Skip to content
Fencer Vulns
high 8.8

CVE-2026-43503 json

net: skbuff: propagate shared-frag marker through frag-transfer helpers

published 2026-05-23 5 mo ago modified 2026-10-16 23 d ago also EUVD-2026-31536

cvss
8.8
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
2.0%
EPSS 2.0% chance of exploitation in 30 days, percentile 80%
public exploits
1
Metasploit

Summary

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

net: skbuff: propagate shared-frag marker through frag-transfer helpers

Two frag-transfer helpers (__pskb_copy_fclone() and skb_shift()) fail to propagate the SKBFL_SHARED_FRAG bit in skb_shinfo()->flags when moving frags from source to destination. __pskb_copy_fclone() defers the rest of the shinfo metadata to skb_copy_header() after copying frag descriptors, but that helper only carries over gso_{size,segs, type} and never touches skb_shinfo()->flags; skb_shift() moves frag descriptors directly and leaves flags untouched. As a result, the destination skb keeps a reference to the same externally-owned or page-cache-backed pages while reporting skb_has_shared_frag() as false.

The mismatch is harmful in any in-place writer that uses skb_has_shared_frag() to decide whether shared pages must be detoured through skb_cow_data(). ESP input is one such writer (esp4.c, esp6.c), and a single nft 'dup to <local>' rule -- or any other nf_dup_ipv4() / xt_TEE caller -- is enough to land a pskb_copy()'d skb in esp_input() with the marker stripped, letting an unprivileged user write into the page cache of a root-owned read-only file via authencesn-ESN stray writes.

Set SKBFL_SHARED_FRAG on the destination whenever frag descriptors were actually moved from the source. skb_copy() and skb_copy_expand() share skb_copy_header() too but linearize all paged data into freshly allocated head storage and emerge with nr_frags == 0, so skb_has_shared_frag() returns false on its own; they need no change.

The same omission exists in skb_gro_receive() and skb_gro_receive_list(). The former moves the incoming skb's frag descriptors into the accumulator's last sub-skb via two paths (a direct frag-move loop and the head_frag + memcpy path); the latter chains the incoming skb whole onto p's frag_list. Downstream skb_segment() reads only skb_shinfo(p)->flags, and skb_segment_list() reuses each sub-skb's shinfo as the nskb -- both p and lp must carry the marker.

The same omission also exists in tcp_clone_payload(), which builds an MTU probe skb by moving frag descriptors from skbs on sk_write_queue into a freshly allocated nskb. The helper falls into the same family and warrants the same fix for consistency; no TCP TX-side in-place writer is currently known to reach a user page through this gap, but a future consumer depending on the marker would regress silently.

The same omission exists in skb_segment(): the per-iteration flag merge takes only head_skb's flag, and the inner switch that rebinds frag_skb to list_skb on head_skb-frags exhaustion does not fold the new frag_skb's flag into nskb. Fold frag_skb's flag at both sites so segments drawing frags from frag_list members carry the marker.

