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Fencer Vulns
high 7.8

CVE-2026-43329 json

netfilter: flowtable: strictly check for maximum number of actions

published 2026-05-08 6 mo ago modified 2026-10-19 20 d ago also EUVD-2026-28613

cvss
7.8
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 7%
public exploits
0
none known

Summary

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

netfilter: flowtable: strictly check for maximum number of actions

The maximum number of flowtable hardware offload actions in IPv6 is:

* ethernet mangling (4 payload actions, 2 for each ethernet address) * SNAT (4 payload actions) * DNAT (4 payload actions) * Double VLAN (4 vlan actions, 2 for popping vlan, and 2 for pushing) for QinQ. * Redirect (1 action)

Which makes 17, while the maximum is 16. But act_ct supports for tunnels actions too. Note that payload action operates at 32-bit word level, so mangling an IPv6 address takes 4 payload actions.

Update flow_action_entry_next() calls to check for the maximum number of supported actions.

While at it, rise the maximum number of actions per flow from 16 to 24 so this works fine with IPv6 setups.

Patch / fix

  • Linux Linux 5.15.203, 6.1.168, 6.6.134, 6.12.81, 6.18.22, 6.19.12, 7.0
  • Red Hat Red Hat Enterprise Linux 10 0:6.12.0-211.20.1.el10_2
  • Red Hat Red Hat Enterprise Linux 10.0 Extended Update Support 0:6.12.0-55.84.1.el10_0
  • Red Hat Red Hat Enterprise Linux 8 0:4.18.0-553.134.1.el8_10, 0:4.18.0-553.134.1.rt7.475.el8_10
  • Red Hat Red Hat Enterprise Linux 8.4 Advanced Mission Critical Update Support 0:4.18.0-305.197.1.el8_4
  • Red Hat Red Hat Enterprise Linux 8.4 Extended Update Support Long-Life Add-On 0:4.18.0-305.197.1.el8_4
  • Red Hat Red Hat Enterprise Linux 8.6 Advanced Mission Critical Update Support 0:4.18.0-372.198.1.el8_6
  • Red Hat Red Hat Enterprise Linux 8.6 Extended Update Support Long-Life Add-On 0:4.18.0-372.198.1.el8_6
  • Red Hat Red Hat Enterprise Linux 8.8 Telecommunications Update Service 0:4.18.0-477.150.1.el8_8
  • Red Hat Red Hat Enterprise Linux 8.8 Update Services for SAP Solutions 0:4.18.0-477.150.1.el8_8
  • Red Hat Red Hat Enterprise Linux 9 0:5.14.0-687.19.1.el9_8
  • Red Hat Red Hat Enterprise Linux 9.2 Update Services for SAP Solutions 0:5.14.0-284.178.1.el9_2, 0:5.14.0-284.178.1.rt14.463.el9_2
  • Red Hat Red Hat Enterprise Linux 9.4 Update Services for SAP Solutions 0:5.14.0-427.134.1.el9_4
  • Red Hat Red Hat Enterprise Linux 9.6 Extended Update Support 0:5.14.0-570.125.1.el9_6
  • Red Hat Red Hat OpenShift Container Platform 4.12 412.86.202607211933-0
  • Red Hat Red Hat OpenShift Container Platform 4.13 413.92.202608111330-0
  • Red Hat Red Hat OpenShift Container Platform 4.14 414.92.202607210313-0
  • Red Hat Red Hat OpenShift Container Platform 4.15 415.92.202608180329-0
  • Red Hat Red Hat OpenShift Container Platform 4.16 416.94.202608150307-0
  • Red Hat Red Hat OpenShift Container Platform 4.17 417.94.202607240132-0
  • Red Hat Red Hat OpenShift Container Platform 4.18 418.94.202607211754-0
  • Red Hat Red Hat OpenShift Container Platform 4.19 4.19.9.6.202607220857-0
  • Red Hat Red Hat OpenShift Container Platform 4.20 4.20.9.6.202607221038-0
  • Red Hat Red Hat OpenShift Container Platform 4.21 4.21.9.6.202607221317-0
  • Red Hat Red Hat OpenShift Container Platform 4.22 4.22.9.8.202607152026-0
  • linux Debian 12 6.1.170-1
  • linux Debian 13 6.12.85-1
  • linux Debian 14 6.19.12-1

