Skip to content
Fencer Vulns
critical 9.8

CVE-2026-43198 in the critical feed json

tcp: fix potential race in tcp_v6_syn_recv_sock()

published 2026-05-06 6 mo ago modified 2026-10-19 20 d ago also EUVD-2026-27757

cvss
9.8
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
0.3%
EPSS 0.3% chance of exploitation in 30 days, percentile 22%
public exploits
0
none known

Summary

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

tcp: fix potential race in tcp_v6_syn_recv_sock()

Code in tcp_v6_syn_recv_sock() after the call to tcp_v4_syn_recv_sock() is done too late.

After tcp_v4_syn_recv_sock(), the child socket is already visible from TCP ehash table and other cpus might use it.

Since newinet->pinet6 is still pointing to the listener ipv6_pinfo bad things can happen as syzbot found.

Move the problematic code in tcp_v6_mapped_child_init() and call this new helper from tcp_v4_syn_recv_sock() before the ehash insertion.

This allows the removal of one tcp_sync_mss(), since tcp_v4_syn_recv_sock() will call it with the correct context.

Patch / fix

  • Linux Linux 5.10.270, 5.15.221, 6.1.188, 6.6.157, 6.12.110, 6.18.16, 6.19.6, 7.0
  • Red Hat Red Hat Enterprise Linux 10 0:6.12.0-211.28.1.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 7 Extended Lifecycle Support 0:3.10.0-1160.155.1.el7, 0:3.10.0-1160.155.1.rt56.1307.el7
  • Red Hat Red Hat Enterprise Linux 8 0:4.18.0-553.140.1.el8_10, 0:4.18.0-553.140.1.rt7.481.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 0:4.18.0-372.199.1.el8_6
  • Red Hat Red Hat Enterprise Linux 8.6 Extended Update Support Long-Life Add-On 0:4.18.0-372.199.1.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 0:5.14.0-687.20.1.el9_8
  • Red Hat Red Hat Enterprise Linux 9.2 Update Services for SAP Solutions 0:5.14.0-284.179.1.el9_2, 0:5.14.0-284.179.1.rt14.464.el9_2
  • Red Hat Red Hat Enterprise Linux 9.4 Update Services for SAP Solutions 0:5.14.0-427.135.1.el9_4
  • Red Hat Red Hat Enterprise Linux 9.6 Extended Update Support 0:5.14.0-570.125.1.el9_6
  • linux Debian 12 6.1.190-1
  • linux Debian 13 6.12.111-1
  • linux Debian 14 6.19.6-1
  • linux-6.12 Debian 12 6.12.111-1~deb12u1

debian advisories DEBIAN-CVE-2026-43198

  • linux Ubuntu 22.04 LTS 5.15.0-187.197
  • linux Ubuntu 24.04 LTS 6.8.0-137.137
  • linux-aws Ubuntu 22.04 LTS 5.15.0-1113.120
  • linux-aws Ubuntu 24.04 LTS 6.8.0-1062.65
  • linux-gcp Ubuntu 22.04 LTS 5.15.0-1114.124
  • linux-gcp Ubuntu 24.04 LTS 6.8.0-1065.73
  • linux-gke Ubuntu 22.04 LTS 5.15.0-1110.116
  • linux-gke Ubuntu 24.04 LTS 6.8.0-1060.68

ubuntu advisories UBUNTU-CVE-2026-43198

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-rt RHEL 8 4.18.0-553.140.1.rt7.481.el8_10
  • kernel-rt-kvm RHEL 8 4.18.0-553.140.1.rt7.481.el8_10
  • kernel-rt-core RHEL 8 4.18.0-553.140.1.rt7.481.el8_10
  • kernel-rt-modules RHEL 8 4.18.0-553.140.1.rt7.481.el8_10
  • kernel-rt-debug-kvm RHEL 8 4.18.0-553.140.1.rt7.481.el8_10
  • kernel-rt-debug-core RHEL 8 4.18.0-553.140.1.rt7.481.el8_10
  • kernel-rt-debug-modules RHEL 8 4.18.0-553.140.1.rt7.481.el8_10
  • kernel-rt-modules-extra RHEL 8 4.18.0-553.140.1.rt7.481.el8_10

red hat advisories RHSA-2026:41236RHSA-2026:36348RHSA-2026:36349RHSA-2026:36216RHSA-2026:36073RHSA-2026:35904