Patch / fix

  • Linux Linux 5.10.257, 5.15.208, 6.1.174, 6.6.141, 6.12.91, 6.18.33, 7.0.10, 7.1
  • Red Hat NVIDIA for RHEL 10 0:6.12.0-211.8.el10nv, 0:6.12.0-231.12.el10nv
  • Red Hat Red Hat Enterprise Linux 10 0:6.12.0-211.16.1.el10_2
  • Red Hat Red Hat Enterprise Linux 10.0 Extended Update Support 0:6.12.0-55.75.1.el10_0
  • Red Hat Red Hat Enterprise Linux 8 0:4.18.0-553.125.1.el8_10, 0:4.18.0-553.125.1.rt7.466.el8_10
  • Red Hat Red Hat Enterprise Linux 8.4 Advanced Mission Critical Update Support 0:4.18.0-305.192.1.el8_4
  • Red Hat Red Hat Enterprise Linux 8.4 Extended Update Support Long-Life Add-On 0:4.18.0-305.192.1.el8_4
  • Red Hat Red Hat Enterprise Linux 8.6 Advanced Mission Critical Update Support 0:4.18.0-372.193.1.el8_6
  • Red Hat Red Hat Enterprise Linux 8.6 Telecommunications Update Service 0:4.18.0-372.193.1.el8_6
  • Red Hat Red Hat Enterprise Linux 8.6 Update Services for SAP Solutions 0:4.18.0-372.193.1.el8_6
  • Red Hat Red Hat Enterprise Linux 8.8 Telecommunications Update Service 0:4.18.0-477.143.1.el8_8
  • Red Hat Red Hat Enterprise Linux 8.8 Update Services for SAP Solutions 0:4.18.0-477.143.1.el8_8
  • Red Hat Red Hat Enterprise Linux 9 0:5.14.0-687.10.1.el9_8
  • Red Hat Red Hat Enterprise Linux 9.0 Update Services for SAP Solutions 0:5.14.0-70.180.1.el9_0, 0:5.14.0-70.180.1.rt21.252.el9_0
  • Red Hat Red Hat Enterprise Linux 9.2 Update Services for SAP Solutions 0:5.14.0-284.172.1.el9_2, 0:5.14.0-284.172.1.rt14.457.el9_2
  • Red Hat Red Hat Enterprise Linux 9.4 Extended Update Support 0:5.14.0-427.126.1.el9_4
  • Red Hat Red Hat Enterprise Linux 9.6 Extended Update Support 0:5.14.0-570.116.1.el9_6
  • Red Hat Red Hat OpenShift Container Platform 4.12 412.86.202605271418-0
  • Red Hat Red Hat OpenShift Container Platform 4.13 413.92.202605271328-0
  • Red Hat Red Hat OpenShift Container Platform 4.15 415.92.202606030318-0
  • Red Hat Red Hat OpenShift Container Platform 4.16 416.94.202605200242-0, 416.94.202606051757-0
  • Red Hat Red Hat OpenShift Container Platform 4.18 418.94.202605260517-0
  • Red Hat Red Hat OpenShift Container Platform 4.19 4.19.9.6.202606031700-0
  • Red Hat Red Hat OpenShift Container Platform 4.20 4.20.9.6.202605270908-0
  • Red Hat Red Hat OpenShift Container Platform 4.21 4.21.9.6.202606030721-0
  • linux Debian 12 6.1.174-1
  • linux Debian 13 6.12.90-1
  • linux Debian 14 7.0.9-1

debian advisories DEBIAN-CVE-2026-43503

  • linux Ubuntu 22.04 LTS 5.15.0-181.191
  • linux Ubuntu 24.04 LTS 6.8.0-124.124
  • linux Ubuntu 25.10 6.17.0-35.35
  • linux Ubuntu 26.04 LTS 7.0.0-22.22
  • linux-aws Ubuntu 22.04 LTS 5.15.0-1109.116
  • linux-aws Ubuntu 24.04 LTS 6.8.0-1057.60
  • linux-aws Ubuntu 25.10 6.17.0-1017.17
  • linux-aws Ubuntu 26.04 LTS 7.0.0-1006.6

ubuntu advisories UBUNTU-CVE-2026-43503

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 enterprise linux nvidia 10 6.12.0-231.12.el10nv
  • rv enterprise linux nvidia 10 6.12.0-231.12.el10nv
  • perf enterprise linux nvidia 10 6.12.0-231.12.el10nv
  • rtla enterprise linux nvidia 10 6.12.0-231.12.el10nv
  • kernel-64k enterprise linux nvidia 10 6.12.0-231.12.el10nv
  • kernel-core enterprise linux nvidia 10 6.12.0-231.12.el10nv
  • kernel-tools enterprise linux nvidia 10 6.12.0-231.12.el10nv
  • python3-perf enterprise linux nvidia 10 6.12.0-231.12.el10nv

red hat advisories RHSA-2026:33486RHSA-2026:24814RHSA-2026:23470RHSA-2026:23471RHSA-2026:23468RHSA-2026:23469

