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Fencer Vulns
high 7.1

CVE-2026-23204 json

net/sched: cls_u32: use skb_header_pointer_careful()

published 2026-02-14 8 mo ago modified 2026-10-19 20 d ago also EUVD-2026-5841

cvss
7.1
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
0.2%
EPSS 0.2% chance of exploitation in 30 days, percentile 4%
public exploits
0
none known

Summary

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

net/sched: cls_u32: use skb_header_pointer_careful()

skb_header_pointer() does not fully validate negative @offset values.

Use skb_header_pointer_careful() instead.

GangMin Kim provided a report and a repro fooling u32_classify():

BUG: KASAN: slab-out-of-bounds in u32_classify+0x1180/0x11b0 net/sched/cls_u32.c:221

Patch / fix

  • Linux Linux 5.10.260, 5.15.209, 6.1.167, 6.6.124, 6.12.70, 6.18.10, 6.19
  • linux Debian 12 6.1.170-1
  • linux Debian 13 6.12.73-1
  • linux Debian 14 6.18.10-1

debian advisories DEBIAN-CVE-2026-23204

  • linux Ubuntu 22.04 LTS 5.15.0-186.196
  • linux Ubuntu 24.04 LTS 6.8.0-117.117
  • linux-aws Ubuntu 22.04 LTS 5.15.0-1112.119
  • linux-aws Ubuntu 24.04 LTS 6.8.0-1055.58
  • linux-gcp Ubuntu 22.04 LTS 5.15.0-1112.122
  • linux-gcp Ubuntu 24.04 LTS 6.8.0-1058.61
  • linux-gke Ubuntu 22.04 LTS 5.15.0-1108.114
  • linux-gke Ubuntu 24.04 LTS 6.8.0-1054.60

ubuntu advisories UBUNTU-CVE-2026-23204

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 9 5.14.0-687.10.1.el9_8
  • rv RHEL 9 5.14.0-687.10.1.el9_8
  • perf RHEL 9 5.14.0-687.10.1.el9_8
  • rtla RHEL 9 5.14.0-687.10.1.el9_8
  • libperf RHEL 9 5.14.0-687.10.1.el9_8
  • kernel-rt RHEL 9 5.14.0-687.10.1.el9_8
  • kernel-64k RHEL 9 5.14.0-687.10.1.el9_8
  • kernel-core RHEL 9 5.14.0-687.10.1.el9_8

red hat advisories RHSA-2026:19568RHSA-2026:10756RHSA-2026:10108RHSA-2026:9836RHSA-2026:9870RHSA-2026:9835

  • kernel-rt Linux Micro 6.2 6.12.0-160000.28.1
  • kernel-64kb Linux Micro 6.2 6.12.0-160000.28.1
  • kernel-source Linux Micro 6.2 6.12.0-160000.28.1
  • kernel-default Linux Micro 6.2 6.12.0-160000.28.1
  • kernel-default-base Linux Micro 6.2 6.12.0-160000.27.1.160000.2.8
  • gdk-pixbuf Linux Micro 6.2 2.42.12-160000.4.1
  • kernel-syms Linux Micro Extras 6.2 6.12.0-160000.28.1
  • kernel-obs-build Linux Micro Extras 6.2 6.12.0-160000.28.1

suse advisories SUSE-SU-2026:3809-1SUSE-SU-2026:21237-1SUSE-SU-2026:21230-1SUSE-SU-2026:21255-1SUSE-SU-2026:21123-1SUSE-SU-2026:21114-1

  • kernel-rt openSUSE Leap 16.0 6.12.0-160000.28.1
  • dtb-aarch64 openSUSE Leap 16.0 6.12.0-160000.28.1
  • kernel-64kb openSUSE Leap 16.0 6.12.0-160000.28.1
  • kernel-syms openSUSE Leap 16.0 6.12.0-160000.28.1
  • kernel-azure openSUSE Leap 16.0 6.12.0-160000.28.1
  • kernel-obs-qa openSUSE Leap 16.0 6.12.0-160000.28.1
  • kernel-source openSUSE Leap 16.0 6.12.0-160000.28.1
  • kernel-default openSUSE Leap 16.0 6.12.0-160000.28.1

opensuse advisories openSUSE-SU-2026:20572-1

  • kernel AlmaLinux 9 5.14.0-687.10.1.el9_8
  • rv AlmaLinux 9 5.14.0-687.10.1.el9_8
  • perf AlmaLinux 9 5.14.0-687.10.1.el9_8
  • rtla AlmaLinux 9 5.14.0-687.10.1.el9_8
  • libperf AlmaLinux 9 5.14.0-687.10.1.el9_8
  • kernel-rt AlmaLinux 9 5.14.0-687.10.1.el9_8
  • kernel-64k AlmaLinux 9 5.14.0-687.10.1.el9_8
  • kernel-core AlmaLinux 9 5.14.0-687.10.1.el9_8

almalinux advisories ALSA-2026:19568ALSA-2026:6632ALSA-2026:6036ALSA-2026:6037ALSA-2026:6153

