Skip to content
Fencer Vulns
critical 9.8

CVE-2025-40258 in the critical feed json

mptcp: fix race condition in mptcp_schedule_work()

published 2025-12-04 11 mo ago modified 2026-10-19 20 d ago also EUVD-2025-201199

cvss
9.8
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
0.5%
EPSS 0.5% chance of exploitation in 30 days, percentile 42%
public exploits
0
none known

Summary

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

mptcp: fix race condition in mptcp_schedule_work()

syzbot reported use-after-free in mptcp_schedule_work() [1]

Issue here is that mptcp_schedule_work() schedules a work, then gets a refcount on sk->sk_refcnt if the work was scheduled. This refcount will be released by mptcp_worker().

[A] if (schedule_work(...)) { [B] sock_hold(sk); return true; }

Problem is that mptcp_worker() can run immediately and complete before [B]

We need instead :

sock_hold(sk); if (schedule_work(...)) return true; sock_put(sk);

[1] refcount_t: addition on 0; use-after-free. WARNING: CPU: 1 PID: 29 at lib/refcount.c:25 refcount_warn_saturate+0xfa/0x1d0 lib/refcount.c:25 Call Trace: <TASK> __refcount_add include/linux/refcount.h:-1 [inline] __refcount_inc include/linux/refcount.h:366 [inline] refcount_inc include/linux/refcount.h:383 [inline] sock_hold include/net/sock.h:816 [inline] mptcp_schedule_work+0x164/0x1a0 net/mptcp/protocol.c:943 mptcp_tout_timer+0x21/0xa0 net/mptcp/protocol.c:2316 call_timer_fn+0x17e/0x5f0 kernel/time/timer.c:1747 expire_timers kernel/time/timer.c:1798 [inline] __run_timers kernel/time/timer.c:2372 [inline] __run_timer_base+0x648/0x970 kernel/time/timer.c:2384 run_timer_base kernel/time/timer.c:2393 [inline] run_timer_softirq+0xb7/0x180 kernel/time/timer.c:2403 handle_softirqs+0x22f/0x710 kernel/softirq.c:622 __do_softirq kernel/softirq.c:656 [inline] run_ktimerd+0xcf/0x190 kernel/softirq.c:1138 smpboot_thread_fn+0x542/0xa60 kernel/smpboot.c:160 kthread+0x711/0x8a0 kernel/kthread.c:463 ret_from_fork+0x4bc/0x870 arch/x86/kernel/process.c:158 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245

Patch / fix

  • Linux Linux 5.10.247, 5.15.197, 6.1.159, 6.6.118, 6.12.60, 6.17.10, 6.18
  • Siemens RUGGEDCOM RST2428P V4.0
  • linux Debian 12 6.1.159-1
  • linux Debian 13 6.12.63-1
  • linux Debian 14 6.17.10-1

debian advisories DEBIAN-CVE-2025-40258

  • linux Ubuntu 22.04 LTS 5.15.0-173.183
  • linux Ubuntu 24.04 LTS 6.8.0-106.106
  • linux Ubuntu 25.10 6.17.0-19.19
  • linux-aws Ubuntu 22.04 LTS 5.15.0-1103.110
  • linux-aws Ubuntu 24.04 LTS 6.8.0-1050.53
  • linux-aws Ubuntu 25.10 6.17.0-1009.9
  • linux-gcp Ubuntu 22.04 LTS 5.15.0-1103.112
  • linux-gcp Ubuntu 24.04 LTS 6.8.0-1052.55

ubuntu advisories UBUNTU-CVE-2025-40258

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 10.1 6.12.0-124.31.1.el10_1
  • rv RHEL 10.1 6.12.0-124.31.1.el10_1
  • perf RHEL 10.1 6.12.0-124.31.1.el10_1
  • rtla RHEL 10.1 6.12.0-124.31.1.el10_1
  • libperf RHEL 10.1 6.12.0-124.31.1.el10_1
  • kernel-rt RHEL 10.1 6.12.0-124.31.1.el10_1
  • kernel-64k RHEL 10.1 6.12.0-124.31.1.el10_1
  • kernel-core RHEL 10.1 6.12.0-124.31.1.el10_1

red hat advisories RHSA-2026:2583RHSA-2026:2560RHSA-2026:2535RHSA-2026:2490RHSA-2026:1727RHSA-2026:1690

