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Fencer Vulns
high 7.8

CVE-2026-46116 json

xfrm: defensively unhash xfrm_state lists in __xfrm_state_delete

published 2026-05-28 5 mo ago modified 2026-10-19 20 d ago also EUVD-2026-32875

cvss
7.8
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
0.1%
EPSS 0.1% chance of exploitation in 30 days, percentile 2%
public exploits
0
none known

Summary

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

xfrm: defensively unhash xfrm_state lists in __xfrm_state_delete

KASAN reproduces a slab-use-after-free in __xfrm_state_delete()'s hlist_del_rcu calls under syzkaller load on linux-6.12.y stable (reproduced on 6.12.47, also reachable via the same code path on torvalds/master and on the ipsec tree). Nine unique signatures cluster in the xfrm_state lifecycle, the load-bearing one being:

BUG: KASAN: slab-use-after-free in __hlist_del include/linux/list.h:990 [inline] BUG: KASAN: slab-use-after-free in hlist_del_rcu include/linux/rculist.h:516 [inline] BUG: KASAN: slab-use-after-free in __xfrm_state_delete net/xfrm/xfrm_state.c Write of size 8 at addr ffff8881198bcb70 by task kworker/u8:9/435

Workqueue: netns cleanup_net Call Trace: __hlist_del / hlist_del_rcu __xfrm_state_delete xfrm_state_delete xfrm_state_flush xfrm_state_fini ops_exit_list cleanup_net

The other observed signatures hit the same slab object from __xfrm_state_lookup, xfrm_alloc_spi, __xfrm_state_insert and an OOB write variant of __xfrm_state_delete, all on the byseq/byspi hash chains.

__xfrm_state_delete() guards its byseq and byspi unhashes with value-based predicates:

if (x->km.seq) hlist_del_rcu(&x->byseq); if (x->id.spi) hlist_del_rcu(&x->byspi);

while everywhere else in the file (e.g. state_cache, state_cache_input) the safer hlist_unhashed() check is used. xfrm_alloc_spi() sets x->id.spi = newspi inside xfrm_state_lock and then immediately inserts into byspi, but a path that observes x->id.spi != 0 outside of xfrm_state_lock can still skip-or-hit the byspi unhash inconsistently with whether x is actually on the list. The same holds for x->km.seq versus byseq, and the bydst/bysrc unhashes have no predicate at all, so a second __xfrm_state_delete() on the same object writes through LIST_POISON pprev.

The defensive change here:

- Use hlist_del_init_rcu() instead of hlist_del_rcu() on bydst, bysrc, byseq and byspi so a second deletion is a no-op rather than a write through LIST_POISON pprev. The byseq/byspi nodes are already initialised in xfrm_state_alloc(). - Test hlist_unhashed() rather than the value predicate for byseq/byspi, so the unhash decision tracks list state rather than mutable scalar fields.

Empirical verification: applied this patch on top of v6.12.47, rebuilt, and re-ran the same syzkaller harness for 1h16m on a previously-crashy configuration that produced ~100 hits each of slab-use-after-free Read in xfrm_alloc_spi / Read in __xfrm_state_lookup / Write in __xfrm_state_delete. After the patch, 7.1M execs across 32 VMs at ~1550 exec/sec produced zero xfrm_state UAF/OOB hits. /proc/slabinfo confirms the xfrm_state slab is actively allocated and freed during the run (~143 KiB resident), so the fuzzer is still exercising those code paths -- they just no longer crash.