  • kernel-syms SLES 16.0, Linux Micro Extras 6.2, SLES for SAP applications 16.0 6.12.0-160000.36.1
  • kernel-obs-build Linux Micro Extras 6.2 6.12.0-160000.36.1
  • kernel-rt Linux Micro 6.2 6.12.0-160000.36.1
  • kernel-64kb SLES 16.0, Linux Micro 6.2, SLES for SAP applications 16.0 6.12.0-160000.36.1
  • kernel-source SLES 16.0, Linux Micro 6.2, SLES for SAP applications 16.0 6.12.0-160000.36.1
  • kernel-default SLES 16.0, SLE High Availability Extension 16.0, Linux Micro 6.2 +1 more 6.12.0-160000.36.1
  • kernel-default-base SLES 16.0, Linux Micro 6.2, SLES for SAP applications 16.0 6.12.0-160000.36.1.160000.2.17
  • kernel-azure SLES for SAP applications 16.0, SLES 16.0 6.12.0-160000.36.1

suse advisories SUSE-SU-2026:22742-1SUSE-SU-2026:22769-1SUSE-SU-2026:22835-1SUSE-SU-2026:22812-1SUSE-SU-2026:2839-1SUSE-SU-2026:2799-1

  • kernel-rt openSUSE Leap 16.0 6.12.0-160000.36.1
  • dtb-aarch64 openSUSE Leap 16.0 6.12.0-160000.36.1
  • kernel-64kb openSUSE Leap 16.0 6.12.0-160000.36.1
  • kernel-syms openSUSE Leap 16.0 6.12.0-160000.36.1
  • kernel-azure openSUSE Leap 16.0 6.12.0-160000.36.1
  • kernel-obs-qa openSUSE Leap 16.0 6.12.0-160000.36.1
  • kernel-source openSUSE Leap 16.0 6.12.0-160000.36.1
  • kernel-default openSUSE Leap 16.0 6.12.0-160000.36.1

opensuse advisories openSUSE-SU-2026:21388-1

  • kernel-rt AlmaLinux 8 4.18.0-553.140.1.rt7.481.el8_10
  • kernel-rt-core AlmaLinux 8 4.18.0-553.140.1.rt7.481.el8_10
  • kernel-rt-modules AlmaLinux 8 4.18.0-553.140.1.rt7.481.el8_10
  • kernel-rt-debug-core AlmaLinux 8 4.18.0-553.140.1.rt7.481.el8_10
  • kernel-rt-debug-modules AlmaLinux 8 4.18.0-553.140.1.rt7.481.el8_10
  • kernel-rt-modules-extra AlmaLinux 8 4.18.0-553.140.1.rt7.481.el8_10
  • kernel-rt-debug-modules-extra AlmaLinux 8 4.18.0-553.140.1.rt7.481.el8_10
  • kernel AlmaLinux 8 4.18.0-553.140.1.el8_10

almalinux advisories ALSA-2026:36348ALSA-2026:36349ALSA-2026:33285ALSA-2026:30129

  • kernel Rocky Linux 10 6.12.0-211.28.1.el10_2

rocky linux advisories RLSA-2026:30129

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-2026-43198 updated cvss 7.0

kernel: tcp: fix potential race in tcp_v6_syn_recv_sock()