  • kernel-livepatch-SLE16_Update_2 SLES 16.0, Linux Micro 6.2, SLES for SAP applications 16.0 4-160000.1.1
  • kernel-livepatch-SLE16_Update_1 SLES 16.0, Linux Micro 6.2, SLES for SAP applications 16.0 6-160000.1.1
  • kernel-livepatch-SLE16_Update_0 SLES 16.0, Linux Micro 6.2, SLES for SAP applications 16.0 8-160000.4.3
  • kernel-livepatch-SLE16_Update_3 SLES 16.0, Linux Micro 6.2, SLES for SAP applications 16.0 3-160000.1.1
  • kernel-livepatch-MICRO-6-0_Update_13 Linux Micro 6.1, Linux Micro 6.0 4-1.1
  • kernel-livepatch-MICRO-6-0_Update_14 Linux Micro 6.1, Linux Micro 6.0 2-1.2
  • kernel-livepatch-MICRO-6-0_Update_11 Linux Micro 6.1, Linux Micro 6.0 6-1.1
  • kernel-livepatch-MICRO-6-0_Update_12 Linux Micro 6.1, Linux Micro 6.0 6-1.1

suse advisories SUSE-SU-2026:1136-1SUSE-SU-2026:1132-1SUSE-SU-2026:1125-1SUSE-SU-2026:1099-1SUSE-SU-2026:1096-1SUSE-SU-2026:1101-1

  • kernel-rt openSUSE Leap 16.0 6.12.0-160000.9.1
  • dtb-aarch64 openSUSE Leap 16.0 6.12.0-160000.9.1
  • kernel-64kb openSUSE Leap 16.0 6.12.0-160000.9.1
  • kernel-syms openSUSE Leap 16.0 6.12.0-160000.9.1
  • kernel-azure openSUSE Leap 16.0 6.12.0-160000.9.1
  • kernel-obs-qa openSUSE Leap 16.0 6.12.0-160000.9.1
  • kernel-source openSUSE Leap 16.0 6.12.0-160000.9.1
  • kernel-default openSUSE Leap 16.0 6.12.0-160000.9.1

opensuse advisories openSUSE-SU-2026:20145-1

  • kernel-rt AlmaLinux 8 4.18.0-553.100.1.rt7.441.el8_10
  • kernel-rt-core AlmaLinux 8 4.18.0-553.100.1.rt7.441.el8_10
  • kernel-rt-modules AlmaLinux 8 4.18.0-553.100.1.rt7.441.el8_10
  • kernel-rt-debug-core AlmaLinux 8 4.18.0-553.100.1.rt7.441.el8_10
  • kernel-rt-debug-modules AlmaLinux 8 4.18.0-553.100.1.rt7.441.el8_10
  • kernel-rt-modules-extra AlmaLinux 8 4.18.0-553.100.1.rt7.441.el8_10
  • kernel-rt-debug-modules-extra AlmaLinux 8 4.18.0-553.100.1.rt7.441.el8_10
  • kernel AlmaLinux 8 4.18.0-553.100.1.el8_10

almalinux advisories ALSA-2026:1661ALSA-2026:1662ALSA-2026:1690ALSA-2026:1143

  • kernel-rt Rocky Linux 8 4.18.0-553.100.1.rt7.441.el8_10
  • kernel Rocky Linux 8 4.18.0-553.100.1.el8_10
  • kernel Rocky Linux 10 6.12.0-124.31.1.el10_1
  • kernel Rocky Linux 9 5.14.0-611.26.1.el9_7

rocky linux advisories RLSA-2026:1661RLSA-2026:1662RLSA-2026:1690RLSA-2026:1143

  • kernel Azure Linux 3.0 6.6.119.3-1

azure linux advisories AZL-71380

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-2025-40258 updated cvss 7.8

kernel: mptcp: fix race condition in mptcp_schedule_work()