debian advisories DEBIAN-CVE-2026-43329

  • linux Ubuntu 22.04 LTS 5.15.0-186.196
  • linux Ubuntu 24.04 LTS 6.8.0-136.136
  • linux-aws Ubuntu 22.04 LTS 5.15.0-1112.119
  • linux-aws Ubuntu 24.04 LTS 6.8.0-1061.64
  • linux-gcp Ubuntu 22.04 LTS 5.15.0-1112.122
  • linux-gcp Ubuntu 24.04 LTS 6.8.0-1064.72
  • linux-gke Ubuntu 22.04 LTS 5.15.0-1108.114
  • linux-gke Ubuntu 24.04 LTS 6.8.0-1059.67

ubuntu advisories UBUNTU-CVE-2026-43329

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

  • kpatch-patch-4_18_0-553_85_1 RHEL 8 1-11.el8_10
  • kpatch-patch-4_18_0-553_53_1 RHEL 8 1-16.el8_10
  • kpatch-patch-4_18_0-553_72_1 RHEL 8 1-13.el8_10
  • kpatch-patch-4_18_0-553_109_1 RHEL 8 1-9.el8_10
  • kpatch-patch-4_18_0-553_125_1 RHEL 8 1-6.el8_10
  • kpatch-patch-5_14_0-687_10_1 RHEL 9 1-6.el9_8
  • kpatch-patch-6_12_0-211_16_1 RHEL 10.2 1-6.el10_2
  • kernel RHEL 9 5.14.0-687.19.1.el9_8

red hat advisories RHSA-2026:55761RHSA-2026:56225RHSA-2026:56224RHSA-2026:55837RHSA-2026:55762RHSA-2026:55763

  • kernel-default SLES for SAP 15 SP6, SLES 15 SP6-LTSS, SLE Live Patching 15 SP6 +1 more 6.4.0-150600.23.112.1
  • kernel-64kb SLE Module for Basesystem 15 SP7 6.4.0-150700.53.55.1
  • kernel-syms SLE Module for Development Tools 15 SP7 6.4.0-150700.53.55.1
  • kernel-azure SLE Module for Public Cloud 15 SP7 6.4.0-150700.53.55.1
  • kernel-source SLE Module for Development Tools 15 SP7, SLE Module for Basesystem 15 SP7 6.4.0-150700.53.55.1
  • kernel-default SLE Workstation Extension 15 SP7, SLE Module for Legacy 15 SP7, SLE Module for Basesystem 15 SP7 +2 more 6.4.0-150700.53.55.1
  • kernel-zfcpdump SLE Module for Basesystem 15 SP7 6.4.0-150700.53.55.1
  • kernel-obs-build SLE Module for Development Tools 15 SP7 6.4.0-150700.53.55.1

suse advisories SUSE-SU-2026:2195-1SUSE-SU-2026:2238-1SUSE-SU-2026:21834-1

  • kernel AlmaLinux 9 5.14.0-687.19.1.el9_8
  • rv AlmaLinux 9 5.14.0-687.19.1.el9_8
  • perf AlmaLinux 9 5.14.0-687.19.1.el9_8
  • rtla AlmaLinux 9 5.14.0-687.19.1.el9_8
  • libperf AlmaLinux 9 5.14.0-687.19.1.el9_8
  • kernel-rt AlmaLinux 9 5.14.0-687.19.1.el9_8
  • kernel-64k AlmaLinux 9 5.14.0-687.19.1.el9_8
  • kernel-core AlmaLinux 9 5.14.0-687.19.1.el9_8

almalinux advisories ALSA-2026:30848ALSA-2026:26427ALSA-2026:26428ALSA-2026:23329

  • kernel Rocky Linux 8 4.18.0-553.134.1.el8_10

rocky linux advisories RLSA-2026:26427

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-2026-43329 updated cvss 7.8

