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Fencer Vulns
high 7.8

CVE-2026-23231 json

netfilter: nf_tables: fix use-after-free in nf_tables_addchain()

published 2026-03-04 8 mo ago modified 2026-10-19 20 d ago also EUVD-2026-9401

cvss
7.8
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
1.0%
EPSS 1.0% chance of exploitation in 30 days, percentile 64%
public exploits
1
Exploit-DB

Summary

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

netfilter: nf_tables: fix use-after-free in nf_tables_addchain()

nf_tables_addchain() publishes the chain to table->chains via list_add_tail_rcu() (in nft_chain_add()) before registering hooks. If nf_tables_register_hook() then fails, the error path calls nft_chain_del() (list_del_rcu()) followed by nf_tables_chain_destroy() with no RCU grace period in between.

This creates two use-after-free conditions:

1) Control-plane: nf_tables_dump_chains() traverses table->chains under rcu_read_lock(). A concurrent dump can still be walking the chain when the error path frees it.

2) Packet path: for NFPROTO_INET, nf_register_net_hook() briefly installs the IPv4 hook before IPv6 registration fails. Packets entering nft_do_chain() via the transient IPv4 hook can still be dereferencing chain->blob_gen_X when the error path frees the chain.

Add synchronize_rcu() between nft_chain_del() and the chain destroy so that all RCU readers -- both dump threads and in-flight packet evaluation -- have finished before the chain is freed.

Patch / fix

  • Linux Linux 6.1.165, 6.6.128, 6.12.75, 6.18.14, 6.19.4, 7.0
  • Siemens RUGGEDCOM RST2428P V4.0
  • linux Debian 12 6.1.170-1
  • linux Debian 13 6.12.85-1
  • linux Debian 14 6.18.14-1

debian advisories DEBIAN-CVE-2026-23231

  • linux Ubuntu 24.04 LTS 6.8.0-111.111
  • linux Ubuntu 25.10 6.17.0-23.23
  • linux-aws Ubuntu 24.04 LTS 6.8.0-1053.56
  • linux-aws Ubuntu 25.10 6.17.0-1013.13
  • linux-gcp Ubuntu 24.04 LTS 6.8.0-1055.58
  • linux-gcp Ubuntu 25.10 6.17.0-1013.13
  • linux-gke Ubuntu 24.04 LTS 6.8.0-1051.57
  • linux-ibm Ubuntu 24.04 LTS 6.8.0-1052.52

ubuntu advisories UBUNTU-CVE-2026-23231

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 4.18.0-553.117.1.el8_10
  • perf RHEL 8 4.18.0-553.117.1.el8_10
  • bpftool RHEL 8 4.18.0-553.117.1.el8_10
  • kernel-core RHEL 8 4.18.0-553.117.1.el8_10
  • kernel-tools RHEL 8 4.18.0-553.117.1.el8_10
  • python3-perf RHEL 8 4.18.0-553.117.1.el8_10
  • kernel-modules RHEL 8 4.18.0-553.117.1.el8_10
  • kernel-zfcpdump RHEL 8 4.18.0-553.117.1.el8_10

red hat advisories RHSA-2026:10756RHSA-2026:10108RHSA-2026:9836RHSA-2026:9870RHSA-2026:9835RHSA-2026:9644

  • kernel-rt Real Time Module 15 SP7 6.4.0-150700.7.37.2
  • kernel-syms-rt Real Time Module 15 SP7 6.4.0-150700.7.37.1
  • kernel-source-rt Real Time Module 15 SP7 6.4.0-150700.7.37.2
  • 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

suse advisories SUSE-SU-2026:1573-1SUSE-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-2026:20572-1openSUSE-SU-2026:10387-1

  • kernel AlmaLinux 9 5.14.0-611.47.1.el9_7
  • rv AlmaLinux 9 5.14.0-611.47.1.el9_7
  • perf AlmaLinux 9 5.14.0-611.47.1.el9_7
  • rtla AlmaLinux 9 5.14.0-611.47.1.el9_7
  • libperf AlmaLinux 9 5.14.0-611.47.1.el9_7
  • kernel-rt AlmaLinux 9 5.14.0-611.47.1.el9_7
  • kernel-64k AlmaLinux 9 5.14.0-611.47.1.el9_7
  • kernel-core AlmaLinux 9 5.14.0-611.47.1.el9_7

almalinux advisories ALSA-2026:6570ALSA-2026:6571ALSA-2026:6572ALSA-2026:6053

  • kernel Rocky Linux 9 5.14.0-611.47.1.el9_7
  • kernel-rt Rocky Linux 8 4.18.0-553.117.1.rt7.458.el8_10
  • kernel Rocky Linux 8 4.18.0-553.117.1.el8_10
  • kernel Rocky Linux 10 6.12.0-124.47.1.el10_1

rocky linux advisories RLSA-2026:6570RLSA-2026:6572RLSA-2026:6571RLSA-2026:6053

  • kernel Azure Linux 3.0 6.6.130.1-1

azure linux advisories AZL-78650

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-2026-23231 updated cvss 7.5

kernel: kernel: Privilege escalation or denial of service via use-after-free in nf_tables_addchain()