  • 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 5.14.0-427.108.1.el9_4, kernel-debuginfo-common-s390x 5.14.0-427.108.1.el9_4, kernel-debuginfo-common-x86_64 5.14.0-427.108.1.el9_4, kernel-debuginfo-common-aarch64 5.14.0-427.108.1.el9_4, kernel-debuginfo-common-ppc64le 5.14.0-427.108.1.el9_4
    fixed: vendor fix RHSA-2026:1444
  • Red Hat CodeReady Linux Builder EUS (v.9.6) libperf 5.14.0-570.81.1.el9_6, kernel-debuginfo-common-s390x 5.14.0-570.81.1.el9_6, kernel-debuginfo-common-x86_64 5.14.0-570.81.1.el9_6, kernel-debuginfo-common-aarch64 5.14.0-570.81.1.el9_6, kernel-debuginfo-common-ppc64le 5.14.0-570.81.1.el9_6
    fixed: vendor fix RHSA-2026:1194
  • Red Hat Enterprise Linux AppStream (v. 9) rv 5.14.0-611.26.1.el9_7, perf 5.14.0-611.26.1.el9_7, rtla 5.14.0-611.26.1.el9_7, python3-perf 5.14.0-611.26.1.el9_7, kernel-devel-matched 5.14.0-611.26.1.el9_7, kernel-64k-devel-matched 5.14.0-611.26.1.el9_7, +7 more
    fixed: vendor fix RHSA-2026:1143
  • Red Hat Enterprise Linux AppStream (v. 10) rv 6.12.0-124.31.1.el10_1, perf 6.12.0-124.31.1.el10_1, rtla 6.12.0-124.31.1.el10_1, python3-perf 6.12.0-124.31.1.el10_1, kernel-devel-matched 6.12.0-124.31.1.el10_1, kernel-64k-devel-matched 6.12.0-124.31.1.el10_1, +7 more
    fixed: vendor fix RHSA-2026:1690
  • Red Hat Enterprise Linux AppStream E4S (v.9.0) perf 5.14.0-70.163.1.el9_0, kernel-devel-matched 5.14.0-70.163.1.el9_0, kernel-debug-devel-matched 5.14.0-70.163.1.el9_0, kernel-debuginfo-common-s390x 5.14.0-70.163.1.el9_0, kernel-zfcpdump-devel-matched 5.14.0-70.163.1.el9_0, kernel-debuginfo-common-x86_64 5.14.0-70.163.1.el9_0, +2 more
    fixed: vendor fix RHSA-2026:1494
  • Red Hat Enterprise Linux AppStream E4S (v.9.2) perf 5.14.0-284.156.1.el9_2, rtla 5.14.0-284.156.1.el9_2, kernel-devel-matched 5.14.0-284.156.1.el9_2, kernel-64k-devel-matched 5.14.0-284.156.1.el9_2, kernel-debug-devel-matched 5.14.0-284.156.1.el9_2, kernel-debuginfo-common-s390x 5.14.0-284.156.1.el9_2, +5 more
    fixed: vendor fix RHSA-2026:2560
  • Red Hat Enterprise Linux AppStream EUS (v. 10.0) rv 6.12.0-55.58.1.el10_0, perf 6.12.0-55.58.1.el10_0, rtla 6.12.0-55.58.1.el10_0, python3-perf 6.12.0-55.58.1.el10_0, kernel-devel-matched 6.12.0-55.58.1.el10_0, kernel-64k-devel-matched 6.12.0-55.58.1.el10_0, +7 more
    fixed: vendor fix RHSA-2026:1727
show 31 more
  • Red Hat Enterprise Linux AppStream EUS (v.9.4) rv 5.14.0-427.108.1.el9_4, perf 5.14.0-427.108.1.el9_4, rtla 5.14.0-427.108.1.el9_4, kernel-devel-matched 5.14.0-427.108.1.el9_4, kernel-64k-devel-matched 5.14.0-427.108.1.el9_4, kernel-debug-devel-matched 5.14.0-427.108.1.el9_4, +6 more