  • 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 Enterprise Linux 6 perf, kernel, python-perf, kernel-kdump, kernel-firmware, kernel-bootwrapper, +1 more
    under investigation
  • 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 5.14.0-687.20.1.el9_8, perf 5.14.0-687.20.1.el9_8, rtla 5.14.0-687.20.1.el9_8, python3-perf 5.14.0-687.20.1.el9_8, kernel-devel-matched 5.14.0-687.20.1.el9_8, kernel-64k-devel-matched 5.14.0-687.20.1.el9_8, +7 more
    fixed: vendor fix RHSA-2026:33285
  • Red Hat Enterprise Linux AppStream (v. 10) rv 6.12.0-211.28.1.el10_2, perf 6.12.0-211.28.1.el10_2, rtla 6.12.0-211.28.1.el10_2, python3-perf 6.12.0-211.28.1.el10_2, kernel-devel-matched 6.12.0-211.28.1.el10_2, kernel-64k-devel-matched 6.12.0-211.28.1.el10_2, +7 more
    fixed: vendor fix RHSA-2026:30129
  • Red Hat Enterprise Linux AppStream E4S (v.9.2) perf 5.14.0-284.179.1.el9_2, rtla 5.14.0-284.179.1.el9_2, kernel-devel-matched 5.14.0-284.179.1.el9_2, kernel-64k-devel-matched 5.14.0-284.179.1.el9_2, kernel-debug-devel-matched 5.14.0-284.179.1.el9_2, kernel-debuginfo-common-s390x 5.14.0-284.179.1.el9_2, +5 more
    fixed: vendor fix RHSA-2026:36073
  • Red Hat Enterprise Linux AppStream E4S (v.9.4) rv 5.14.0-427.135.1.el9_4, perf 5.14.0-427.135.1.el9_4, rtla 5.14.0-427.135.1.el9_4, kernel-devel-matched 5.14.0-427.135.1.el9_4, kernel-64k-devel-matched 5.14.0-427.135.1.el9_4, kernel-debug-devel-matched 5.14.0-427.135.1.el9_4, +6 more
    fixed: vendor fix RHSA-2026:34443
  • 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
show 32 more
  • 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
  • Red Hat Enterprise Linux BaseOS (v. 8) perf 4.18.0-553.140.1.el8_10, kernel 4.18.0-553.140.1.el8_10, bpftool 4.18.0-553.140.1.el8_10, kernel-core 4.18.0-553.140.1.el8_10, kernel-tools 4.18.0-553.140.1.el8_10, python3-perf 4.18.0-553.140.1.el8_10, +15 more
    fixed: vendor fix RHSA-2026:36349
  • Red Hat Enterprise Linux BaseOS (v. 9) kernel 5.14.0-687.20.1.el9_8, kernel-64k 5.14.0-687.20.1.el9_8, kernel-core 5.14.0-687.20.1.el9_8, kernel-tools 5.14.0-687.20.1.el9_8, kernel-modules 5.14.0-687.20.1.el9_8, kernel-64k-core 5.14.0-687.20.1.el9_8, +27 more
    fixed: vendor fix RHSA-2026:33285
  • Red Hat Enterprise Linux BaseOS (v. 10) kernel 6.12.0-211.28.1.el10_2, kernel-64k 6.12.0-211.28.1.el10_2, kernel-core 6.12.0-211.28.1.el10_2, kernel-tools 6.12.0-211.28.1.el10_2, kernel-modules 6.12.0-211.28.1.el10_2, kernel-64k-core 6.12.0-211.28.1.el10_2, +28 more
    fixed: vendor fix RHSA-2026:30129
  • 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 4.18.0-372.199.1.el8_6, kernel 4.18.0-372.199.1.el8_6, bpftool 4.18.0-372.199.1.el8_6, kernel-core 4.18.0-372.199.1.el8_6, kernel-tools 4.18.0-372.199.1.el8_6, python3-perf 4.18.0-372.199.1.el8_6, +8 more
    fixed: vendor fix RHSA-2026:35894
  • 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, +9 more
    fixed: vendor fix RHSA-2026:35863