  • kernel Rocky Linux 9 5.14.0-687.10.1.el9_8.0.1
  • kernel Rocky Linux 10 6.12.0-124.49.1.el10_1
  • kernel Rocky Linux 9 5.14.0-611.45.1.el9_7
  • kernel-rt Rocky Linux 8 4.18.0-553.115.1.rt7.456.el8_10
  • kernel Rocky Linux 8 4.18.0-553.115.1.el8_10

rocky linux advisories RLSA-2026:19568RLSA-2026:6632RLSA-2026:6153RLSA-2026:6036RLSA-2026:6037

  • kernel Azure Linux 3.0 6.6.126.1-1

azure linux advisories AZL-77658

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-2026-23204 updated cvss 7.3

kernel: net/sched: cls_u32: use skb_header_pointer_careful()

  • 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: no fix available
  • Red Hat CodeReady Linux Builder EUS (v.9.4) libperf 5.14.0-427.121.1.el9_4, kernel-debuginfo-common-s390x 5.14.0-427.121.1.el9_4, kernel-debuginfo-common-x86_64 5.14.0-427.121.1.el9_4, kernel-debuginfo-common-aarch64 5.14.0-427.121.1.el9_4, kernel-debuginfo-common-ppc64le 5.14.0-427.121.1.el9_4
    fixed: vendor fix RHSA-2026:10108
  • Red Hat CodeReady Linux Builder EUS (v.9.6) libperf 5.14.0-570.108.1.el9_6, kernel-debuginfo-common-s390x 5.14.0-570.108.1.el9_6, kernel-debuginfo-common-x86_64 5.14.0-570.108.1.el9_6, kernel-debuginfo-common-aarch64 5.14.0-570.108.1.el9_6, kernel-debuginfo-common-ppc64le 5.14.0-570.108.1.el9_6
    fixed: vendor fix RHSA-2026:9112
  • Red Hat Enterprise Linux AppStream (v. 9) rv 5.14.0-611.45.1.el9_7, rv 5.14.0-687.10.1.el9_8, perf 5.14.0-611.45.1.el9_7, perf 5.14.0-687.10.1.el9_8, rtla 5.14.0-611.45.1.el9_7, rtla 5.14.0-687.10.1.el9_8, +20 more
    fixed: vendor fix RHSA-2026:6153
  • Red Hat Enterprise Linux AppStream (v. 10) rv 6.12.0-124.49.1.el10_1, perf 6.12.0-124.49.1.el10_1, rtla 6.12.0-124.49.1.el10_1, python3-perf 6.12.0-124.49.1.el10_1, kernel-devel-matched 6.12.0-124.49.1.el10_1, kernel-64k-devel-matched 6.12.0-124.49.1.el10_1, +7 more
    fixed: vendor fix RHSA-2026:6632
  • Red Hat Enterprise Linux AppStream E4S (v.9.0) perf 5.14.0-70.175.1.el9_0, kernel-devel-matched 5.14.0-70.175.1.el9_0, kernel-debug-devel-matched 5.14.0-70.175.1.el9_0, kernel-debuginfo-common-s390x 5.14.0-70.175.1.el9_0, kernel-zfcpdump-devel-matched 5.14.0-70.175.1.el9_0, kernel-debuginfo-common-x86_64 5.14.0-70.175.1.el9_0, +2 more
    fixed: vendor fix RHSA-2026:9836
  • Red Hat Enterprise Linux AppStream E4S (v.9.2) perf 5.14.0-284.166.1.el9_2, rtla 5.14.0-284.166.1.el9_2, kernel-devel-matched 5.14.0-284.166.1.el9_2, kernel-64k-devel-matched 5.14.0-284.166.1.el9_2, kernel-debug-devel-matched 5.14.0-284.166.1.el9_2, kernel-debuginfo-common-s390x 5.14.0-284.166.1.el9_2, +5 more
    fixed: vendor fix RHSA-2026:9644
  • Red Hat Enterprise Linux AppStream EUS (v. 10.0) rv 6.12.0-55.68.1.el10_0, perf 6.12.0-55.68.1.el10_0, rtla 6.12.0-55.68.1.el10_0, python3-perf 6.12.0-55.68.1.el10_0, kernel-devel-matched 6.12.0-55.68.1.el10_0, kernel-64k-devel-matched 6.12.0-55.68.1.el10_0, +7 more