  • kernel-rt Linux Micro 6.1, Linux Micro 6.0 6.4.0-48.1
  • kernel-source-rt Linux Micro 6.1, Linux Micro 6.0 6.4.0-48.1
  • 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

suse advisories SUSE-SU-2026:22433-1SUSE-SU-2026:22458-1SUSE-SU-2026:2238-1SUSE-SU-2026:22509-1SUSE-SU-2026:22508-1SUSE-SU-2026:22507-1

  • kernel-source openSUSE Tumbleweed 7.0.11-1.1

opensuse advisories openSUSE-SU-2026:10954-1

  • kernel AlmaLinux 9 5.14.0-687.10.1.el9_8
  • rv AlmaLinux 9 5.14.0-687.10.1.el9_8
  • perf AlmaLinux 9 5.14.0-687.10.1.el9_8
  • rtla AlmaLinux 9 5.14.0-687.10.1.el9_8
  • libperf AlmaLinux 9 5.14.0-687.10.1.el9_8
  • kernel-rt AlmaLinux 9 5.14.0-687.10.1.el9_8
  • kernel-64k AlmaLinux 9 5.14.0-687.10.1.el9_8
  • kernel-core AlmaLinux 9 5.14.0-687.10.1.el9_8

almalinux advisories ALSA-2026:19568ALSA-2026:19569ALSA-2026:19664ALSA-2026:19666

  • kernel Azure Linux 3.0 6.6.141.1-1

azure linux advisories AZL-87348

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-2026-43503 updated cvss 7.0