Reproduction:

- Linux 6.12.47 x86_64 + KASAN_GENERIC + KASAN_INLINE + KCOV - syzkaller @ 746545b8b1e4c3a128db8652b340d3df90ce61db - 32 QEMU/KVM VMs x 2 vCPU on AWS c5.metal bare metal - 9 unique signatures collected in ~9h, all within xfrm_state lifecycle

Patch / fix

  • Linux Linux 5.10.261, 5.15.210, 6.1.176, 6.6.140, 6.12.88, 6.18.30, 7.0.7, 7.1
  • Red Hat Red Hat Enterprise Linux 10 0:6.12.0-211.37.1.el10_2
  • Red Hat Red Hat Enterprise Linux 10.0 Extended Update Support 0:6.12.0-55.88.1.el10_0
  • Red Hat Red Hat Enterprise Linux 7 Extended Lifecycle Support 0:3.10.0-1160.156.1.el7, 0:3.10.0-1160.156.1.rt56.1308.el7
  • Red Hat Red Hat Enterprise Linux 8 0:4.18.0-553.144.1.el8_10, 0:4.18.0-553.144.1.rt7.485.el8_10
  • Red Hat Red Hat Enterprise Linux 8.4 Advanced Mission Critical Update Support 0:4.18.0-305.199.1.el8_4
  • Red Hat Red Hat Enterprise Linux 8.4 Extended Update Support Long-Life Add-On 0:4.18.0-305.199.1.el8_4
  • Red Hat Red Hat Enterprise Linux 8.6 Advanced Mission Critical Update Support 0:4.18.0-372.204.1.el8_6
  • Red Hat Red Hat Enterprise Linux 8.6 Extended Update Support Long-Life Add-On 0:4.18.0-372.204.1.el8_6
  • Red Hat Red Hat Enterprise Linux 8.8 Telecommunications Update Service 0:4.18.0-477.156.1.el8_8
  • Red Hat Red Hat Enterprise Linux 8.8 Update Services for SAP Solutions 0:4.18.0-477.156.1.el8_8
  • Red Hat Red Hat Enterprise Linux 9 0:5.14.0-687.22.1.el9_8
  • Red Hat Red Hat Enterprise Linux 9.2 Update Services for SAP Solutions 0:5.14.0-284.183.1.el9_2, 0:5.14.0-284.183.1.rt14.468.el9_2
  • Red Hat Red Hat Enterprise Linux 9.4 Update Services for SAP Solutions 0:5.14.0-427.139.1.el9_4
  • Red Hat Red Hat Enterprise Linux 9.6 Extended Update Support 0:5.14.0-570.129.1.el9_6
  • linux Debian 12 6.1.176-1
  • linux Debian 13 6.12.88-1
  • linux Debian 14 7.0.7-1

debian advisories DEBIAN-CVE-2026-46116

  • linux Ubuntu 22.04 LTS 5.15.0-198.208
  • linux Ubuntu 24.04 LTS 6.8.0-136.136
  • linux Ubuntu 26.04 LTS 7.0.0-28.28
  • linux-aws Ubuntu 22.04 LTS 5.15.0-1117.124
  • linux-aws Ubuntu 24.04 LTS 6.8.0-1061.64
  • linux-aws Ubuntu 26.04 LTS 7.0.0-1009.9
  • linux-gcp Ubuntu 22.04 LTS 5.15.0-1118.128
  • linux-gcp Ubuntu 24.04 LTS 6.8.0-1064.72

ubuntu advisories UBUNTU-CVE-2026-46116

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-5_14_0-687_10_1 RHEL 9 1-7.el9_8
  • kpatch-patch-4_18_0-553_85_1 RHEL 8 1-12.el8_10
  • kpatch-patch-4_18_0-553_53_1 RHEL 8 1-17.el8_10
  • kpatch-patch-4_18_0-553_72_1 RHEL 8 1-14.el8_10
  • kpatch-patch-4_18_0-553_109_1 RHEL 8 1-10.el8_10
  • kpatch-patch-4_18_0-553_125_1 RHEL 8 1-7.el8_10
  • kpatch-patch-6_12_0-211_16_1 RHEL 10.2 1-7.el10_2
  • kernel RHEL 10.2 6.12.0-211.37.1.el10_2

red hat advisories RHSA-2026:59148RHSA-2026:59149RHSA-2026:59147RHSA-2026:59145RHSA-2026:59146RHSA-2026:59143