kernel: netfilter: flowtable: strictly check for maximum number of actions

  • 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 5.14.0-570.125.1.el9_6, kernel-debuginfo-common-s390x 5.14.0-570.125.1.el9_6, kernel-debuginfo-common-x86_64 5.14.0-570.125.1.el9_6, kernel-debuginfo-common-aarch64 5.14.0-570.125.1.el9_6, kernel-debuginfo-common-ppc64le 5.14.0-570.125.1.el9_6
    fixed: vendor fix RHSA-2026:34094
  • Red Hat Enterprise Linux AppStream (v. 9) rv 5.14.0-687.19.1.el9_8, perf 5.14.0-687.19.1.el9_8, rtla 5.14.0-687.19.1.el9_8, python3-perf 5.14.0-687.19.1.el9_8, kernel-devel-matched 5.14.0-687.19.1.el9_8, kernel-64k-devel-matched 5.14.0-687.19.1.el9_8, +7 more
    fixed: vendor fix RHSA-2026:30848
  • Red Hat Enterprise Linux AppStream (v. 10) rv 6.12.0-211.20.1.el10_2, perf 6.12.0-211.20.1.el10_2, rtla 6.12.0-211.20.1.el10_2, python3-perf 6.12.0-211.20.1.el10_2, kernel-devel-matched 6.12.0-211.20.1.el10_2, kernel-64k-devel-matched 6.12.0-211.20.1.el10_2, +7 more
    fixed: vendor fix RHSA-2026:23329
  • Red Hat Enterprise Linux AppStream E4S (v.9.2) perf 5.14.0-284.178.1.el9_2, rtla 5.14.0-284.178.1.el9_2, kernel-devel-matched 5.14.0-284.178.1.el9_2, kernel-64k-devel-matched 5.14.0-284.178.1.el9_2, kernel-debug-devel-matched 5.14.0-284.178.1.el9_2, kernel-debuginfo-common-s390x 5.14.0-284.178.1.el9_2, +5 more
    fixed: vendor fix RHSA-2026:34095
  • Red Hat Enterprise Linux AppStream E4S (v.9.4) rv 5.14.0-427.134.1.el9_4, perf 5.14.0-427.134.1.el9_4, rtla 5.14.0-427.134.1.el9_4, kernel-devel-matched 5.14.0-427.134.1.el9_4, kernel-64k-devel-matched 5.14.0-427.134.1.el9_4, kernel-debug-devel-matched 5.14.0-427.134.1.el9_4, +6 more
    fixed: vendor fix RHSA-2026:27713
  • Red Hat Enterprise Linux AppStream EUS (v. 10.0) rv 6.12.0-55.84.1.el10_0, perf 6.12.0-55.84.1.el10_0, rtla 6.12.0-55.84.1.el10_0, python3-perf 6.12.0-55.84.1.el10_0, kernel-devel-matched 6.12.0-55.84.1.el10_0, kernel-64k-devel-matched 6.12.0-55.84.1.el10_0, +7 more
    fixed: vendor fix RHSA-2026:33215
  • Red Hat Enterprise Linux AppStream EUS (v.9.6) rv 5.14.0-570.125.1.el9_6, perf 5.14.0-570.125.1.el9_6, rtla 5.14.0-570.125.1.el9_6, python3-perf 5.14.0-570.125.1.el9_6, kernel-devel-matched 5.14.0-570.125.1.el9_6, kernel-64k-devel-matched 5.14.0-570.125.1.el9_6, +7 more
    fixed: vendor fix RHSA-2026:34094
show 32 more
  • Red Hat Enterprise Linux BaseOS (v. 8) perf 4.18.0-553.134.1.el8_10, kernel 4.18.0-553.134.1.el8_10, bpftool 4.18.0-553.134.1.el8_10, kernel-core 4.18.0-553.134.1.el8_10, kernel-tools 4.18.0-553.134.1.el8_10, python3-perf 4.18.0-553.134.1.el8_10, +20 more
    fixed: vendor fix RHSA-2026:26427
  • Red Hat Enterprise Linux BaseOS (v. 9) kernel 5.14.0-687.19.1.el9_8, kernel-64k 5.14.0-687.19.1.el9_8, kernel-core 5.14.0-687.19.1.el9_8, kernel-tools 5.14.0-687.19.1.el9_8, kernel-modules 5.14.0-687.19.1.el9_8, kernel-64k-core 5.14.0-687.19.1.el9_8, +28 more
    fixed: vendor fix RHSA-2026:30848
  • Red Hat Enterprise Linux BaseOS (v. 10) kernel 6.12.0-211.20.1.el10_2, kernel-64k 6.12.0-211.20.1.el10_2, kernel-core 6.12.0-211.20.1.el10_2, kernel-tools 6.12.0-211.20.1.el10_2, kernel-modules 6.12.0-211.20.1.el10_2, kernel-64k-core 6.12.0-211.20.1.el10_2, +29 more
