-1
  • linux Debian 14 7.0.4-1

debian advisories DEBIAN-CVE-2026-43499

  • linux Ubuntu 22.04 LTS 5.15.0-187.197
  • linux Ubuntu 24.04 LTS 6.8.0-136.136
  • linux Ubuntu 26.04 LTS 7.0.0-27.27
  • linux-aws Ubuntu 22.04 LTS 5.15.0-1113.120
  • linux-aws Ubuntu 24.04 LTS 6.8.0-1061.64
  • linux-aws Ubuntu 26.04 LTS 7.0.0-1008.8
  • linux-gcp Ubuntu 22.04 LTS 5.15.0-1114.124
  • linux-gcp Ubuntu 24.04 LTS 6.8.0-1064.72

ubuntu advisories UBUNTU-CVE-2026-43499

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 enterprise linux nvidia 10 6.12.0-259.26.el10nv
  • rv enterprise linux nvidia 10 6.12.0-259.26.el10nv
  • perf enterprise linux nvidia 10 6.12.0-259.26.el10nv
  • rtla enterprise linux nvidia 10 6.12.0-259.26.el10nv
  • libperf enterprise linux nvidia 10 6.12.0-259.26.el10nv
  • kernel-64k enterprise linux nvidia 10 6.12.0-259.26.el10nv
  • kernel-core enterprise linux nvidia 10 6.12.0-259.26.el10nv
  • kernel-tools enterprise linux nvidia 10 6.12.0-259.26.el10nv

red hat advisories RHSA-2026:73187RHSA-2026:59148RHSA-2026:59149RHSA-2026:59147RHSA-2026:59145RHSA-2026:59146

  • kernel-rt Linux Micro 6.1, Linux Micro 6.0 6.4.0-48.1
  • kernel-source-rt Linux Micro 6.1, Linux Micro 6.0 6.4.0-48.1
  • kernel-rt Real Time Module 15 SP7 6.4.0-150700.7.59.2
  • kernel-syms-rt Real Time Module 15 SP7 6.4.0-150700.7.59.1
  • kernel-source-rt Real Time Module 15 SP7 6.4.0-150700.7.59.2
  • kernel-64kb SLE Module for Basesystem 15 SP7 6.4.0-150700.53.60.1
  • kernel-syms SLE Module for Development Tools 15 SP7 6.4.0-150700.53.60.1
  • kernel-azure SLE Module for Public Cloud 15 SP7 6.4.0-150700.53.60.1

suse advisories SUSE-SU-2026:22433-1SUSE-SU-2026:22458-1SUSE-SU-2026:2591-1SUSE-SU-2026:2482-1SUSE-SU-2026:2450-1SUSE-SU-2026:2421-1

  • kernel-source openSUSE Tumbleweed 7.0.10-1.1

opensuse advisories openSUSE-SU-2026:10859-1

  • kernel-rt AlmaLinux 8 4.18.0-553.143.1.rt7.484.el8_10
  • kernel-rt-core AlmaLinux 8 4.18.0-553.143.1.rt7.484.el8_10
  • kernel-rt-modules AlmaLinux 8 4.18.0-553.143.1.rt7.484.el8_10
  • kernel-rt-debug-core AlmaLinux 8 4.18.0-553.143.1.rt7.484.el8_10
  • kernel-rt-debug-modules AlmaLinux 8 4.18.0-553.143.1.rt7.484.el8_10
  • kernel-rt-modules-extra AlmaLinux 8 4.18.0-553.143.1.rt7.484.el8_10
  • kernel-rt-debug-modules-extra AlmaLinux 8 4.18.0-553.143.1.rt7.484.el8_10
  • kernel AlmaLinux 8 4.18.0-553.143.1.el8_10

almalinux advisories ALSA-2026:39082ALSA-2026:39083ALSA-2026:38491ALSA-2026:38492

  • kernel Rocky Linux 10 6.12.0-211.33.1.el10_2
  • kernel Rocky Linux 9 5.14.0-687.25.1.el9_8

rocky linux advisories RLSA-2026:38492RLSA-2026:38491

  • kernel Azure Linux 3.0 6.6.141.1-1

azure linux advisories AZL-87066

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

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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-2026-43499 updated cvss 7.8

kernel: rtmutex: Use waiter::task instead of current in remove_waiter()