    fixed: vendor fix RHSA-2026:8342
show 31 more
  • Red Hat Enterprise Linux AppStream EUS (v.9.4) rv 5.14.0-427.121.1.el9_4, perf 5.14.0-427.121.1.el9_4, rtla 5.14.0-427.121.1.el9_4, kernel-devel-matched 5.14.0-427.121.1.el9_4, kernel-64k-devel-matched 5.14.0-427.121.1.el9_4, kernel-debug-devel-matched 5.14.0-427.121.1.el9_4, +6 more
    fixed: vendor fix RHSA-2026:10108
  • Red Hat Enterprise Linux AppStream EUS (v.9.6) rv 5.14.0-570.108.1.el9_6, perf 5.14.0-570.108.1.el9_6, rtla 5.14.0-570.108.1.el9_6, python3-perf 5.14.0-570.108.1.el9_6, kernel-devel-matched 5.14.0-570.108.1.el9_6, kernel-64k-devel-matched 5.14.0-570.108.1.el9_6, +7 more
    fixed: vendor fix RHSA-2026:9112
  • Red Hat Enterprise Linux BaseOS (v. 8) perf 4.18.0-553.115.1.el8_10, kernel 4.18.0-553.115.1.el8_10, bpftool 4.18.0-553.115.1.el8_10, kernel-core 4.18.0-553.115.1.el8_10, kernel-tools 4.18.0-553.115.1.el8_10, python3-perf 4.18.0-553.115.1.el8_10, +15 more
    fixed: vendor fix RHSA-2026:6037
  • Red Hat Enterprise Linux BaseOS (v. 9) kernel 5.14.0-611.45.1.el9_7, kernel 5.14.0-687.10.1.el9_8, kernel-64k 5.14.0-611.45.1.el9_7, kernel-64k 5.14.0-687.10.1.el9_8, kernel-core 5.14.0-611.45.1.el9_7, kernel-core 5.14.0-687.10.1.el9_8, +60 more
    fixed: vendor fix RHSA-2026:6153
  • Red Hat Enterprise Linux BaseOS (v. 10) kernel 6.12.0-124.49.1.el10_1, kernel-64k 6.12.0-124.49.1.el10_1, kernel-core 6.12.0-124.49.1.el10_1, kernel-tools 6.12.0-124.49.1.el10_1, kernel-modules 6.12.0-124.49.1.el10_1, kernel-64k-core 6.12.0-124.49.1.el10_1, +28 more
    fixed: vendor fix RHSA-2026:6632
  • Red Hat Enterprise Linux BaseOS AUS (v. 8.2) perf 4.18.0-193.195.1.el8_2, kernel 4.18.0-193.195.1.el8_2, bpftool 4.18.0-193.195.1.el8_2, kernel-core 4.18.0-193.195.1.el8_2, kernel-tools 4.18.0-193.195.1.el8_2, python3-perf 4.18.0-193.195.1.el8_2, +8 more
    fixed: vendor fix RHSA-2026:9513
  • Red Hat Enterprise Linux BaseOS AUS (v.8.4) perf 4.18.0-305.189.1.el8_4, kernel 4.18.0-305.189.1.el8_4, bpftool 4.18.0-305.189.1.el8_4, kernel-core 4.18.0-305.189.1.el8_4, kernel-tools 4.18.0-305.189.1.el8_4, python3-perf 4.18.0-305.189.1.el8_4, +8 more
    fixed: vendor fix RHSA-2026:9643
  • Red Hat Enterprise Linux BaseOS AUS (v.8.6) perf 4.18.0-372.188.1.el8_6, kernel 4.18.0-372.188.1.el8_6, bpftool 4.18.0-372.188.1.el8_6, kernel-core 4.18.0-372.188.1.el8_6, kernel-tools 4.18.0-372.188.1.el8_6, python3-perf 4.18.0-372.188.1.el8_6, +8 more Red Hat Enterprise Linux BaseOS E4S (v.8.6) perf 4.18.0-372.188.1.el8_6, kernel 4.18.0-372.188.1.el8_6, bpftool 4.18.0-372.188.1.el8_6, kernel-core 4.18.0-372.188.1.el8_6, kernel-tools 4.18.0-372.188.1.el8_6, python3-perf 4.18.0-372.188.1.el8_6, +15 more
    fixed: vendor fix RHSA-2026:9514