kernel: net: skbuff: propagate shared-frag marker through frag-transfer helpers

  • Red Hat NVIDIA for RHEL 10 rv 6.12.0-211.8.el10nv, rv 6.12.0-231.12.el10nv, perf 6.12.0-211.8.el10nv, rtla 6.12.0-211.8.el10nv, perf 6.12.0-231.12.el10nv, rtla 6.12.0-231.12.el10nv, +56 more
    fixed: vendor fix “See the security bulletin for a detailed mitigation procedure.” RHSA-2026:19540
  • Red Hat CodeReady Linux Builder EUS (v.9.4) libperf 5.14.0-427.126.1.el9_4, kernel-debuginfo-common-s390x 5.14.0-427.126.1.el9_4, kernel-debuginfo-common-x86_64 5.14.0-427.126.1.el9_4, kernel-debuginfo-common-aarch64 5.14.0-427.126.1.el9_4, kernel-debuginfo-common-ppc64le 5.14.0-427.126.1.el9_4
    fixed: vendor fix “See the security bulletin for a detailed mitigation procedure.” RHSA-2026:20054
  • Red Hat CodeReady Linux Builder EUS (v.9.6) libperf 5.14.0-570.116.1.el9_6, kernel-debuginfo-common-s390x 5.14.0-570.116.1.el9_6, kernel-debuginfo-common-x86_64 5.14.0-570.116.1.el9_6, kernel-debuginfo-common-aarch64 5.14.0-570.116.1.el9_6, kernel-debuginfo-common-ppc64le 5.14.0-570.116.1.el9_6
    fixed: vendor fix “See the security bulletin for a detailed mitigation procedure.” RHSA-2026:20129
  • Red Hat Enterprise Linux AppStream (v. 9) rv 5.14.0-687.10.1.el9_8, perf 5.14.0-687.10.1.el9_8, rtla 5.14.0-687.10.1.el9_8, python3-perf 5.14.0-687.10.1.el9_8, kernel-devel-matched 5.14.0-687.10.1.el9_8, kernel-64k-devel-matched 5.14.0-687.10.1.el9_8, +7 more
    fixed: vendor fix “See the security bulletin for a detailed mitigation procedure.” RHSA-2026:19568
  • Red Hat Enterprise Linux AppStream (v. 10) rv 6.12.0-211.16.1.el10_2, perf 6.12.0-211.16.1.el10_2, rtla 6.12.0-211.16.1.el10_2, python3-perf 6.12.0-211.16.1.el10_2, kernel-devel-matched 6.12.0-211.16.1.el10_2, kernel-64k-devel-matched 6.12.0-211.16.1.el10_2, +7 more
    fixed: vendor fix “See the security bulletin for a detailed mitigation procedure.” RHSA-2026:19569
  • Red Hat Enterprise Linux AppStream E4S (v.9.0) perf 5.14.0-70.180.1.el9_0, kernel-devel-matched 5.14.0-70.180.1.el9_0, kernel-debug-devel-matched 5.14.0-70.180.1.el9_0, kernel-debuginfo-common-s390x 5.14.0-70.180.1.el9_0, kernel-zfcpdump-devel-matched 5.14.0-70.180.1.el9_0, kernel-debuginfo-common-x86_64 5.14.0-70.180.1.el9_0, +2 more
    fixed: vendor fix “See the security bulletin for a detailed mitigation procedure.” RHSA-2026:19705
  • Red Hat Enterprise Linux AppStream E4S (v.9.2) perf 5.14.0-284.172.1.el9_2, rtla 5.14.0-284.172.1.el9_2, kernel-devel-matched 5.14.0-284.172.1.el9_2, kernel-64k-devel-matched 5.14.0-284.172.1.el9_2, kernel-debug-devel-matched 5.14.0-284.172.1.el9_2, kernel-debuginfo-common-s390x 5.14.0-284.172.1.el9_2, +5 more
    fixed: vendor fix “See the security bulletin for a detailed mitigation procedure.” RHSA-2026:20593
  • Red Hat Enterprise Linux AppStream EUS (v. 10.0) rv 6.12.0-55.75.1.el10_0, perf 6.12.0-55.75.1.el10_0, rtla 6.12.0-55.75.1.el10_0, python3-perf 6.12.0-55.75.1.el10_0, kernel-devel-matched 6.12.0-55.75.1.el10_0, kernel-64k-devel-matched 6.12.0-55.75.1.el10_0, +7 more
    fixed: vendor fix “See the security bulletin for a detailed mitigation procedure.” RHSA-2026:20299
show 31 more
  • Red Hat Enterprise Linux AppStream EUS (v.9.4) rv 5.14.0-427.126.1.el9_4, perf 5.14.0-427.126.1.el9_4, rtla 5.14.0-427.126.1.el9_4, kernel-devel-matched 5.14.0-427.126.1.el9_4, kernel-64k-devel-matched 5.14.0-427.126.1.el9_4, kernel-debug-devel-matched 5.14.0-427.126.1.el9_4, +6 more