  • 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 “See the security bulletin for a detailed mitigation procedure.”
  • Red Hat NVIDIA for RHEL 10 rv 6.12.0-231.16.el10nv, rv 6.12.0-259.26.el10nv, perf 6.12.0-231.16.el10nv, perf 6.12.0-259.26.el10nv, rtla 6.12.0-231.16.el10nv, rtla 6.12.0-259.26.el10nv, +59 more
    fixed: vendor fix “See the security bulletin for a detailed mitigation procedure.” RHSA-2026:37728
  • Red Hat CodeReady Linux Builder EUS (v.9.6) libperf 5.14.0-570.128.1.el9_6, kernel-debuginfo-common-s390x 5.14.0-570.128.1.el9_6, kernel-debuginfo-common-x86_64 5.14.0-570.128.1.el9_6, kernel-debuginfo-common-aarch64 5.14.0-570.128.1.el9_6, kernel-debuginfo-common-ppc64le 5.14.0-570.128.1.el9_6
    fixed: vendor fix “See the security bulletin for a detailed mitigation procedure.” RHSA-2026:40425
  • Red Hat Enterprise Linux AppStream (v. 9) rv 5.14.0-687.25.1.el9_8, perf 5.14.0-687.25.1.el9_8, rtla 5.14.0-687.25.1.el9_8, python3-perf 5.14.0-687.25.1.el9_8, kernel-devel-matched 5.14.0-687.25.1.el9_8, kernel-64k-devel-matched 5.14.0-687.25.1.el9_8, +7 more
    fixed: vendor fix “See the security bulletin for a detailed mitigation procedure.” RHSA-2026:38491
  • Red Hat Enterprise Linux AppStream (v. 10) rv 6.12.0-211.33.1.el10_2, perf 6.12.0-211.33.1.el10_2, rtla 6.12.0-211.33.1.el10_2, python3-perf 6.12.0-211.33.1.el10_2, kernel-devel-matched 6.12.0-211.33.1.el10_2, kernel-64k-devel-matched 6.12.0-211.33.1.el10_2, +7 more
    fixed: vendor fix “See the security bulletin for a detailed mitigation procedure.” RHSA-2026:38492
  • Red Hat Enterprise Linux AppStream E4S (v.9.2) perf 5.14.0-284.181.1.el9_2, rtla 5.14.0-284.181.1.el9_2, kernel-devel-matched 5.14.0-284.181.1.el9_2, kernel-64k-devel-matched 5.14.0-284.181.1.el9_2, kernel-debug-devel-matched 5.14.0-284.181.1.el9_2, kernel-debuginfo-common-s390x 5.14.0-284.181.1.el9_2, +5 more
    fixed: vendor fix “See the security bulletin for a detailed mitigation procedure.” RHSA-2026:40082
  • Red Hat Enterprise Linux AppStream E4S (v.9.4) rv 5.14.0-427.138.1.el9_4, perf 5.14.0-427.138.1.el9_4, rtla 5.14.0-427.138.1.el9_4, kernel-devel-matched 5.14.0-427.138.1.el9_4, kernel-64k-devel-matched 5.14.0-427.138.1.el9_4, kernel-debug-devel-matched 5.14.0-427.138.1.el9_4, +6 more
    fixed: vendor fix “See the security bulletin for a detailed mitigation procedure.” RHSA-2026:41063
  • Red Hat Enterprise Linux AppStream EUS (v. 10.0) rv 6.12.0-55.89.1.el10_0, perf 6.12.0-55.89.1.el10_0, rtla 6.12.0-55.89.1.el10_0, python3-perf 6.12.0-55.89.1.el10_0, kernel-devel-matched 6.12.0-55.89.1.el10_0, kernel-64k-devel-matched 6.12.0-55.89.1.el10_0, +7 more
    fixed: vendor fix “See the security bulletin for a detailed mitigation procedure.” RHSA-2026:41062
show 32 more
  • Red Hat Enterprise Linux AppStream EUS (v.9.6) rv 5.14.0-570.128.1.el9_6, perf 5.14.0-570.128.1.el9_6, rtla 5.14.0-570.128.1.el9_6, python3-perf 5.14.0-570.128.1.el9_6, kernel-devel-matched 5.14.0-570.128.1.el9_6, kernel-64k-devel-matched 5.14.0-570.128.1.el9_6, +7 more
    fixed: vendor fix “See the security bulletin for a detailed mitigation procedure.” RHSA-2026:40425