  • kernel-livepatch-SLE16_Update_5 SLES 16.0, Linux Micro 6.2, SLES for SAP applications 16.0 12-160000.1.1
  • kernel-livepatch-SLE16_Update_9 SLES 16.0, Linux Micro 6.2, SLES for SAP applications 16.0 8-160000.1.1
  • kernel-livepatch-SLE16_Update_0 SLES 16.0, Linux Micro 6.2, SLES for SAP applications 16.0 19-160000.4.3
  • kernel-livepatch-MICRO-6-0-RT_Update_18 Linux Micro 6.1, Linux Micro 6.0 11-1.1
  • kernel-livepatch-MICRO-6-0-RT_Update_15 Linux Micro 6.1, Linux Micro 6.0 12-1.1
  • kernel-livepatch-MICRO-6-0-RT_Update_14 Linux Micro 6.1, Linux Micro 6.0 13-1.1
  • kernel-livepatch-MICRO-6-0-RT_Update_13 Linux Micro 6.1, Linux Micro 6.0 13-1.1
  • kernel-livepatch-MICRO-6-0-RT_Update_12 Linux Micro 6.1, Linux Micro 6.0 17-1.1

suse advisories SUSE-SU-2026:4559-1SUSE-SU-2026:4551-1SUSE-SU-2026:4550-1SUSE-SU-2026:4548-1SUSE-SU-2026:24107-1SUSE-SU-2026:24108-1

  • 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-2026:21388-1openSUSE-SU-2026:10954-1

  • kernel AlmaLinux 10 6.12.0-211.37.1.el10_2
  • rv AlmaLinux 10 6.12.0-211.37.1.el10_2
  • perf AlmaLinux 10 6.12.0-211.37.1.el10_2
  • rtla AlmaLinux 10 6.12.0-211.37.1.el10_2
  • libperf AlmaLinux 10 6.12.0-211.37.1.el10_2
  • kernel-rt AlmaLinux 10 6.12.0-211.37.1.el10_2
  • kernel-64k AlmaLinux 10 6.12.0-211.37.1.el10_2
  • kernel-core AlmaLinux 10 6.12.0-211.37.1.el10_2

almalinux advisories ALSA-2026:42919ALSA-2026:39179ALSA-2026:39180ALSA-2026:36018

  • kernel Rocky Linux 10 6.12.0-211.37.1.el10_2
  • kernel-rt Rocky Linux 8 4.18.0-553.144.1.rt7.485.el8_10
  • kernel Rocky Linux 8 4.18.0-553.144.1.el8_10
  • kernel Rocky Linux 9 5.14.0-687.22.1.el9_8

rocky linux advisories RLSA-2026:42919RLSA-2026:39180RLSA-2026:39179RLSA-2026:36018

  • kernel Azure Linux 3.0 6.6.141.1-1

azure linux advisories AZL-89070

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-2026-46116 updated cvss 7.0