    fixed: vendor fix RHSA-2026:23329
  • Red Hat Enterprise Linux BaseOS AUS (v.8.4) perf 4.18.0-305.197.1.el8_4, kernel 4.18.0-305.197.1.el8_4, bpftool 4.18.0-305.197.1.el8_4, kernel-core 4.18.0-305.197.1.el8_4, kernel-tools 4.18.0-305.197.1.el8_4, python3-perf 4.18.0-305.197.1.el8_4, +8 more
    fixed: vendor fix RHSA-2026:35896
  • Red Hat Enterprise Linux BaseOS AUS (v.8.6) perf 4.18.0-372.198.1.el8_6, kernel 4.18.0-372.198.1.el8_6, bpftool 4.18.0-372.198.1.el8_6, kernel-core 4.18.0-372.198.1.el8_6, kernel-tools 4.18.0-372.198.1.el8_6, python3-perf 4.18.0-372.198.1.el8_6, +8 more
    fixed: vendor fix RHSA-2026:33899
  • Red Hat Enterprise Linux BaseOS E4S (v.8.8) perf 4.18.0-477.150.1.el8_8, kernel 4.18.0-477.150.1.el8_8, bpftool 4.18.0-477.150.1.el8_8, kernel-core 4.18.0-477.150.1.el8_8, kernel-tools 4.18.0-477.150.1.el8_8, python3-perf 4.18.0-477.150.1.el8_8, +14 more
    fixed: vendor fix RHSA-2026:35863
  • Red Hat Enterprise Linux BaseOS E4S (v.9.2) bpftool 7.0.0-284.178.1.el9_2, kernel 5.14.0-284.178.1.el9_2, kernel-64k 5.14.0-284.178.1.el9_2, kernel-core 5.14.0-284.178.1.el9_2, kernel-tools 5.14.0-284.178.1.el9_2, python3-perf 5.14.0-284.178.1.el9_2, +33 more
    fixed: vendor fix RHSA-2026:34095
  • Red Hat Enterprise Linux BaseOS E4S (v.9.4) bpftool 7.3.0-427.134.1.el9_4, kernel 5.14.0-427.134.1.el9_4, kernel-64k 5.14.0-427.134.1.el9_4, kernel-core 5.14.0-427.134.1.el9_4, kernel-tools 5.14.0-427.134.1.el9_4, python3-perf 5.14.0-427.134.1.el9_4, +33 more
    fixed: vendor fix RHSA-2026:27713
  • Red Hat Enterprise Linux BaseOS EUS (v. 10.0) kernel 6.12.0-55.84.1.el10_0, kernel-64k 6.12.0-55.84.1.el10_0, kernel-core 6.12.0-55.84.1.el10_0, kernel-tools 6.12.0-55.84.1.el10_0, kernel-modules 6.12.0-55.84.1.el10_0, kernel-64k-core 6.12.0-55.84.1.el10_0, +27 more
    fixed: vendor fix RHSA-2026:33215
  • Red Hat Enterprise Linux BaseOS EUS (v.9.6) kernel 5.14.0-570.125.1.el9_6, kernel-64k 5.14.0-570.125.1.el9_6, kernel-core 5.14.0-570.125.1.el9_6, kernel-tools 5.14.0-570.125.1.el9_6, kernel-modules 5.14.0-570.125.1.el9_6, kernel-64k-core 5.14.0-570.125.1.el9_6, +32 more
    fixed: vendor fix RHSA-2026:34094
  • Red Hat Enterprise Linux BaseOS EUS EXTENSION (v.8.4) perf 4.18.0-305.197.1.el8_4, kernel 4.18.0-305.197.1.el8_4, bpftool 4.18.0-305.197.1.el8_4, kernel-core 4.18.0-305.197.1.el8_4, kernel-tools 4.18.0-305.197.1.el8_4, python3-perf 4.18.0-305.197.1.el8_4, +8 more
    fixed: vendor fix RHSA-2026:35896
  • Red Hat Enterprise Linux BaseOS EUS EXTENSION (v.8.6) perf 4.18.0-372.198.1.el8_6, kernel 4.18.0-372.198.1.el8_6, bpftool 4.18.0-372.198.1.el8_6, kernel-core 4.18.0-372.198.1.el8_6, kernel-tools 4.18.0-372.198.1.el8_6, python3-perf 4.18.0-372.198.1.el8_6, +8 more
    fixed: vendor fix RHSA-2026:33899
  • Red Hat Enterprise Linux BaseOS TUS (v.8.8) perf 4.18.0-477.150.1.el8_8, kernel 4.18.0-477.150.1.el8_8, bpftool 4.18.0-477.150.1.el8_8, kernel-core 4.18.0-477.150.1.el8_8, kernel-tools 4.18.0-477.150.1.el8_8, python3-perf 4.18.0-477.150.1.el8_8, +8 more
    fixed: vendor fix RHSA-2026:35863