  • Red Hat Enterprise Linux BaseOS (v. 8) perf 4.18.0-553.143.1.el8_10, kernel 4.18.0-553.143.1.el8_10, bpftool 4.18.0-553.143.1.el8_10, kernel-core 4.18.0-553.143.1.el8_10, kernel-tools 4.18.0-553.143.1.el8_10, python3-perf 4.18.0-553.143.1.el8_10, +20 more
    fixed: vendor fix “See the security bulletin for a detailed mitigation procedure.” RHSA-2026:39083
  • Red Hat Enterprise Linux BaseOS (v. 9) kernel 5.14.0-687.25.1.el9_8, kernel-64k 5.14.0-687.25.1.el9_8, kernel-core 5.14.0-687.25.1.el9_8, kernel-tools 5.14.0-687.25.1.el9_8, kernel-modules 5.14.0-687.25.1.el9_8, kernel-64k-core 5.14.0-687.25.1.el9_8, +28 more
    fixed: vendor fix “See the security bulletin for a detailed mitigation procedure.” RHSA-2026:38491
  • Red Hat Enterprise Linux BaseOS (v. 10) kernel 6.12.0-211.33.1.el10_2, kernel-64k 6.12.0-211.33.1.el10_2, kernel-core 6.12.0-211.33.1.el10_2, kernel-tools 6.12.0-211.33.1.el10_2, kernel-modules 6.12.0-211.33.1.el10_2, kernel-64k-core 6.12.0-211.33.1.el10_2, +29 more
    fixed: vendor fix “See the security bulletin for a detailed mitigation procedure.” RHSA-2026:38492
  • Red Hat Enterprise Linux BaseOS AUS (v.8.4) perf 4.18.0-305.198.1.el8_4, kernel 4.18.0-305.198.1.el8_4, bpftool 4.18.0-305.198.1.el8_4, kernel-core 4.18.0-305.198.1.el8_4, kernel-tools 4.18.0-305.198.1.el8_4, python3-perf 4.18.0-305.198.1.el8_4, +8 more
    fixed: vendor fix “See the security bulletin for a detailed mitigation procedure.” RHSA-2026:39984
  • Red Hat Enterprise Linux BaseOS AUS (v.8.6) perf 4.18.0-372.201.1.el8_6, kernel 4.18.0-372.201.1.el8_6, bpftool 4.18.0-372.201.1.el8_6, kernel-core 4.18.0-372.201.1.el8_6, kernel-tools 4.18.0-372.201.1.el8_6, python3-perf 4.18.0-372.201.1.el8_6, +8 more
    fixed: vendor fix “See the security bulletin for a detailed mitigation procedure.” RHSA-2026:40068
  • Red Hat Enterprise Linux BaseOS E4S (v.8.8) perf 4.18.0-477.152.1.el8_8, kernel 4.18.0-477.152.1.el8_8, bpftool 4.18.0-477.152.1.el8_8, kernel-core 4.18.0-477.152.1.el8_8, kernel-tools 4.18.0-477.152.1.el8_8, python3-perf 4.18.0-477.152.1.el8_8, +14 more
    fixed: vendor fix “See the security bulletin for a detailed mitigation procedure.” RHSA-2026:40760
  • Red Hat Enterprise Linux BaseOS E4S (v.9.2) bpftool 7.0.0-284.181.1.el9_2, kernel 5.14.0-284.181.1.el9_2, kernel-64k 5.14.0-284.181.1.el9_2, kernel-core 5.14.0-284.181.1.el9_2, kernel-tools 5.14.0-284.181.1.el9_2, python3-perf 5.14.0-284.181.1.el9_2, +33 more
    fixed: vendor fix “See the security bulletin for a detailed mitigation procedure.” RHSA-2026:40082
  • Red Hat Enterprise Linux BaseOS E4S (v.9.4) bpftool 7.3.0-427.138.1.el9_4, kernel 5.14.0-427.138.1.el9_4, kernel-64k 5.14.0-427.138.1.el9_4, kernel-core 5.14.0-427.138.1.el9_4, kernel-tools 5.14.0-427.138.1.el9_4, python3-perf 5.14.0-427.138.1.el9_4, +33 more
    fixed: vendor fix “See the security bulletin for a detailed mitigation procedure.” RHSA-2026:41063
  • Red Hat Enterprise Linux BaseOS EUS (v. 10.0) kernel 6.12.0-55.89.1.el10_0, kernel-64k 6.12.0-55.89.1.el10_0, kernel-core 6.12.0-55.89.1.el10_0, kernel-tools 6.12.0-55.89.1.el10_0, kernel-modules 6.12.0-55.89.1.el10_0, kernel-64k-core 6.12.0-55.89.1.el10_0, +27 more