kernel: xfrm: defensively unhash xfrm_state lists in __xfrm_state_delete

  • 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 5.14.0-570.129.1.el9_6, kernel-debuginfo-common-s390x 5.14.0-570.129.1.el9_6, kernel-debuginfo-common-x86_64 5.14.0-570.129.1.el9_6, kernel-debuginfo-common-aarch64 5.14.0-570.129.1.el9_6, kernel-debuginfo-common-ppc64le 5.14.0-570.129.1.el9_6
    fixed: vendor fix RHSA-2026:44385
  • Red Hat Enterprise Linux AppStream (v. 9) rv 5.14.0-687.22.1.el9_8, perf 5.14.0-687.22.1.el9_8, rtla 5.14.0-687.22.1.el9_8, python3-perf 5.14.0-687.22.1.el9_8, kernel-devel-matched 5.14.0-687.22.1.el9_8, kernel-64k-devel-matched 5.14.0-687.22.1.el9_8, +7 more
    fixed: vendor fix RHSA-2026:36018
  • Red Hat Enterprise Linux AppStream (v. 10) rv 6.12.0-211.37.1.el10_2, perf 6.12.0-211.37.1.el10_2, rtla 6.12.0-211.37.1.el10_2, python3-perf 6.12.0-211.37.1.el10_2, kernel-devel-matched 6.12.0-211.37.1.el10_2, kernel-64k-devel-matched 6.12.0-211.37.1.el10_2, +7 more
    fixed: vendor fix RHSA-2026:42919
  • Red Hat Enterprise Linux AppStream E4S (v.9.2) perf 5.14.0-284.183.1.el9_2, rtla 5.14.0-284.183.1.el9_2, kernel-devel-matched 5.14.0-284.183.1.el9_2, kernel-64k-devel-matched 5.14.0-284.183.1.el9_2, kernel-debug-devel-matched 5.14.0-284.183.1.el9_2, kernel-debuginfo-common-s390x 5.14.0-284.183.1.el9_2, +5 more
    fixed: vendor fix RHSA-2026:47739
  • Red Hat Enterprise Linux AppStream E4S (v.9.4) rv 5.14.0-427.139.1.el9_4, perf 5.14.0-427.139.1.el9_4, rtla 5.14.0-427.139.1.el9_4, kernel-devel-matched 5.14.0-427.139.1.el9_4, kernel-64k-devel-matched 5.14.0-427.139.1.el9_4, kernel-debug-devel-matched 5.14.0-427.139.1.el9_4, +6 more
    fixed: vendor fix RHSA-2026:43231
  • Red Hat Enterprise Linux AppStream EUS (v. 10.0) rv 6.12.0-55.88.1.el10_0, perf 6.12.0-55.88.1.el10_0, rtla 6.12.0-55.88.1.el10_0, python3-perf 6.12.0-55.88.1.el10_0, kernel-devel-matched 6.12.0-55.88.1.el10_0, kernel-64k-devel-matched 6.12.0-55.88.1.el10_0, +7 more
    fixed: vendor fix RHSA-2026:39371
  • Red Hat Enterprise Linux AppStream EUS (v.9.6) rv 5.14.0-570.129.1.el9_6, perf 5.14.0-570.129.1.el9_6, rtla 5.14.0-570.129.1.el9_6, python3-perf 5.14.0-570.129.1.el9_6, kernel-devel-matched 5.14.0-570.129.1.el9_6, kernel-64k-devel-matched 5.14.0-570.129.1.el9_6, +7 more
    fixed: vendor fix RHSA-2026:44385
show 32 more
  • Red Hat Enterprise Linux BaseOS (v. 8) perf 4.18.0-553.144.1.el8_10, kernel 4.18.0-553.144.1.el8_10, bpftool 4.18.0-553.144.1.el8_10, kernel-core 4.18.0-553.144.1.el8_10, kernel-tools 4.18.0-553.144.1.el8_10, python3-perf 4.18.0-553.144.1.el8_10, +20 more
    fixed: vendor fix RHSA-2026:39179