  • Red Hat Enterprise Linux CodeReady Linux Builder (v. 9) libperf 5.14.0-687.19.1.el9_8, kernel-debuginfo-common-s390x 5.14.0-687.19.1.el9_8, kernel-debuginfo-common-x86_64 5.14.0-687.19.1.el9_8, kernel-debuginfo-common-aarch64 5.14.0-687.19.1.el9_8, kernel-debuginfo-common-ppc64le 5.14.0-687.19.1.el9_8
    fixed: vendor fix RHSA-2026:30848
  • Red Hat Enterprise Linux CodeReady Linux Builder (v. 10) libperf 6.12.0-211.20.1.el10_2, kernel-debuginfo-common-s390x 6.12.0-211.20.1.el10_2, kernel-debuginfo-common-x86_64 6.12.0-211.20.1.el10_2, kernel-debuginfo-common-aarch64 6.12.0-211.20.1.el10_2, kernel-debuginfo-common-ppc64le 6.12.0-211.20.1.el10_2
    fixed: vendor fix RHSA-2026:23329
  • Red Hat Enterprise Linux CodeReady Linux Builder EUS (v. 10.0) libperf 6.12.0-55.84.1.el10_0, kernel-debuginfo-common-s390x 6.12.0-55.84.1.el10_0, kernel-debuginfo-common-x86_64 6.12.0-55.84.1.el10_0, kernel-debuginfo-common-aarch64 6.12.0-55.84.1.el10_0, kernel-debuginfo-common-ppc64le 6.12.0-55.84.1.el10_0
    fixed: vendor fix RHSA-2026:33215
  • Red Hat Enterprise Linux CRB (v. 8) kernel-debuginfo-common-x86_64 4.18.0-553.134.1.el8_10, kernel-debuginfo-common-aarch64 4.18.0-553.134.1.el8_10, kernel-debuginfo-common-ppc64le 4.18.0-553.134.1.el8_10
    fixed: vendor fix RHSA-2026:26427
  • Red Hat Enterprise Linux NFV (v. 8) kernel-rt 4.18.0-553.134.1.rt7.475.el8_10, kernel-rt-kvm 4.18.0-553.134.1.rt7.475.el8_10, kernel-rt-core 4.18.0-553.134.1.rt7.475.el8_10, kernel-rt-modules 4.18.0-553.134.1.rt7.475.el8_10, kernel-rt-debug-kvm 4.18.0-553.134.1.rt7.475.el8_10, kernel-rt-debug-core 4.18.0-553.134.1.rt7.475.el8_10, +4 more
    fixed: vendor fix RHSA-2026:26428
  • Red Hat Enterprise Linux Real Time (v. 9) kernel-rt 5.14.0-687.19.1.el9_8, kernel-rt-64k 5.14.0-687.19.1.el9_8, kernel-rt-core 5.14.0-687.19.1.el9_8, kernel-rt-modules 5.14.0-687.19.1.el9_8, kernel-rt-64k-core 5.14.0-687.19.1.el9_8, kernel-rt-debug-core 5.14.0-687.19.1.el9_8, +14 more
    fixed: vendor fix RHSA-2026:30848
  • Red Hat Enterprise Linux Real Time (v. 10) kernel-rt 6.12.0-211.20.1.el10_2, kernel-rt-64k 6.12.0-211.20.1.el10_2, kernel-rt-core 6.12.0-211.20.1.el10_2, kernel-rt-modules 6.12.0-211.20.1.el10_2, kernel-rt-64k-core 6.12.0-211.20.1.el10_2, kernel-rt-debug-core 6.12.0-211.20.1.el10_2, +14 more
    fixed: vendor fix RHSA-2026:23329
  • Red Hat Enterprise Linux Real Time E4S (v.9.2) kernel-rt 5.14.0-284.178.1.rt14.463.el9_2, kernel-rt-core 5.14.0-284.178.1.rt14.463.el9_2, kernel-rt-modules 5.14.0-284.178.1.rt14.463.el9_2, kernel-rt-debug-core 5.14.0-284.178.1.rt14.463.el9_2, kernel-rt-modules-core 5.14.0-284.178.1.rt14.463.el9_2, kernel-rt-debug-modules 5.14.0-284.178.1.rt14.463.el9_2, +4 more
    fixed: vendor fix RHSA-2026:33900
  • Red Hat Enterprise Linux Real Time E4S (v.9.4) kernel-rt 5.14.0-427.134.1.el9_4, kernel-rt-core 5.14.0-427.134.1.el9_4, kernel-rt-modules 5.14.0-427.134.1.el9_4, kernel-rt-debug-core 5.14.0-427.134.1.el9_4, kernel-rt-modules-core 5.14.0-427.134.1.el9_4, kernel-rt-debug-modules 5.14.0-427.134.1.el9_4, +4 more
    fixed: vendor fix RHSA-2026:27713
  • Red Hat Enterprise Linux Real Time EUS (v. 10.0) kernel-rt 6.12.0-55.84.1.el10_0, kernel-rt-64k 6.12.0-55.84.1.el10_0, kernel-rt-core 6.12.0-55.84.1.el10_0, kernel-rt-modules 6.12.0-55.84.1.el10_0, kernel-rt-64k-core 6.12.0-55.84.1.el10_0, kernel-rt-debug-core 6.12.0-55.84.1.el10_0, +14 more