    fixed: vendor fix “See the security bulletin for a detailed mitigation procedure.” RHSA-2026:41062
  • Red Hat Enterprise Linux BaseOS EUS (v.9.6) kernel 5.14.0-570.128.1.el9_6, kernel-64k 5.14.0-570.128.1.el9_6, kernel-core 5.14.0-570.128.1.el9_6, kernel-tools 5.14.0-570.128.1.el9_6, kernel-modules 5.14.0-570.128.1.el9_6, kernel-64k-core 5.14.0-570.128.1.el9_6, +32 more
    fixed: vendor fix “See the security bulletin for a detailed mitigation procedure.” RHSA-2026:40425
  • Red Hat Enterprise Linux BaseOS EUS EXTENSION (v.8.4) perf 4.18.0-305.198.1.el8_4, kernel 4.18.0-305.198.1.el8_4, bpftool 4.18.0-305.198.1.el8_4, kernel-core 4.18.0-305.198.1.el8_4, kernel-tools 4.18.0-305.198.1.el8_4, python3-perf 4.18.0-305.198.1.el8_4, +8 more
    fixed: vendor fix “See the security bulletin for a detailed mitigation procedure.” RHSA-2026:39984
  • Red Hat Enterprise Linux BaseOS EUS EXTENSION (v.8.6) perf 4.18.0-372.201.1.el8_6, kernel 4.18.0-372.201.1.el8_6, bpftool 4.18.0-372.201.1.el8_6, kernel-core 4.18.0-372.201.1.el8_6, kernel-tools 4.18.0-372.201.1.el8_6, python3-perf 4.18.0-372.201.1.el8_6, +8 more
    fixed: vendor fix “See the security bulletin for a detailed mitigation procedure.” RHSA-2026:40068
  • Red Hat Enterprise Linux BaseOS TUS (v.8.8) perf 4.18.0-477.152.1.el8_8, kernel 4.18.0-477.152.1.el8_8, bpftool 4.18.0-477.152.1.el8_8, kernel-core 4.18.0-477.152.1.el8_8, kernel-tools 4.18.0-477.152.1.el8_8, python3-perf 4.18.0-477.152.1.el8_8, +8 more
    fixed: vendor fix “See the security bulletin for a detailed mitigation procedure.” RHSA-2026:40760
  • Red Hat Enterprise Linux CodeReady Linux Builder (v. 9) libperf 5.14.0-687.25.1.el9_8, kernel-debuginfo-common-s390x 5.14.0-687.25.1.el9_8, kernel-debuginfo-common-x86_64 5.14.0-687.25.1.el9_8, kernel-debuginfo-common-aarch64 5.14.0-687.25.1.el9_8, kernel-debuginfo-common-ppc64le 5.14.0-687.25.1.el9_8
    fixed: vendor fix “See the security bulletin for a detailed mitigation procedure.” RHSA-2026:38491
  • Red Hat Enterprise Linux CodeReady Linux Builder (v. 10) libperf 6.12.0-211.33.1.el10_2, kernel-debuginfo-common-s390x 6.12.0-211.33.1.el10_2, kernel-debuginfo-common-x86_64 6.12.0-211.33.1.el10_2, kernel-debuginfo-common-aarch64 6.12.0-211.33.1.el10_2, kernel-debuginfo-common-ppc64le 6.12.0-211.33.1.el10_2
    fixed: vendor fix “See the security bulletin for a detailed mitigation procedure.” RHSA-2026:38492
  • Red Hat Enterprise Linux CodeReady Linux Builder EUS (v. 10.0) libperf 6.12.0-55.89.1.el10_0, kernel-debuginfo-common-s390x 6.12.0-55.89.1.el10_0, kernel-debuginfo-common-x86_64 6.12.0-55.89.1.el10_0, kernel-debuginfo-common-aarch64 6.12.0-55.89.1.el10_0, kernel-debuginfo-common-ppc64le 6.12.0-55.89.1.el10_0
    fixed: vendor fix “See the security bulletin for a detailed mitigation procedure.” RHSA-2026:41062
  • Red Hat Enterprise Linux CRB (v. 8) kernel-debuginfo-common-x86_64 4.18.0-553.143.1.el8_10, kernel-debuginfo-common-aarch64 4.18.0-553.143.1.el8_10, kernel-debuginfo-common-ppc64le 4.18.0-553.143.1.el8_10