    fixed: vendor fix RHSA-2026:1444
  • Red Hat Enterprise Linux AppStream EUS (v.9.6) rv 5.14.0-570.81.1.el9_6, perf 5.14.0-570.81.1.el9_6, rtla 5.14.0-570.81.1.el9_6, python3-perf 5.14.0-570.81.1.el9_6, kernel-devel-matched 5.14.0-570.81.1.el9_6, kernel-64k-devel-matched 5.14.0-570.81.1.el9_6, +7 more
    fixed: vendor fix RHSA-2026:1194
  • Red Hat Enterprise Linux BaseOS (v. 8) perf 4.18.0-553.100.1.el8_10, kernel 4.18.0-553.100.1.el8_10, bpftool 4.18.0-553.100.1.el8_10, kernel-core 4.18.0-553.100.1.el8_10, kernel-tools 4.18.0-553.100.1.el8_10, python3-perf 4.18.0-553.100.1.el8_10, +15 more
    fixed: vendor fix RHSA-2026:1662
  • Red Hat Enterprise Linux BaseOS (v. 9) kernel 5.14.0-611.26.1.el9_7, kernel-64k 5.14.0-611.26.1.el9_7, kernel-core 5.14.0-611.26.1.el9_7, kernel-tools 5.14.0-611.26.1.el9_7, kernel-modules 5.14.0-611.26.1.el9_7, kernel-64k-core 5.14.0-611.26.1.el9_7, +27 more
    fixed: vendor fix RHSA-2026:1143
  • Red Hat Enterprise Linux BaseOS (v. 10) kernel 6.12.0-124.31.1.el10_1, kernel-64k 6.12.0-124.31.1.el10_1, kernel-core 6.12.0-124.31.1.el10_1, kernel-tools 6.12.0-124.31.1.el10_1, kernel-modules 6.12.0-124.31.1.el10_1, kernel-64k-core 6.12.0-124.31.1.el10_1, +28 more
    fixed: vendor fix RHSA-2026:1690
  • Red Hat Enterprise Linux BaseOS AUS (v.8.6) perf 4.18.0-372.179.1.el8_6, kernel 4.18.0-372.179.1.el8_6, bpftool 4.18.0-372.179.1.el8_6, kernel-core 4.18.0-372.179.1.el8_6, kernel-tools 4.18.0-372.179.1.el8_6, python3-perf 4.18.0-372.179.1.el8_6, +8 more Red Hat Enterprise Linux BaseOS E4S (v.8.6) perf 4.18.0-372.179.1.el8_6, kernel 4.18.0-372.179.1.el8_6, bpftool 4.18.0-372.179.1.el8_6, kernel-core 4.18.0-372.179.1.el8_6, kernel-tools 4.18.0-372.179.1.el8_6, python3-perf 4.18.0-372.179.1.el8_6, +15 more
    fixed: vendor fix RHSA-2026:2490
  • Red Hat Enterprise Linux BaseOS E4S (v.8.8) perf 4.18.0-477.128.1.el8_8, kernel 4.18.0-477.128.1.el8_8, bpftool 4.18.0-477.128.1.el8_8, kernel-core 4.18.0-477.128.1.el8_8, kernel-tools 4.18.0-477.128.1.el8_8, python3-perf 4.18.0-477.128.1.el8_8, +9 more
    fixed: vendor fix RHSA-2026:2535
  • Red Hat Enterprise Linux BaseOS E4S (v.9.0) kernel 5.14.0-70.163.1.el9_0, bpftool 5.14.0-70.163.1.el9_0, kernel-core 5.14.0-70.163.1.el9_0, kernel-tools 5.14.0-70.163.1.el9_0, python3-perf 5.14.0-70.163.1.el9_0, kernel-modules 5.14.0-70.163.1.el9_0, +14 more
    fixed: vendor fix RHSA-2026:1494
  • Red Hat Enterprise Linux BaseOS E4S (v.9.2) bpftool 7.0.0-284.156.1.el9_2, kernel 5.14.0-284.156.1.el9_2, kernel-64k 5.14.0-284.156.1.el9_2, kernel-core 5.14.0-284.156.1.el9_2, kernel-tools 5.14.0-284.156.1.el9_2, python3-perf 5.14.0-284.156.1.el9_2, +28 more