  • Red Hat Enterprise Linux BaseOS (v. 9) kernel 5.14.0-687.22.1.el9_8, kernel-64k 5.14.0-687.22.1.el9_8, kernel-core 5.14.0-687.22.1.el9_8, kernel-tools 5.14.0-687.22.1.el9_8, kernel-modules 5.14.0-687.22.1.el9_8, kernel-64k-core 5.14.0-687.22.1.el9_8, +28 more
    fixed: vendor fix RHSA-2026:36018
  • Red Hat Enterprise Linux BaseOS (v. 10) kernel 6.12.0-211.37.1.el10_2, kernel-64k 6.12.0-211.37.1.el10_2, kernel-core 6.12.0-211.37.1.el10_2, kernel-tools 6.12.0-211.37.1.el10_2, kernel-modules 6.12.0-211.37.1.el10_2, kernel-64k-core 6.12.0-211.37.1.el10_2, +29 more
    fixed: vendor fix RHSA-2026:42919
  • Red Hat Enterprise Linux BaseOS AUS (v.8.4) perf 4.18.0-305.199.1.el8_4, kernel 4.18.0-305.199.1.el8_4, bpftool 4.18.0-305.199.1.el8_4, kernel-core 4.18.0-305.199.1.el8_4, kernel-tools 4.18.0-305.199.1.el8_4, python3-perf 4.18.0-305.199.1.el8_4, +8 more
    fixed: vendor fix RHSA-2026:47633
  • Red Hat Enterprise Linux BaseOS AUS (v.8.6) perf 4.18.0-372.204.1.el8_6, kernel 4.18.0-372.204.1.el8_6, bpftool 4.18.0-372.204.1.el8_6, kernel-core 4.18.0-372.204.1.el8_6, kernel-tools 4.18.0-372.204.1.el8_6, python3-perf 4.18.0-372.204.1.el8_6, +8 more
    fixed: vendor fix RHSA-2026:49033
  • Red Hat Enterprise Linux BaseOS E4S (v.8.8) perf 4.18.0-477.156.1.el8_8, kernel 4.18.0-477.156.1.el8_8, bpftool 4.18.0-477.156.1.el8_8, kernel-core 4.18.0-477.156.1.el8_8, kernel-tools 4.18.0-477.156.1.el8_8, python3-perf 4.18.0-477.156.1.el8_8, +14 more
    fixed: vendor fix RHSA-2026:47869
  • Red Hat Enterprise Linux BaseOS E4S (v.9.2) bpftool 7.0.0-284.183.1.el9_2, kernel 5.14.0-284.183.1.el9_2, kernel-64k 5.14.0-284.183.1.el9_2, kernel-core 5.14.0-284.183.1.el9_2, kernel-tools 5.14.0-284.183.1.el9_2, python3-perf 5.14.0-284.183.1.el9_2, +33 more
    fixed: vendor fix RHSA-2026:47739
  • Red Hat Enterprise Linux BaseOS E4S (v.9.4) bpftool 7.3.0-427.139.1.el9_4, kernel 5.14.0-427.139.1.el9_4, kernel-64k 5.14.0-427.139.1.el9_4, kernel-core 5.14.0-427.139.1.el9_4, kernel-tools 5.14.0-427.139.1.el9_4, python3-perf 5.14.0-427.139.1.el9_4, +33 more
    fixed: vendor fix RHSA-2026:43231
  • Red Hat Enterprise Linux BaseOS EUS (v. 10.0) kernel 6.12.0-55.88.1.el10_0, kernel-64k 6.12.0-55.88.1.el10_0, kernel-core 6.12.0-55.88.1.el10_0, kernel-tools 6.12.0-55.88.1.el10_0, kernel-modules 6.12.0-55.88.1.el10_0, kernel-64k-core 6.12.0-55.88.1.el10_0, +27 more
    fixed: vendor fix RHSA-2026:39371
  • Red Hat Enterprise Linux BaseOS EUS (v.9.6) kernel 5.14.0-570.129.1.el9_6, kernel-64k 5.14.0-570.129.1.el9_6, kernel-core 5.14.0-570.129.1.el9_6, kernel-tools 5.14.0-570.129.1.el9_6, kernel-modules 5.14.0-570.129.1.el9_6, kernel-64k-core 5.14.0-570.129.1.el9_6, +32 more