    fixed: vendor fix RHSA-2026:33215
  • Red Hat Enterprise Linux Real Time EUS (v.9.6) kernel-rt 5.14.0-570.125.1.el9_6, kernel-rt-64k 5.14.0-570.125.1.el9_6, kernel-rt-core 5.14.0-570.125.1.el9_6, kernel-rt-modules 5.14.0-570.125.1.el9_6, kernel-rt-64k-core 5.14.0-570.125.1.el9_6, kernel-rt-debug-core 5.14.0-570.125.1.el9_6, +14 more
    fixed: vendor fix RHSA-2026:34094
  • Red Hat Enterprise Linux Real Time for NFV (v. 9) kernel-rt 5.14.0-687.19.1.el9_8, kernel-rt-core 5.14.0-687.19.1.el9_8, kernel-rt-modules 5.14.0-687.19.1.el9_8, kernel-rt-debug-core 5.14.0-687.19.1.el9_8, kernel-rt-modules-core 5.14.0-687.19.1.el9_8, kernel-rt-debug-modules 5.14.0-687.19.1.el9_8, +4 more
    fixed: vendor fix RHSA-2026:30848
  • Red Hat Enterprise Linux Real Time for NFV (v. 10) kernel-rt 6.12.0-211.20.1.el10_2, kernel-rt-core 6.12.0-211.20.1.el10_2, kernel-rt-modules 6.12.0-211.20.1.el10_2, kernel-rt-debug-core 6.12.0-211.20.1.el10_2, kernel-rt-modules-core 6.12.0-211.20.1.el10_2, kernel-rt-debug-modules 6.12.0-211.20.1.el10_2, +4 more
    fixed: vendor fix RHSA-2026:23329
  • Red Hat Enterprise Linux Real Time for NFV E4S (v.9.2) kernel-rt 5.14.0-284.178.1.rt14.463.el9_2, kernel-rt-kvm 5.14.0-284.178.1.rt14.463.el9_2, kernel-rt-core 5.14.0-284.178.1.rt14.463.el9_2, kernel-rt-modules 5.14.0-284.178.1.rt14.463.el9_2, kernel-rt-debug-kvm 5.14.0-284.178.1.rt14.463.el9_2, kernel-rt-debug-core 5.14.0-284.178.1.rt14.463.el9_2, +6 more
    fixed: vendor fix RHSA-2026:33900
  • Red Hat Enterprise Linux Real Time for NFV E4S (v.9.4) kernel-rt 5.14.0-427.134.1.el9_4, kernel-rt-kvm 5.14.0-427.134.1.el9_4, kernel-rt-core 5.14.0-427.134.1.el9_4, kernel-rt-modules 5.14.0-427.134.1.el9_4, kernel-rt-debug-kvm 5.14.0-427.134.1.el9_4, kernel-rt-debug-core 5.14.0-427.134.1.el9_4, +6 more
    fixed: vendor fix RHSA-2026:27713
  • Red Hat Enterprise Linux Real Time for NFV EUS (v. 10.0) kernel-rt 6.12.0-55.84.1.el10_0, kernel-rt-kvm 6.12.0-55.84.1.el10_0, kernel-rt-core 6.12.0-55.84.1.el10_0, kernel-rt-modules 6.12.0-55.84.1.el10_0, kernel-rt-debug-kvm 6.12.0-55.84.1.el10_0, kernel-rt-debug-core 6.12.0-55.84.1.el10_0, +6 more
    fixed: vendor fix RHSA-2026:33215
  • Red Hat Enterprise Linux Real Time for NFV EUS (v.9.6) kernel-rt 5.14.0-570.125.1.el9_6, kernel-rt-kvm 5.14.0-570.125.1.el9_6, kernel-rt-core 5.14.0-570.125.1.el9_6, kernel-rt-modules 5.14.0-570.125.1.el9_6, kernel-rt-debug-kvm 5.14.0-570.125.1.el9_6, kernel-rt-debug-core 5.14.0-570.125.1.el9_6, +6 more
    fixed: vendor fix RHSA-2026:34094
  • Red Hat Enterprise Linux RT (v. 8) kernel-rt 4.18.0-553.134.1.rt7.475.el8_10, kernel-rt-core 4.18.0-553.134.1.rt7.475.el8_10, kernel-rt-modules 4.18.0-553.134.1.rt7.475.el8_10, kernel-rt-debug-core 4.18.0-553.134.1.rt7.475.el8_10, kernel-rt-debug-modules 4.18.0-553.134.1.rt7.475.el8_10, kernel-rt-modules-extra 4.18.0-553.134.1.rt7.475.el8_10, +2 more
    fixed: vendor fix RHSA-2026:26428
  • Red Hat OpenShift Container Platform 4.12 rhcos 412.86.202607211933
    fixed: vendor fix RHSA-2026:47702