    fixed: vendor fix RHSA-2026:2560
  • Red Hat Enterprise Linux BaseOS EUS (v. 10.0) kernel 6.12.0-55.58.1.el10_0, kernel-64k 6.12.0-55.58.1.el10_0, kernel-core 6.12.0-55.58.1.el10_0, kernel-tools 6.12.0-55.58.1.el10_0, kernel-modules 6.12.0-55.58.1.el10_0, kernel-64k-core 6.12.0-55.58.1.el10_0, +27 more
    fixed: vendor fix RHSA-2026:1727
  • Red Hat Enterprise Linux BaseOS EUS (v.9.4) bpftool 7.3.0-427.108.1.el9_4, kernel 5.14.0-427.108.1.el9_4, kernel-64k 5.14.0-427.108.1.el9_4, kernel-core 5.14.0-427.108.1.el9_4, kernel-tools 5.14.0-427.108.1.el9_4, python3-perf 5.14.0-427.108.1.el9_4, +28 more
    fixed: vendor fix RHSA-2026:1444
  • Red Hat Enterprise Linux BaseOS EUS (v.9.6) kernel 5.14.0-570.81.1.el9_6, kernel-64k 5.14.0-570.81.1.el9_6, kernel-core 5.14.0-570.81.1.el9_6, kernel-tools 5.14.0-570.81.1.el9_6, kernel-modules 5.14.0-570.81.1.el9_6, kernel-64k-core 5.14.0-570.81.1.el9_6, +27 more
    fixed: vendor fix RHSA-2026:1194
  • Red Hat Enterprise Linux BaseOS TUS (v.8.6) perf 4.18.0-372.179.1.el8_6, kernel 4.18.0-372.179.1.el8_6, bpftool 4.18.0-372.179.1.el8_6, kernel-core 4.18.0-372.179.1.el8_6, kernel-tools 4.18.0-372.179.1.el8_6, python3-perf 4.18.0-372.179.1.el8_6, +8 more
    fixed: vendor fix RHSA-2026:2490
  • Red Hat Enterprise Linux BaseOS TUS (v.8.8) perf 4.18.0-477.128.1.el8_8, kernel 4.18.0-477.128.1.el8_8, bpftool 4.18.0-477.128.1.el8_8, kernel-core 4.18.0-477.128.1.el8_8, kernel-tools 4.18.0-477.128.1.el8_8, python3-perf 4.18.0-477.128.1.el8_8, +8 more
    fixed: vendor fix RHSA-2026:2535
  • Red Hat Enterprise Linux CodeReady Linux Builder (v. 9) libperf 5.14.0-611.26.1.el9_7, kernel-debuginfo-common-s390x 5.14.0-611.26.1.el9_7, kernel-debuginfo-common-x86_64 5.14.0-611.26.1.el9_7, kernel-debuginfo-common-aarch64 5.14.0-611.26.1.el9_7, kernel-debuginfo-common-ppc64le 5.14.0-611.26.1.el9_7
    fixed: vendor fix RHSA-2026:1143
  • Red Hat Enterprise Linux CodeReady Linux Builder (v. 10) libperf 6.12.0-124.31.1.el10_1, kernel-debuginfo-common-s390x 6.12.0-124.31.1.el10_1, kernel-debuginfo-common-x86_64 6.12.0-124.31.1.el10_1, kernel-debuginfo-common-aarch64 6.12.0-124.31.1.el10_1, kernel-debuginfo-common-ppc64le 6.12.0-124.31.1.el10_1
    fixed: vendor fix RHSA-2026:1690
  • Red Hat Enterprise Linux CodeReady Linux Builder EUS (v. 10.0) libperf 6.12.0-55.58.1.el10_0, kernel-debuginfo-common-s390x 6.12.0-55.58.1.el10_0, kernel-debuginfo-common-x86_64 6.12.0-55.58.1.el10_0, kernel-debuginfo-common-aarch64 6.12.0-55.58.1.el10_0, kernel-debuginfo-common-ppc64le 6.12.0-55.58.1.el10_0
    fixed: vendor fix RHSA-2026:1727