    fixed: vendor fix “See the security bulletin for a detailed mitigation procedure.” RHSA-2026:39083
  • Red Hat Enterprise Linux for Real Time (v. 7 ELS) kernel-rt 3.10.0-1160.156.1.rt56.1308.el7, kernel-rt-trace 3.10.0-1160.156.1.rt56.1308.el7, kernel-rt-debuginfo-common-x86_64 3.10.0-1160.156.1.rt56.1308.el7
    fixed: vendor fix “See the security bulletin for a detailed mitigation procedure.” RHSA-2026:41234
  • Red Hat Enterprise Linux NFV (v. 8) kernel-rt 4.18.0-553.143.1.rt7.484.el8_10, kernel-rt-kvm 4.18.0-553.143.1.rt7.484.el8_10, kernel-rt-core 4.18.0-553.143.1.rt7.484.el8_10, kernel-rt-modules 4.18.0-553.143.1.rt7.484.el8_10, kernel-rt-debug-kvm 4.18.0-553.143.1.rt7.484.el8_10, kernel-rt-debug-core 4.18.0-553.143.1.rt7.484.el8_10, +4 more
    fixed: vendor fix “See the security bulletin for a detailed mitigation procedure.” RHSA-2026:39082
  • Red Hat Enterprise Linux Real Time (v. 9) kernel-rt 5.14.0-687.25.1.el9_8, kernel-rt-64k 5.14.0-687.25.1.el9_8, kernel-rt-core 5.14.0-687.25.1.el9_8, kernel-rt-modules 5.14.0-687.25.1.el9_8, kernel-rt-64k-core 5.14.0-687.25.1.el9_8, kernel-rt-debug-core 5.14.0-687.25.1.el9_8, +14 more
    fixed: vendor fix “See the security bulletin for a detailed mitigation procedure.” RHSA-2026:38491
  • Red Hat Enterprise Linux Real Time (v. 10) kernel-rt 6.12.0-211.33.1.el10_2, kernel-rt-64k 6.12.0-211.33.1.el10_2, kernel-rt-core 6.12.0-211.33.1.el10_2, kernel-rt-modules 6.12.0-211.33.1.el10_2, kernel-rt-64k-core 6.12.0-211.33.1.el10_2, kernel-rt-debug-core 6.12.0-211.33.1.el10_2, +14 more
    fixed: vendor fix “See the security bulletin for a detailed mitigation procedure.” RHSA-2026:38492
  • Red Hat Enterprise Linux Real Time E4S (v.9.2) kernel-rt 5.14.0-284.181.1.rt14.466.el9_2, kernel-rt-core 5.14.0-284.181.1.rt14.466.el9_2, kernel-rt-modules 5.14.0-284.181.1.rt14.466.el9_2, kernel-rt-debug-core 5.14.0-284.181.1.rt14.466.el9_2, kernel-rt-modules-core 5.14.0-284.181.1.rt14.466.el9_2, kernel-rt-debug-modules 5.14.0-284.181.1.rt14.466.el9_2, +4 more
    fixed: vendor fix “See the security bulletin for a detailed mitigation procedure.” RHSA-2026:39983
  • Red Hat Enterprise Linux Real Time E4S (v.9.4) kernel-rt 5.14.0-427.138.1.el9_4, kernel-rt-core 5.14.0-427.138.1.el9_4, kernel-rt-modules 5.14.0-427.138.1.el9_4, kernel-rt-debug-core 5.14.0-427.138.1.el9_4, kernel-rt-modules-core 5.14.0-427.138.1.el9_4, kernel-rt-debug-modules 5.14.0-427.138.1.el9_4, +4 more
    fixed: vendor fix “See the security bulletin for a detailed mitigation procedure.” RHSA-2026:41063
  • Red Hat Enterprise Linux Real Time EUS (v. 10.0) kernel-rt 6.12.0-55.89.1.el10_0, kernel-rt-64k 6.12.0-55.89.1.el10_0, kernel-rt-core 6.12.0-55.89.1.el10_0, kernel-rt-modules 6.12.0-55.89.1.el10_0, kernel-rt-64k-core 6.12.0-55.89.1.el10_0, kernel-rt-debug-core 6.12.0-55.89.1.el10_0, +14 more
    fixed: vendor fix “See the security bulletin for a detailed mitigation procedure.” RHSA-2026:41062
  • Red Hat Enterprise Linux Real Time EUS (v.9.6) kernel-rt 5.14.0-570.128.1.el9_6, kernel-rt-64k 5.14.0-570.128.1.el9_6, kernel-rt-core 5.14.0-570.128.1.el9_6, kernel-rt-modules 5.14.0-570.128.1.el9_6, kernel-rt-64k-core 5.14.0-570.128.1.el9_6, kernel-rt-debug-core 5.14.0-570.128.1.el9_6, +14 more