  • Red Hat Enterprise Linux BaseOS E4S (v.8.8) perf 4.18.0-477.136.1.el8_8, kernel 4.18.0-477.136.1.el8_8, bpftool 4.18.0-477.136.1.el8_8, kernel-core 4.18.0-477.136.1.el8_8, kernel-tools 4.18.0-477.136.1.el8_8, python3-perf 4.18.0-477.136.1.el8_8, +9 more
    fixed: vendor fix RHSA-2026:9515
  • Red Hat Enterprise Linux BaseOS E4S (v.9.0) kernel 5.14.0-70.175.1.el9_0, bpftool 5.14.0-70.175.1.el9_0, kernel-core 5.14.0-70.175.1.el9_0, kernel-tools 5.14.0-70.175.1.el9_0, python3-perf 5.14.0-70.175.1.el9_0, kernel-modules 5.14.0-70.175.1.el9_0, +14 more
    fixed: vendor fix RHSA-2026:9836
  • Red Hat Enterprise Linux BaseOS E4S (v.9.2) bpftool 7.0.0-284.166.1.el9_2, kernel 5.14.0-284.166.1.el9_2, kernel-64k 5.14.0-284.166.1.el9_2, kernel-core 5.14.0-284.166.1.el9_2, kernel-tools 5.14.0-284.166.1.el9_2, python3-perf 5.14.0-284.166.1.el9_2, +28 more
    fixed: vendor fix RHSA-2026:9644
  • Red Hat Enterprise Linux BaseOS EUS (v. 10.0) kernel 6.12.0-55.68.1.el10_0, kernel-64k 6.12.0-55.68.1.el10_0, kernel-core 6.12.0-55.68.1.el10_0, kernel-tools 6.12.0-55.68.1.el10_0, kernel-modules 6.12.0-55.68.1.el10_0, kernel-64k-core 6.12.0-55.68.1.el10_0, +27 more
    fixed: vendor fix RHSA-2026:8342
  • Red Hat Enterprise Linux BaseOS EUS (v.9.4) bpftool 7.3.0-427.121.1.el9_4, kernel 5.14.0-427.121.1.el9_4, kernel-64k 5.14.0-427.121.1.el9_4, kernel-core 5.14.0-427.121.1.el9_4, kernel-tools 5.14.0-427.121.1.el9_4, python3-perf 5.14.0-427.121.1.el9_4, +28 more
    fixed: vendor fix RHSA-2026:10108
  • Red Hat Enterprise Linux BaseOS EUS (v.9.6) kernel 5.14.0-570.108.1.el9_6, kernel-64k 5.14.0-570.108.1.el9_6, kernel-core 5.14.0-570.108.1.el9_6, kernel-tools 5.14.0-570.108.1.el9_6, kernel-modules 5.14.0-570.108.1.el9_6, kernel-64k-core 5.14.0-570.108.1.el9_6, +27 more
    fixed: vendor fix RHSA-2026:9112
  • Red Hat Enterprise Linux BaseOS EUS EXTENSION (v.8.4) perf 4.18.0-305.189.1.el8_4, kernel 4.18.0-305.189.1.el8_4, bpftool 4.18.0-305.189.1.el8_4, kernel-core 4.18.0-305.189.1.el8_4, kernel-tools 4.18.0-305.189.1.el8_4, python3-perf 4.18.0-305.189.1.el8_4, +8 more
    fixed: vendor fix RHSA-2026:9643
  • Red Hat Enterprise Linux BaseOS TUS (v.8.6) perf 4.18.0-372.188.1.el8_6, kernel 4.18.0-372.188.1.el8_6, bpftool 4.18.0-372.188.1.el8_6, kernel-core 4.18.0-372.188.1.el8_6, kernel-tools 4.18.0-372.188.1.el8_6, python3-perf 4.18.0-372.188.1.el8_6, +8 more
    fixed: vendor fix RHSA-2026:9514
  • Red Hat Enterprise Linux BaseOS TUS (v.8.8) perf 4.18.0-477.136.1.el8_8, kernel 4.18.0-477.136.1.el8_8, bpftool 4.18.0-477.136.1.el8_8, kernel-core 4.18.0-477.136.1.el8_8, kernel-tools 4.18.0-477.136.1.el8_8, python3-perf 4.18.0-477.136.1.el8_8, +8 more
    fixed: vendor fix RHSA-2026:9515
  • Red Hat Enterprise Linux CodeReady Linux Builder (v. 9) libperf 5.14.0-611.45.1.el9_7, libperf 5.14.0-687.10.1.el9_8, kernel-debuginfo-common-s390x 5.14.0-611.45.1.el9_7, kernel-debuginfo-common-s390x 5.14.0-687.10.1.el9_8, kernel-debuginfo-common-x86_64 5.14.0-611.45.1.el9_7, kernel-debuginfo-common-x86_64 5.14.0-687.10.1.el9_8, +4 more