  • 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.9.4) 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 5.14.0-570.106.1.el9_6, kernel-debuginfo-common-s390x 5.14.0-570.106.1.el9_6, kernel-debuginfo-common-x86_64 5.14.0-570.106.1.el9_6, kernel-debuginfo-common-aarch64 5.14.0-570.106.1.el9_6, kernel-debuginfo-common-ppc64le 5.14.0-570.106.1.el9_6
    fixed: vendor fix RHSA-2026:6940
  • Red Hat Enterprise Linux AppStream (v. 9) rv 5.14.0-611.47.1.el9_7, perf 5.14.0-611.47.1.el9_7, rtla 5.14.0-611.47.1.el9_7, python3-perf 5.14.0-611.47.1.el9_7, kernel-devel-matched 5.14.0-611.47.1.el9_7, kernel-64k-devel-matched 5.14.0-611.47.1.el9_7, +7 more
    fixed: vendor fix RHSA-2026:6570
  • Red Hat Enterprise Linux AppStream (v. 10) rv 6.12.0-124.47.1.el10_1, perf 6.12.0-124.47.1.el10_1, rtla 6.12.0-124.47.1.el10_1, python3-perf 6.12.0-124.47.1.el10_1, kernel-devel-matched 6.12.0-124.47.1.el10_1, kernel-64k-devel-matched 6.12.0-124.47.1.el10_1, +7 more
    fixed: vendor fix RHSA-2026:6053
  • 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 6.12.0-55.69.1.el10_0, perf 6.12.0-55.69.1.el10_0, rtla 6.12.0-55.69.1.el10_0, python3-perf 6.12.0-55.69.1.el10_0, kernel-devel-matched 6.12.0-55.69.1.el10_0, kernel-64k-devel-matched 6.12.0-55.69.1.el10_0, +7 more
    fixed: vendor fix RHSA-2026:9095
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 5.14.0-570.106.1.el9_6, perf 5.14.0-570.106.1.el9_6, rtla 5.14.0-570.106.1.el9_6, python3-perf 5.14.0-570.106.1.el9_6, kernel-devel-matched 5.14.0-570.106.1.el9_6, kernel-64k-devel-matched 5.14.0-570.106.1.el9_6, +7 more
    fixed: vendor fix RHSA-2026:6940
  • Red Hat Enterprise Linux BaseOS (v. 8) perf 4.18.0-553.117.1.el8_10, kernel 4.18.0-553.117.1.el8_10, bpftool 4.18.0-553.117.1.el8_10, kernel-core 4.18.0-553.117.1.el8_10, kernel-tools 4.18.0-553.117.1.el8_10, python3-perf 4.18.0-553.117.1.el8_10, +15 more
    fixed: vendor fix RHSA-2026:6571
  • Red Hat Enterprise Linux BaseOS (v. 9) kernel 5.14.0-611.47.1.el9_7, kernel-64k 5.14.0-611.47.1.el9_7, kernel-core 5.14.0-611.47.1.el9_7, kernel-tools 5.14.0-611.47.1.el9_7, kernel-modules 5.14.0-611.47.1.el9_7, kernel-64k-core 5.14.0-611.47.1.el9_7, +27 more
    fixed: vendor fix RHSA-2026:6570
  • Red Hat Enterprise Linux BaseOS (v. 10) kernel 6.12.0-124.47.1.el10_1, kernel-64k 6.12.0-124.47.1.el10_1, kernel-core 6.12.0-124.47.1.el10_1, kernel-tools 6.12.0-124.47.1.el10_1, kernel-modules 6.12.0-124.47.1.el10_1, kernel-64k-core 6.12.0-124.47.1.el10_1, +28 more
    fixed: vendor fix RHSA-2026:6053
  • 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 6.12.0-55.69.1.el10_0, kernel-64k 6.12.0-55.69.1.el10_0, kernel-core 6.12.0-55.69.1.el10_0, kernel-tools 6.12.0-55.69.1.el10_0, kernel-modules 6.12.0-55.69.1.el10_0, kernel-64k-core 6.12.0-55.69.1.el10_0, +27 more
    fixed: vendor fix RHSA-2026:9095
  • 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 5.14.0-570.106.1.el9_6, kernel-64k 5.14.0-570.106.1.el9_6, kernel-core 5.14.0-570.106.1.el9_6, kernel-tools 5.14.0-570.106.1.el9_6, kernel-modules 5.14.0-570.106.1.el9_6, kernel-64k-core 5.14.0-570.106.1.el9_6, +27 more
    fixed: vendor fix RHSA-2026:6940
  • 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 5.14.0-611.47.1.el9_7, kernel-debuginfo-common-s390x 5.14.0-611.47.1.el9_7, kernel-debuginfo-common-x86_64 5.14.0-611.47.1.el9_7, kernel-debuginfo-common-aarch64 5.14.0-611.47.1.el9_7, kernel-debuginfo-common-ppc64le 5.14.0-611.47.1.el9_7
    fixed: vendor fix RHSA-2026:6570