    fixed: vendor fix RHSA-2026:44385
  • Red Hat Enterprise Linux BaseOS EUS EXTENSION (v.8.4) perf 4.18.0-305.199.1.el8_4, kernel 4.18.0-305.199.1.el8_4, bpftool 4.18.0-305.199.1.el8_4, kernel-core 4.18.0-305.199.1.el8_4, kernel-tools 4.18.0-305.199.1.el8_4, python3-perf 4.18.0-305.199.1.el8_4, +8 more
    fixed: vendor fix RHSA-2026:47633
  • Red Hat Enterprise Linux BaseOS EUS EXTENSION (v.8.6) perf 4.18.0-372.204.1.el8_6, kernel 4.18.0-372.204.1.el8_6, bpftool 4.18.0-372.204.1.el8_6, kernel-core 4.18.0-372.204.1.el8_6, kernel-tools 4.18.0-372.204.1.el8_6, python3-perf 4.18.0-372.204.1.el8_6, +8 more
    fixed: vendor fix RHSA-2026:49033
  • Red Hat Enterprise Linux BaseOS TUS (v.8.8) perf 4.18.0-477.156.1.el8_8, kernel 4.18.0-477.156.1.el8_8, bpftool 4.18.0-477.156.1.el8_8, kernel-core 4.18.0-477.156.1.el8_8, kernel-tools 4.18.0-477.156.1.el8_8, python3-perf 4.18.0-477.156.1.el8_8, +8 more
    fixed: vendor fix RHSA-2026:47869
  • Red Hat Enterprise Linux CodeReady Linux Builder (v. 9) libperf 5.14.0-687.22.1.el9_8, kernel-debuginfo-common-s390x 5.14.0-687.22.1.el9_8, kernel-debuginfo-common-x86_64 5.14.0-687.22.1.el9_8, kernel-debuginfo-common-aarch64 5.14.0-687.22.1.el9_8, kernel-debuginfo-common-ppc64le 5.14.0-687.22.1.el9_8
    fixed: vendor fix RHSA-2026:36018
  • Red Hat Enterprise Linux CodeReady Linux Builder (v. 10) libperf 6.12.0-211.37.1.el10_2, kernel-debuginfo-common-s390x 6.12.0-211.37.1.el10_2, kernel-debuginfo-common-x86_64 6.12.0-211.37.1.el10_2, kernel-debuginfo-common-aarch64 6.12.0-211.37.1.el10_2, kernel-debuginfo-common-ppc64le 6.12.0-211.37.1.el10_2
    fixed: vendor fix RHSA-2026:42919
  • Red Hat Enterprise Linux CodeReady Linux Builder EUS (v. 10.0) libperf 6.12.0-55.88.1.el10_0, kernel-debuginfo-common-s390x 6.12.0-55.88.1.el10_0, kernel-debuginfo-common-x86_64 6.12.0-55.88.1.el10_0, kernel-debuginfo-common-aarch64 6.12.0-55.88.1.el10_0, kernel-debuginfo-common-ppc64le 6.12.0-55.88.1.el10_0
    fixed: vendor fix RHSA-2026:39371
  • Red Hat Enterprise Linux CRB (v. 8) kernel-debuginfo-common-x86_64 4.18.0-553.144.1.el8_10, kernel-debuginfo-common-aarch64 4.18.0-553.144.1.el8_10, kernel-debuginfo-common-ppc64le 4.18.0-553.144.1.el8_10
    fixed: vendor fix RHSA-2026:39179
  • Red Hat Enterprise Linux for Real Time (v. 7 ELS) kernel-rt 3.10.0-1160.156.1.rt56.1308.el7, kernel-rt-trace 3.10.0-1160.156.1.rt56.1308.el7, kernel-rt-debuginfo-common-x86_64 3.10.0-1160.156.1.rt56.1308.el7
    fixed: vendor fix RHSA-2026:41234
  • Red Hat Enterprise Linux NFV (v. 8) kernel-rt 4.18.0-553.144.1.rt7.485.el8_10, kernel-rt-kvm 4.18.0-553.144.1.rt7.485.el8_10, kernel-rt-core 4.18.0-553.144.1.rt7.485.el8_10, kernel-rt-modules 4.18.0-553.144.1.rt7.485.el8_10, kernel-rt-debug-kvm 4.18.0-553.144.1.rt7.485.el8_10, kernel-rt-debug-core 4.18.0-553.144.1.rt7.485.el8_10, +4 more