  • Red Hat Enterprise Linux BaseOS E4S (v.9.2) bpftool 7.0.0-284.179.1.el9_2, kernel 5.14.0-284.179.1.el9_2, kernel-64k 5.14.0-284.179.1.el9_2, kernel-core 5.14.0-284.179.1.el9_2, kernel-tools 5.14.0-284.179.1.el9_2, python3-perf 5.14.0-284.179.1.el9_2, +28 more
    fixed: vendor fix RHSA-2026:36073
  • Red Hat Enterprise Linux BaseOS E4S (v.9.4) bpftool 7.3.0-427.135.1.el9_4, kernel 5.14.0-427.135.1.el9_4, kernel-64k 5.14.0-427.135.1.el9_4, kernel-core 5.14.0-427.135.1.el9_4, kernel-tools 5.14.0-427.135.1.el9_4, python3-perf 5.14.0-427.135.1.el9_4, +28 more
    fixed: vendor fix RHSA-2026:34443
  • 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, +27 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 4.18.0-372.199.1.el8_6, kernel 4.18.0-372.199.1.el8_6, bpftool 4.18.0-372.199.1.el8_6, kernel-core 4.18.0-372.199.1.el8_6, kernel-tools 4.18.0-372.199.1.el8_6, python3-perf 4.18.0-372.199.1.el8_6, +8 more
    fixed: vendor fix RHSA-2026:35894
  • 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 5.14.0-687.20.1.el9_8, kernel-debuginfo-common-s390x 5.14.0-687.20.1.el9_8, kernel-debuginfo-common-x86_64 5.14.0-687.20.1.el9_8, kernel-debuginfo-common-aarch64 5.14.0-687.20.1.el9_8, kernel-debuginfo-common-ppc64le 5.14.0-687.20.1.el9_8
    fixed: vendor fix RHSA-2026:33285
  • Red Hat Enterprise Linux CodeReady Linux Builder (v. 10) libperf 6.12.0-211.28.1.el10_2, kernel-debuginfo-common-s390x 6.12.0-211.28.1.el10_2, kernel-debuginfo-common-x86_64 6.12.0-211.28.1.el10_2, kernel-debuginfo-common-aarch64 6.12.0-211.28.1.el10_2, kernel-debuginfo-common-ppc64le 6.12.0-211.28.1.el10_2
    fixed: vendor fix RHSA-2026:30129
  • 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 4.18.0-553.140.1.el8_10, kernel-debuginfo-common-aarch64 4.18.0-553.140.1.el8_10, kernel-debuginfo-common-ppc64le 4.18.0-553.140.1.el8_10
    fixed: vendor fix RHSA-2026:36349
  • Red Hat Enterprise Linux for Real Time (v. 7 ELS) kernel-rt 3.10.0-1160.155.1.rt56.1307.el7, kernel-rt-trace 3.10.0-1160.155.1.rt56.1307.el7, kernel-rt-debuginfo-common-x86_64 3.10.0-1160.155.1.rt56.1307.el7
    fixed: vendor fix RHSA-2026:41236
  • Red Hat Enterprise Linux NFV (v. 8) kernel-rt 4.18.0-553.140.1.rt7.481.el8_10, kernel-rt-kvm 4.18.0-553.140.1.rt7.481.el8_10, kernel-rt-core 4.18.0-553.140.1.rt7.481.el8_10, kernel-rt-modules 4.18.0-553.140.1.rt7.481.el8_10, kernel-rt-debug-kvm 4.18.0-553.140.1.rt7.481.el8_10, kernel-rt-debug-core 4.18.0-553.140.1.rt7.481.el8_10, +4 more
    fixed: vendor fix RHSA-2026:36348
  • Red Hat Enterprise Linux Real Time (v. 9) kernel-rt 5.14.0-687.20.1.el9_8, kernel-rt-64k 5.14.0-687.20.1.el9_8, kernel-rt-core 5.14.0-687.20.1.el9_8, kernel-rt-modules 5.14.0-687.20.1.el9_8, kernel-rt-64k-core 5.14.0-687.20.1.el9_8, kernel-rt-debug-core 5.14.0-687.20.1.el9_8, +14 more
    fixed: vendor fix RHSA-2026:33285
  • Red Hat Enterprise Linux Real Time (v. 10) kernel-rt 6.12.0-211.28.1.el10_2, kernel-rt-64k 6.12.0-211.28.1.el10_2, kernel-rt-core 6.12.0-211.28.1.el10_2, kernel-rt-modules 6.12.0-211.28.1.el10_2, kernel-rt-64k-core 6.12.0-211.28.1.el10_2, kernel-rt-debug-core 6.12.0-211.28.1.el10_2, +14 more