  • Red Hat Enterprise Linux CodeReady Linux Builder (v. 10) libperf 6.12.0-124.47.1.el10_1, kernel-debuginfo-common-s390x 6.12.0-124.47.1.el10_1, kernel-debuginfo-common-x86_64 6.12.0-124.47.1.el10_1, kernel-debuginfo-common-aarch64 6.12.0-124.47.1.el10_1, kernel-debuginfo-common-ppc64le 6.12.0-124.47.1.el10_1
    fixed: vendor fix RHSA-2026:6053
  • Red Hat Enterprise Linux CodeReady Linux Builder EUS (v. 10.0) libperf 6.12.0-55.69.1.el10_0, kernel-debuginfo-common-s390x 6.12.0-55.69.1.el10_0, kernel-debuginfo-common-x86_64 6.12.0-55.69.1.el10_0, kernel-debuginfo-common-aarch64 6.12.0-55.69.1.el10_0, kernel-debuginfo-common-ppc64le 6.12.0-55.69.1.el10_0
    fixed: vendor fix RHSA-2026:9095
  • Red Hat Enterprise Linux CRB (v. 8) kernel-debuginfo-common-x86_64 4.18.0-553.117.1.el8_10, kernel-debuginfo-common-aarch64 4.18.0-553.117.1.el8_10, kernel-debuginfo-common-ppc64le 4.18.0-553.117.1.el8_10
    fixed: vendor fix RHSA-2026:6571
  • 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 4.18.0-553.117.1.rt7.458.el8_10, kernel-rt-kvm 4.18.0-553.117.1.rt7.458.el8_10, kernel-rt-core 4.18.0-553.117.1.rt7.458.el8_10, kernel-rt-modules 4.18.0-553.117.1.rt7.458.el8_10, kernel-rt-debug-kvm 4.18.0-553.117.1.rt7.458.el8_10, kernel-rt-debug-core 4.18.0-553.117.1.rt7.458.el8_10, +4 more
    fixed: vendor fix RHSA-2026:6572
  • 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 5.14.0-611.47.1.el9_7, kernel-rt-64k 5.14.0-611.47.1.el9_7, kernel-rt-core 5.14.0-611.47.1.el9_7, kernel-rt-modules 5.14.0-611.47.1.el9_7, kernel-rt-64k-core 5.14.0-611.47.1.el9_7, kernel-rt-debug-core 5.14.0-611.47.1.el9_7, +14 more
    fixed: vendor fix RHSA-2026:6570
  • Red Hat Enterprise Linux Real Time (v. 10) kernel-rt 6.12.0-124.47.1.el10_1, kernel-rt-64k 6.12.0-124.47.1.el10_1, kernel-rt-core 6.12.0-124.47.1.el10_1, kernel-rt-modules 6.12.0-124.47.1.el10_1, kernel-rt-64k-core 6.12.0-124.47.1.el10_1, kernel-rt-debug-core 6.12.0-124.47.1.el10_1, +14 more
    fixed: vendor fix RHSA-2026:6053
  • 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 6.12.0-55.69.1.el10_0, kernel-rt-64k 6.12.0-55.69.1.el10_0, kernel-rt-core 6.12.0-55.69.1.el10_0, kernel-rt-modules 6.12.0-55.69.1.el10_0, kernel-rt-64k-core 6.12.0-55.69.1.el10_0, kernel-rt-debug-core 6.12.0-55.69.1.el10_0, +14 more
    fixed: vendor fix RHSA-2026:9095
  • 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 5.14.0-570.106.1.el9_6, kernel-rt-64k 5.14.0-570.106.1.el9_6, kernel-rt-core 5.14.0-570.106.1.el9_6, kernel-rt-modules 5.14.0-570.106.1.el9_6, kernel-rt-64k-core 5.14.0-570.106.1.el9_6, kernel-rt-debug-core 5.14.0-570.106.1.el9_6, +14 more
    fixed: vendor fix RHSA-2026:6940

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 7.8

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 ICSA-26-209-04 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) >= 3.1.6 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

Timeline

  1. Published
  2. First public exploit (EDB-52549)

CISA SSVC

Exploitation
none
Automatable
no
Technical impact
total
Assessed
4 mo ago

Exploit prediction

1.04% chance of exploitation in the next 30 days, higher than 64% of all scored CVEs (FIRST EPSS, 2026-11-08).

Exploits and checks

  • EDB-52549 Linux nf_tables 6.19.3 - Local Privilege Escalation local, 2026-05-04

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
NVD 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 RUGGEDCOM RST2428P
  • 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.