    fixed: vendor fix “See the security bulletin for a detailed mitigation procedure.” RHSA-2026:40425
  • Red Hat Enterprise Linux Real Time for NFV (v. 9) kernel-rt 5.14.0-687.25.1.el9_8, kernel-rt-core 5.14.0-687.25.1.el9_8, kernel-rt-modules 5.14.0-687.25.1.el9_8, kernel-rt-debug-core 5.14.0-687.25.1.el9_8, kernel-rt-modules-core 5.14.0-687.25.1.el9_8, kernel-rt-debug-modules 5.14.0-687.25.1.el9_8, +4 more
    fixed: vendor fix “See the security bulletin for a detailed mitigation procedure.” RHSA-2026:38491
  • Red Hat Enterprise Linux Real Time for NFV (v. 10) kernel-rt 6.12.0-211.33.1.el10_2, kernel-rt-core 6.12.0-211.33.1.el10_2, kernel-rt-modules 6.12.0-211.33.1.el10_2, kernel-rt-debug-core 6.12.0-211.33.1.el10_2, kernel-rt-modules-core 6.12.0-211.33.1.el10_2, kernel-rt-debug-modules 6.12.0-211.33.1.el10_2, +4 more
    fixed: vendor fix “See the security bulletin for a detailed mitigation procedure.” RHSA-2026:38492
  • Red Hat Enterprise Linux Real Time for NFV E4S (v.9.2) kernel-rt 5.14.0-284.181.1.rt14.466.el9_2, kernel-rt-kvm 5.14.0-284.181.1.rt14.466.el9_2, kernel-rt-core 5.14.0-284.181.1.rt14.466.el9_2, kernel-rt-modules 5.14.0-284.181.1.rt14.466.el9_2, kernel-rt-debug-kvm 5.14.0-284.181.1.rt14.466.el9_2, kernel-rt-debug-core 5.14.0-284.181.1.rt14.466.el9_2, +6 more
    fixed: vendor fix “See the security bulletin for a detailed mitigation procedure.” RHSA-2026:39983
  • Red Hat Enterprise Linux Real Time for NFV E4S (v.9.4) kernel-rt 5.14.0-427.138.1.el9_4, kernel-rt-kvm 5.14.0-427.138.1.el9_4, kernel-rt-core 5.14.0-427.138.1.el9_4, kernel-rt-modules 5.14.0-427.138.1.el9_4, kernel-rt-debug-kvm 5.14.0-427.138.1.el9_4, kernel-rt-debug-core 5.14.0-427.138.1.el9_4, +6 more
    fixed: vendor fix “See the security bulletin for a detailed mitigation procedure.” RHSA-2026:41063
  • Red Hat Enterprise Linux Real Time for NFV EUS (v. 10.0) kernel-rt 6.12.0-55.89.1.el10_0, kernel-rt-kvm 6.12.0-55.89.1.el10_0, kernel-rt-core 6.12.0-55.89.1.el10_0, kernel-rt-modules 6.12.0-55.89.1.el10_0, kernel-rt-debug-kvm 6.12.0-55.89.1.el10_0, kernel-rt-debug-core 6.12.0-55.89.1.el10_0, +6 more
    fixed: vendor fix “See the security bulletin for a detailed mitigation procedure.” RHSA-2026:41062
  • Red Hat Enterprise Linux Real Time for NFV EUS (v.9.6) kernel-rt 5.14.0-570.128.1.el9_6, kernel-rt-kvm 5.14.0-570.128.1.el9_6, kernel-rt-core 5.14.0-570.128.1.el9_6, kernel-rt-modules 5.14.0-570.128.1.el9_6, kernel-rt-debug-kvm 5.14.0-570.128.1.el9_6, kernel-rt-debug-core 5.14.0-570.128.1.el9_6, +6 more
    fixed: vendor fix “See the security bulletin for a detailed mitigation procedure.” RHSA-2026:40425

5 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
Proof of concept is public
Automatable
no
Technical impact
total
Assessed
2mo ago

Exploit prediction

5.37% chance of exploitation in the next 30 days, higher than 92% of all scored CVEs (FIRST EPSS, 2026-11-09).

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
Technology feeds

References

Sources

Fencer Intel 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.