    fixed: vendor fix RHSA-2026:39180
  • Red Hat Enterprise Linux Real Time (v. 9) kernel-rt 5.14.0-687.22.1.el9_8, kernel-rt-64k 5.14.0-687.22.1.el9_8, kernel-rt-core 5.14.0-687.22.1.el9_8, kernel-rt-modules 5.14.0-687.22.1.el9_8, kernel-rt-64k-core 5.14.0-687.22.1.el9_8, kernel-rt-debug-core 5.14.0-687.22.1.el9_8, +14 more
    fixed: vendor fix RHSA-2026:36018
  • Red Hat Enterprise Linux Real Time (v. 10) kernel-rt 6.12.0-211.37.1.el10_2, kernel-rt-64k 6.12.0-211.37.1.el10_2, kernel-rt-core 6.12.0-211.37.1.el10_2, kernel-rt-modules 6.12.0-211.37.1.el10_2, kernel-rt-64k-core 6.12.0-211.37.1.el10_2, kernel-rt-debug-core 6.12.0-211.37.1.el10_2, +14 more
    fixed: vendor fix RHSA-2026:42919
  • Red Hat Enterprise Linux Real Time E4S (v.9.2) kernel-rt 5.14.0-284.183.1.rt14.468.el9_2, kernel-rt-core 5.14.0-284.183.1.rt14.468.el9_2, kernel-rt-modules 5.14.0-284.183.1.rt14.468.el9_2, kernel-rt-debug-core 5.14.0-284.183.1.rt14.468.el9_2, kernel-rt-modules-core 5.14.0-284.183.1.rt14.468.el9_2, kernel-rt-debug-modules 5.14.0-284.183.1.rt14.468.el9_2, +4 more
    fixed: vendor fix RHSA-2026:47632
  • Red Hat Enterprise Linux Real Time E4S (v.9.4) kernel-rt 5.14.0-427.139.1.el9_4, kernel-rt-core 5.14.0-427.139.1.el9_4, kernel-rt-modules 5.14.0-427.139.1.el9_4, kernel-rt-debug-core 5.14.0-427.139.1.el9_4, kernel-rt-modules-core 5.14.0-427.139.1.el9_4, kernel-rt-debug-modules 5.14.0-427.139.1.el9_4, +4 more
    fixed: vendor fix RHSA-2026:43231
  • Red Hat Enterprise Linux Real Time EUS (v. 10.0) kernel-rt 6.12.0-55.88.1.el10_0, kernel-rt-64k 6.12.0-55.88.1.el10_0, kernel-rt-core 6.12.0-55.88.1.el10_0, kernel-rt-modules 6.12.0-55.88.1.el10_0, kernel-rt-64k-core 6.12.0-55.88.1.el10_0, kernel-rt-debug-core 6.12.0-55.88.1.el10_0, +14 more
    fixed: vendor fix RHSA-2026:39371
  • Red Hat Enterprise Linux Real Time EUS (v.9.6) kernel-rt 5.14.0-570.129.1.el9_6, kernel-rt-64k 5.14.0-570.129.1.el9_6, kernel-rt-core 5.14.0-570.129.1.el9_6, kernel-rt-modules 5.14.0-570.129.1.el9_6, kernel-rt-64k-core 5.14.0-570.129.1.el9_6, kernel-rt-debug-core 5.14.0-570.129.1.el9_6, +14 more
    fixed: vendor fix RHSA-2026:44385
  • Red Hat Enterprise Linux Real Time for NFV (v. 9) kernel-rt 5.14.0-687.22.1.el9_8, kernel-rt-core 5.14.0-687.22.1.el9_8, kernel-rt-modules 5.14.0-687.22.1.el9_8, kernel-rt-debug-core 5.14.0-687.22.1.el9_8, kernel-rt-modules-core 5.14.0-687.22.1.el9_8, kernel-rt-debug-modules 5.14.0-687.22.1.el9_8, +4 more
    fixed: vendor fix RHSA-2026:36018