    fixed: vendor fix RHSA-2026:6153
  • Red Hat Enterprise Linux CodeReady Linux Builder (v. 10) libperf 6.12.0-124.49.1.el10_1, kernel-debuginfo-common-s390x 6.12.0-124.49.1.el10_1, kernel-debuginfo-common-x86_64 6.12.0-124.49.1.el10_1, kernel-debuginfo-common-aarch64 6.12.0-124.49.1.el10_1, kernel-debuginfo-common-ppc64le 6.12.0-124.49.1.el10_1
    fixed: vendor fix RHSA-2026:6632
  • Red Hat Enterprise Linux CodeReady Linux Builder EUS (v. 10.0) libperf 6.12.0-55.68.1.el10_0, kernel-debuginfo-common-s390x 6.12.0-55.68.1.el10_0, kernel-debuginfo-common-x86_64 6.12.0-55.68.1.el10_0, kernel-debuginfo-common-aarch64 6.12.0-55.68.1.el10_0, kernel-debuginfo-common-ppc64le 6.12.0-55.68.1.el10_0
    fixed: vendor fix RHSA-2026:8342
  • Red Hat Enterprise Linux CRB (v. 8) kernel-debuginfo-common-x86_64 4.18.0-553.115.1.el8_10, kernel-debuginfo-common-aarch64 4.18.0-553.115.1.el8_10, kernel-debuginfo-common-ppc64le 4.18.0-553.115.1.el8_10
    fixed: vendor fix RHSA-2026:6037
  • Red Hat Enterprise Linux for Real Time (v. 7 ELS) kernel-rt 3.10.0-1160.148.1.rt56.1300.el7, kernel-rt-trace 3.10.0-1160.148.1.rt56.1300.el7, kernel-rt-debuginfo-common-x86_64 3.10.0-1160.148.1.rt56.1300.el7
    fixed: vendor fix RHSA-2026:10756
  • Red Hat Enterprise Linux NFV (v. 8) kernel-rt 4.18.0-553.115.1.rt7.456.el8_10, kernel-rt-kvm 4.18.0-553.115.1.rt7.456.el8_10, kernel-rt-core 4.18.0-553.115.1.rt7.456.el8_10, kernel-rt-modules 4.18.0-553.115.1.rt7.456.el8_10, kernel-rt-debug-kvm 4.18.0-553.115.1.rt7.456.el8_10, kernel-rt-debug-core 4.18.0-553.115.1.rt7.456.el8_10, +4 more
    fixed: vendor fix RHSA-2026:6036
  • Red Hat Enterprise Linux NFV E4S (v.9.0) kernel-rt 5.14.0-70.175.1.rt21.247.el9_0, kernel-rt-kvm 5.14.0-70.175.1.rt21.247.el9_0, kernel-rt-core 5.14.0-70.175.1.rt21.247.el9_0, kernel-rt-modules 5.14.0-70.175.1.rt21.247.el9_0, kernel-rt-debug-kvm 5.14.0-70.175.1.rt21.247.el9_0, kernel-rt-debug-core 5.14.0-70.175.1.rt21.247.el9_0, +4 more
    fixed: vendor fix RHSA-2026:9835
  • Red Hat Enterprise Linux Real Time (v. 9) kernel-rt 5.14.0-611.45.1.el9_7, kernel-rt 5.14.0-687.10.1.el9_8, kernel-rt-64k 5.14.0-611.45.1.el9_7, kernel-rt-64k 5.14.0-687.10.1.el9_8, kernel-rt-core 5.14.0-611.45.1.el9_7, kernel-rt-core 5.14.0-687.10.1.el9_8, +34 more
    fixed: vendor fix RHSA-2026:6153
  • Red Hat Enterprise Linux Real Time (v. 10) kernel-rt 6.12.0-124.49.1.el10_1, kernel-rt-64k 6.12.0-124.49.1.el10_1, kernel-rt-core 6.12.0-124.49.1.el10_1, kernel-rt-modules 6.12.0-124.49.1.el10_1, kernel-rt-64k-core 6.12.0-124.49.1.el10_1, kernel-rt-debug-core 6.12.0-124.49.1.el10_1, +14 more
    fixed: vendor fix RHSA-2026:6632