  • Red Hat Enterprise Linux CRB (v. 8) kernel-debuginfo-common-x86_64 4.18.0-553.100.1.el8_10, kernel-debuginfo-common-aarch64 4.18.0-553.100.1.el8_10, kernel-debuginfo-common-ppc64le 4.18.0-553.100.1.el8_10
    fixed: vendor fix RHSA-2026:1662
  • Red Hat Enterprise Linux NFV (v. 8) kernel-rt 4.18.0-553.100.1.rt7.441.el8_10, kernel-rt-kvm 4.18.0-553.100.1.rt7.441.el8_10, kernel-rt-core 4.18.0-553.100.1.rt7.441.el8_10, kernel-rt-modules 4.18.0-553.100.1.rt7.441.el8_10, kernel-rt-debug-kvm 4.18.0-553.100.1.rt7.441.el8_10, kernel-rt-debug-core 4.18.0-553.100.1.rt7.441.el8_10, +3 more
    fixed: vendor fix RHSA-2026:1661
  • Red Hat Enterprise Linux NFV E4S (v.9.0) kernel-rt 5.14.0-70.163.1.rt21.235.el9_0, kernel-rt-kvm 5.14.0-70.163.1.rt21.235.el9_0, kernel-rt-core 5.14.0-70.163.1.rt21.235.el9_0, kernel-rt-modules 5.14.0-70.163.1.rt21.235.el9_0, kernel-rt-debug-kvm 5.14.0-70.163.1.rt21.235.el9_0, kernel-rt-debug-core 5.14.0-70.163.1.rt21.235.el9_0, +4 more
    fixed: vendor fix RHSA-2026:1495
  • Red Hat Enterprise Linux Real Time (v. 9) kernel-rt 5.14.0-611.26.1.el9_7, kernel-rt-64k 5.14.0-611.26.1.el9_7, kernel-rt-core 5.14.0-611.26.1.el9_7, kernel-rt-modules 5.14.0-611.26.1.el9_7, kernel-rt-64k-core 5.14.0-611.26.1.el9_7, kernel-rt-debug-core 5.14.0-611.26.1.el9_7, +14 more
    fixed: vendor fix RHSA-2026:1143
  • Red Hat Enterprise Linux Real Time (v. 10) kernel-rt 6.12.0-124.31.1.el10_1, kernel-rt-64k 6.12.0-124.31.1.el10_1, kernel-rt-core 6.12.0-124.31.1.el10_1, kernel-rt-modules 6.12.0-124.31.1.el10_1, kernel-rt-64k-core 6.12.0-124.31.1.el10_1, kernel-rt-debug-core 6.12.0-124.31.1.el10_1, +14 more
    fixed: vendor fix RHSA-2026:1690
  • Red Hat Enterprise Linux Real Time E4S (v.9.0) kernel-rt 5.14.0-70.163.1.rt21.235.el9_0, kernel-rt-core 5.14.0-70.163.1.rt21.235.el9_0, kernel-rt-modules 5.14.0-70.163.1.rt21.235.el9_0, kernel-rt-debug-core 5.14.0-70.163.1.rt21.235.el9_0, kernel-rt-debug-modules 5.14.0-70.163.1.rt21.235.el9_0, kernel-rt-modules-extra 5.14.0-70.163.1.rt21.235.el9_0, +2 more
    fixed: vendor fix RHSA-2026:1495
  • Red Hat Enterprise Linux Real Time E4S (v.9.2) kernel-rt 5.14.0-284.156.1.rt14.441.el9_2, kernel-rt-core 5.14.0-284.156.1.rt14.441.el9_2, kernel-rt-modules 5.14.0-284.156.1.rt14.441.el9_2, kernel-rt-debug-core 5.14.0-284.156.1.rt14.441.el9_2, kernel-rt-modules-core 5.14.0-284.156.1.rt14.441.el9_2, kernel-rt-debug-modules 5.14.0-284.156.1.rt14.441.el9_2, +4 more
    fixed: vendor fix RHSA-2026:2583
  • Red Hat Enterprise Linux Real Time EUS (v. 10.0) kernel-rt 6.12.0-55.58.1.el10_0, kernel-rt-64k 6.12.0-55.58.1.el10_0, kernel-rt-core 6.12.0-55.58.1.el10_0, kernel-rt-modules 6.12.0-55.58.1.el10_0, kernel-rt-64k-core 6.12.0-55.58.1.el10_0, kernel-rt-debug-core 6.12.0-55.58.1.el10_0, +14 more