    fixed: vendor fix RHSA-2026:30129
  • Red Hat Enterprise Linux Real Time E4S (v.9.2) kernel-rt 5.14.0-284.179.1.rt14.464.el9_2, kernel-rt-core 5.14.0-284.179.1.rt14.464.el9_2, kernel-rt-modules 5.14.0-284.179.1.rt14.464.el9_2, kernel-rt-debug-core 5.14.0-284.179.1.rt14.464.el9_2, kernel-rt-modules-core 5.14.0-284.179.1.rt14.464.el9_2, kernel-rt-debug-modules 5.14.0-284.179.1.rt14.464.el9_2, +4 more
    fixed: vendor fix RHSA-2026:35904
  • Red Hat Enterprise Linux Real Time E4S (v.9.4) kernel-rt 5.14.0-427.135.1.el9_4, kernel-rt-core 5.14.0-427.135.1.el9_4, kernel-rt-modules 5.14.0-427.135.1.el9_4, kernel-rt-debug-core 5.14.0-427.135.1.el9_4, kernel-rt-modules-core 5.14.0-427.135.1.el9_4, kernel-rt-debug-modules 5.14.0-427.135.1.el9_4, +4 more
    fixed: vendor fix RHSA-2026:34443
  • 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 5.14.0-687.20.1.el9_8, kernel-rt-core 5.14.0-687.20.1.el9_8, kernel-rt-modules 5.14.0-687.20.1.el9_8, kernel-rt-debug-core 5.14.0-687.20.1.el9_8, kernel-rt-modules-core 5.14.0-687.20.1.el9_8, kernel-rt-debug-modules 5.14.0-687.20.1.el9_8, +4 more
    fixed: vendor fix RHSA-2026:33285
  • Red Hat Enterprise Linux Real Time for NFV (v. 10) kernel-rt 6.12.0-211.28.1.el10_2, kernel-rt-core 6.12.0-211.28.1.el10_2, kernel-rt-modules 6.12.0-211.28.1.el10_2, kernel-rt-debug-core 6.12.0-211.28.1.el10_2, kernel-rt-modules-core 6.12.0-211.28.1.el10_2, kernel-rt-debug-modules 6.12.0-211.28.1.el10_2, +4 more
    fixed: vendor fix RHSA-2026:30129
  • Red Hat Enterprise Linux Real Time for NFV E4S (v.9.2) kernel-rt 5.14.0-284.179.1.rt14.464.el9_2, kernel-rt-kvm 5.14.0-284.179.1.rt14.464.el9_2, kernel-rt-core 5.14.0-284.179.1.rt14.464.el9_2, kernel-rt-modules 5.14.0-284.179.1.rt14.464.el9_2, kernel-rt-debug-kvm 5.14.0-284.179.1.rt14.464.el9_2, kernel-rt-debug-core 5.14.0-284.179.1.rt14.464.el9_2, +6 more
    fixed: vendor fix RHSA-2026:35904
  • Red Hat Enterprise Linux Real Time for NFV E4S (v.9.4) kernel-rt 5.14.0-427.135.1.el9_4, kernel-rt-kvm 5.14.0-427.135.1.el9_4, kernel-rt-core 5.14.0-427.135.1.el9_4, kernel-rt-modules 5.14.0-427.135.1.el9_4, kernel-rt-debug-kvm 5.14.0-427.135.1.el9_4, kernel-rt-debug-core 5.14.0-427.135.1.el9_4, +6 more
    fixed: vendor fix RHSA-2026:34443
  • 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

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 SSVC

Exploitation
none
Automatable
yes
Technical impact
total
Assessed
24 d ago

Exploit prediction

0.30% chance of exploitation in the next 30 days, higher than 22% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by version score vector
CNA 3.1 9.8 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
CISA ADP 3.1 7.0 CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H
CNA 3.1 7.0 CVSS:3.1/AV:L/AC:H/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 7 Extended Lifecycle 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 Enterprise Linux 6

Classification

Weakness
  • CWE-821 Incorrect Synchronization
  • 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.