  • Red Hat Enterprise Linux Real Time E4S (v.9.0) kernel-rt 5.14.0-70.175.1.rt21.247.el9_0, kernel-rt-core 5.14.0-70.175.1.rt21.247.el9_0, kernel-rt-modules 5.14.0-70.175.1.rt21.247.el9_0, kernel-rt-debug-core 5.14.0-70.175.1.rt21.247.el9_0, kernel-rt-debug-modules 5.14.0-70.175.1.rt21.247.el9_0, kernel-rt-modules-extra 5.14.0-70.175.1.rt21.247.el9_0, +2 more
    fixed: vendor fix RHSA-2026:9835
  • Red Hat Enterprise Linux Real Time E4S (v.9.2) kernel-rt 5.14.0-284.166.1.rt14.451.el9_2, kernel-rt-core 5.14.0-284.166.1.rt14.451.el9_2, kernel-rt-modules 5.14.0-284.166.1.rt14.451.el9_2, kernel-rt-debug-core 5.14.0-284.166.1.rt14.451.el9_2, kernel-rt-modules-core 5.14.0-284.166.1.rt14.451.el9_2, kernel-rt-debug-modules 5.14.0-284.166.1.rt14.451.el9_2, +4 more
    fixed: vendor fix RHSA-2026:9512
  • Red Hat Enterprise Linux Real Time EUS (v. 10.0) kernel-rt 6.12.0-55.68.1.el10_0, kernel-rt-64k 6.12.0-55.68.1.el10_0, kernel-rt-core 6.12.0-55.68.1.el10_0, kernel-rt-modules 6.12.0-55.68.1.el10_0, kernel-rt-64k-core 6.12.0-55.68.1.el10_0, kernel-rt-debug-core 6.12.0-55.68.1.el10_0, +14 more
    fixed: vendor fix RHSA-2026:8342
  • Red Hat Enterprise Linux Real Time EUS (v.9.4) kernel-rt 5.14.0-427.121.1.el9_4, kernel-rt-core 5.14.0-427.121.1.el9_4, kernel-rt-modules 5.14.0-427.121.1.el9_4, kernel-rt-debug-core 5.14.0-427.121.1.el9_4, kernel-rt-modules-core 5.14.0-427.121.1.el9_4, kernel-rt-debug-modules 5.14.0-427.121.1.el9_4, +4 more
    fixed: vendor fix RHSA-2026:10108
  • Red Hat Enterprise Linux Real Time EUS (v.9.6) kernel-rt 5.14.0-570.108.1.el9_6, kernel-rt-64k 5.14.0-570.108.1.el9_6, kernel-rt-core 5.14.0-570.108.1.el9_6, kernel-rt-modules 5.14.0-570.108.1.el9_6, kernel-rt-64k-core 5.14.0-570.108.1.el9_6, kernel-rt-debug-core 5.14.0-570.108.1.el9_6, +14 more
    fixed: vendor fix RHSA-2026:9112

9 more fixed, 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 ICSA-26-295-11 updated cvss 7.1

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 7.1

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 ICSA-26-209-04 updated cvss 7.1

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

  • Siemens SIMATIC S7-1500 CPU 1518-4 PN/DP MFP (6ES7518-4AX00-1AB0) >= 3.1.6 Siemens SIMATIC S7-1500 CPU 1518-4 PN/DP MFP (6ES7518-4AX00-1AC0) >= 3.1.6 Siemens SIMATIC S7-1500 CPU 1518F-4 PN/DP MFP (6ES7518-4FX00-1AB0) >= 3.1.6 Siemens SIMATIC S7-1500 CPU 1518F-4 PN/DP MFP (6ES7518-4FX00-1AC0) >= 3.1.6 Siemens SIPLUS S7-1500 CPU 1518-4 PN/DP MFP (6AG1518-4AX00-4AC0) >= 3.1.6
    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
partial
Assessed
4 mo ago

Exploit prediction

0.15% chance of exploitation in the next 30 days, higher than 4% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by version score vector
CNA 3.1 7.1 CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H
NVD 3.1 7.1 CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/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 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.