    fixed: vendor fix RHSA-2026:1727
  • Red Hat Enterprise Linux Real Time EUS (v.9.4) kernel-rt 5.14.0-427.108.1.el9_4, kernel-rt-core 5.14.0-427.108.1.el9_4, kernel-rt-modules 5.14.0-427.108.1.el9_4, kernel-rt-debug-core 5.14.0-427.108.1.el9_4, kernel-rt-modules-core 5.14.0-427.108.1.el9_4, kernel-rt-debug-modules 5.14.0-427.108.1.el9_4, +4 more
    fixed: vendor fix RHSA-2026:1444
  • Red Hat Enterprise Linux Real Time EUS (v.9.6) kernel-rt 5.14.0-570.81.1.el9_6, kernel-rt-64k 5.14.0-570.81.1.el9_6, kernel-rt-core 5.14.0-570.81.1.el9_6, kernel-rt-modules 5.14.0-570.81.1.el9_6, kernel-rt-64k-core 5.14.0-570.81.1.el9_6, kernel-rt-debug-core 5.14.0-570.81.1.el9_6, +14 more
    fixed: vendor fix RHSA-2026:1194
  • Red Hat Enterprise Linux Real Time for NFV (v. 9) kernel-rt 5.14.0-611.26.1.el9_7, kernel-rt-core 5.14.0-611.26.1.el9_7, kernel-rt-modules 5.14.0-611.26.1.el9_7, kernel-rt-debug-core 5.14.0-611.26.1.el9_7, kernel-rt-modules-core 5.14.0-611.26.1.el9_7, kernel-rt-debug-modules 5.14.0-611.26.1.el9_7, +4 more
    fixed: vendor fix RHSA-2026:1143
  • Red Hat Enterprise Linux Real Time for NFV (v. 10) kernel-rt 6.12.0-124.31.1.el10_1, kernel-rt-core 6.12.0-124.31.1.el10_1, kernel-rt-modules 6.12.0-124.31.1.el10_1, kernel-rt-debug-core 6.12.0-124.31.1.el10_1, kernel-rt-modules-core 6.12.0-124.31.1.el10_1, kernel-rt-debug-modules 6.12.0-124.31.1.el10_1, +4 more
    fixed: vendor fix RHSA-2026:1690
  • Red Hat Enterprise Linux Real Time for NFV E4S (v.9.2) kernel-rt 5.14.0-284.156.1.rt14.441.el9_2, kernel-rt-kvm 5.14.0-284.156.1.rt14.441.el9_2, kernel-rt-core 5.14.0-284.156.1.rt14.441.el9_2, kernel-rt-modules 5.14.0-284.156.1.rt14.441.el9_2, kernel-rt-debug-kvm 5.14.0-284.156.1.rt14.441.el9_2, kernel-rt-debug-core 5.14.0-284.156.1.rt14.441.el9_2, +6 more
    fixed: vendor fix RHSA-2026:2583
  • Red Hat Enterprise Linux Real Time for NFV EUS (v. 10.0) kernel-rt 6.12.0-55.58.1.el10_0, kernel-rt-kvm 6.12.0-55.58.1.el10_0, kernel-rt-core 6.12.0-55.58.1.el10_0, kernel-rt-modules 6.12.0-55.58.1.el10_0, kernel-rt-debug-kvm 6.12.0-55.58.1.el10_0, kernel-rt-debug-core 6.12.0-55.58.1.el10_0, +6 more
    fixed: vendor fix RHSA-2026:1727

3 more fixed, 4 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
partial
Assessed
4 mo ago

Exploit prediction

0.50% chance of exploitation in the next 30 days, higher than 42% 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

Affected products

  • Linux Linux
  • Siemens RUGGEDCOM RST2428P

Classification

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.