  • Red Hat Enterprise Linux Real Time for NFV (v. 10) kernel-rt 6.12.0-211.37.1.el10_2, kernel-rt-core 6.12.0-211.37.1.el10_2, kernel-rt-modules 6.12.0-211.37.1.el10_2, kernel-rt-debug-core 6.12.0-211.37.1.el10_2, kernel-rt-modules-core 6.12.0-211.37.1.el10_2, kernel-rt-debug-modules 6.12.0-211.37.1.el10_2, +4 more
    fixed: vendor fix RHSA-2026:42919
  • Red Hat Enterprise Linux Real Time for NFV E4S (v.9.2) kernel-rt 5.14.0-284.183.1.rt14.468.el9_2, kernel-rt-kvm 5.14.0-284.183.1.rt14.468.el9_2, kernel-rt-core 5.14.0-284.183.1.rt14.468.el9_2, kernel-rt-modules 5.14.0-284.183.1.rt14.468.el9_2, kernel-rt-debug-kvm 5.14.0-284.183.1.rt14.468.el9_2, kernel-rt-debug-core 5.14.0-284.183.1.rt14.468.el9_2, +6 more
    fixed: vendor fix RHSA-2026:47632
  • Red Hat Enterprise Linux Real Time for NFV E4S (v.9.4) kernel-rt 5.14.0-427.139.1.el9_4, kernel-rt-kvm 5.14.0-427.139.1.el9_4, kernel-rt-core 5.14.0-427.139.1.el9_4, kernel-rt-modules 5.14.0-427.139.1.el9_4, kernel-rt-debug-kvm 5.14.0-427.139.1.el9_4, kernel-rt-debug-core 5.14.0-427.139.1.el9_4, +6 more
    fixed: vendor fix RHSA-2026:43231
  • Red Hat Enterprise Linux Real Time for NFV EUS (v. 10.0) kernel-rt 6.12.0-55.88.1.el10_0, kernel-rt-kvm 6.12.0-55.88.1.el10_0, kernel-rt-core 6.12.0-55.88.1.el10_0, kernel-rt-modules 6.12.0-55.88.1.el10_0, kernel-rt-debug-kvm 6.12.0-55.88.1.el10_0, kernel-rt-debug-core 6.12.0-55.88.1.el10_0, +6 more
    fixed: vendor fix RHSA-2026:39371
  • Red Hat Enterprise Linux Real Time for NFV EUS (v.9.6) kernel-rt 5.14.0-570.129.1.el9_6, kernel-rt-kvm 5.14.0-570.129.1.el9_6, kernel-rt-core 5.14.0-570.129.1.el9_6, kernel-rt-modules 5.14.0-570.129.1.el9_6, kernel-rt-debug-kvm 5.14.0-570.129.1.el9_6, kernel-rt-debug-core 5.14.0-570.129.1.el9_6, +6 more
    fixed: vendor fix RHSA-2026:44385
  • Red Hat Enterprise Linux RT (v. 8) kernel-rt 4.18.0-553.144.1.rt7.485.el8_10, kernel-rt-core 4.18.0-553.144.1.rt7.485.el8_10, kernel-rt-modules 4.18.0-553.144.1.rt7.485.el8_10, kernel-rt-debug-core 4.18.0-553.144.1.rt7.485.el8_10, kernel-rt-debug-modules 4.18.0-553.144.1.rt7.485.el8_10, kernel-rt-modules-extra 4.18.0-553.144.1.rt7.485.el8_10, +2 more
    fixed: vendor fix RHSA-2026:39180

2 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 SSVC

Exploitation
none
Automatable
no
Technical impact
total
Assessed
24 d ago

Exploit prediction

0.13% chance of exploitation in the next 30 days, higher than 2% 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 7.0 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
  • 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
  • CWE-763 Release of Invalid Pointer or Reference
  • CWE-416 Use After Free
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.