10 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
total
Assessed
23 d ago

Exploit prediction

0.18% chance of exploitation in the next 30 days, higher than 7% 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
CISA ADP 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
  • Red Hat Red Hat Enterprise Linux 10
  • Red Hat Red Hat Enterprise Linux 10.0 Extended Update Support
  • Red Hat Red Hat Enterprise Linux 8
  • Red Hat Red Hat Enterprise Linux 8.4 Advanced Mission Critical Update Support
  • Red Hat Red Hat Enterprise Linux 8.4 Extended Update Support Long-Life Add-On
  • Red Hat Red Hat Enterprise Linux 8.6 Advanced Mission Critical Update Support
  • Red Hat Red Hat Enterprise Linux 8.6 Extended Update Support Long-Life Add-On
  • Red Hat Red Hat Enterprise Linux 8.8 Telecommunications Update Service
  • Red Hat Red Hat Enterprise Linux 8.8 Update Services for SAP Solutions
  • Red Hat Red Hat Enterprise Linux 9
  • Red Hat Red Hat Enterprise Linux 9.2 Update Services for SAP Solutions
  • Red Hat Red Hat Enterprise Linux 9.4 Update Services for SAP Solutions
  • Red Hat Red Hat Enterprise Linux 9.6 Extended Update Support
  • Red Hat Red Hat OpenShift Container Platform 4.12
  • Red Hat Red Hat OpenShift Container Platform 4.13
  • Red Hat Red Hat OpenShift Container Platform 4.14
  • Red Hat Red Hat OpenShift Container Platform 4.15
  • Red Hat Red Hat OpenShift Container Platform 4.16
  • Red Hat Red Hat OpenShift Container Platform 4.17
  • Red Hat Red Hat OpenShift Container Platform 4.18
  • Red Hat Red Hat OpenShift Container Platform 4.19
  • Red Hat Red Hat OpenShift Container Platform 4.20
  • Red Hat Red Hat OpenShift Container Platform 4.21
  • Red Hat Red Hat OpenShift Container Platform 4.22
  • Red Hat Red Hat Enterprise Linux 6
  • Red Hat Red Hat Enterprise Linux 7
  • Red Hat Red Hat OpenShift Container Platform 4

Classification

Weakness
  • CWE-770 Allocation of Resources Without Limits or Throttling
  • CWE-122 Heap-based Buffer Overflow
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.