    fixed: vendor fix “See the security bulletin for a detailed mitigation procedure.” RHSA-2026:20054
  • Red Hat Enterprise Linux AppStream EUS (v.9.6) rv 5.14.0-570.116.1.el9_6, perf 5.14.0-570.116.1.el9_6, rtla 5.14.0-570.116.1.el9_6, python3-perf 5.14.0-570.116.1.el9_6, kernel-devel-matched 5.14.0-570.116.1.el9_6, kernel-64k-devel-matched 5.14.0-570.116.1.el9_6, +7 more
    fixed: vendor fix “See the security bulletin for a detailed mitigation procedure.” RHSA-2026:20129
  • Red Hat Enterprise Linux BaseOS (v. 8) perf 4.18.0-553.125.1.el8_10, kernel 4.18.0-553.125.1.el8_10, bpftool 4.18.0-553.125.1.el8_10, kernel-core 4.18.0-553.125.1.el8_10, kernel-tools 4.18.0-553.125.1.el8_10, python3-perf 4.18.0-553.125.1.el8_10, +20 more
    fixed: vendor fix “See the security bulletin for a detailed mitigation procedure.” RHSA-2026:19666
  • Red Hat Enterprise Linux BaseOS (v. 9) kernel 5.14.0-687.10.1.el9_8, kernel-64k 5.14.0-687.10.1.el9_8, kernel-core 5.14.0-687.10.1.el9_8, kernel-tools 5.14.0-687.10.1.el9_8, kernel-modules 5.14.0-687.10.1.el9_8, kernel-64k-core 5.14.0-687.10.1.el9_8, +27 more
    fixed: vendor fix “See the security bulletin for a detailed mitigation procedure.” RHSA-2026:19568
  • Red Hat Enterprise Linux BaseOS (v. 10) kernel 6.12.0-211.16.1.el10_2, kernel-64k 6.12.0-211.16.1.el10_2, kernel-core 6.12.0-211.16.1.el10_2, kernel-tools 6.12.0-211.16.1.el10_2, kernel-modules 6.12.0-211.16.1.el10_2, kernel-64k-core 6.12.0-211.16.1.el10_2, +28 more
    fixed: vendor fix “See the security bulletin for a detailed mitigation procedure.” RHSA-2026:19569
  • Red Hat Enterprise Linux BaseOS AUS (v.8.4) perf 4.18.0-305.192.1.el8_4, kernel 4.18.0-305.192.1.el8_4, bpftool 4.18.0-305.192.1.el8_4, kernel-core 4.18.0-305.192.1.el8_4, kernel-tools 4.18.0-305.192.1.el8_4, python3-perf 4.18.0-305.192.1.el8_4, +8 more
    fixed: vendor fix “See the security bulletin for a detailed mitigation procedure.” RHSA-2026:20130
  • Red Hat Enterprise Linux BaseOS AUS (v.8.6) perf 4.18.0-372.193.1.el8_6, kernel 4.18.0-372.193.1.el8_6, bpftool 4.18.0-372.193.1.el8_6, kernel-core 4.18.0-372.193.1.el8_6, kernel-tools 4.18.0-372.193.1.el8_6, python3-perf 4.18.0-372.193.1.el8_6, +8 more Red Hat Enterprise Linux BaseOS E4S (v.8.6) perf 4.18.0-372.193.1.el8_6, kernel 4.18.0-372.193.1.el8_6, bpftool 4.18.0-372.193.1.el8_6, kernel-core 4.18.0-372.193.1.el8_6, kernel-tools 4.18.0-372.193.1.el8_6, python3-perf 4.18.0-372.193.1.el8_6, +15 more
    fixed: vendor fix “See the security bulletin for a detailed mitigation procedure.” RHSA-2026:20051
  • Red Hat Enterprise Linux BaseOS E4S (v.8.8) perf 4.18.0-477.143.1.el8_8, kernel 4.18.0-477.143.1.el8_8, bpftool 4.18.0-477.143.1.el8_8, kernel-core 4.18.0-477.143.1.el8_8, kernel-tools 4.18.0-477.143.1.el8_8, python3-perf 4.18.0-477.143.1.el8_8, +14 more
    fixed: vendor fix “See the security bulletin for a detailed mitigation procedure.” RHSA-2026:19521
  • Red Hat Enterprise Linux BaseOS E4S (v.9.0) kernel 5.14.0-70.180.1.el9_0, bpftool 5.14.0-70.180.1.el9_0, kernel-core 5.14.0-70.180.1.el9_0, kernel-tools 5.14.0-70.180.1.el9_0, python3-perf 5.14.0-70.180.1.el9_0, kernel-modules 5.14.0-70.180.1.el9_0, +14 more
    fixed: vendor fix “See the security bulletin for a detailed mitigation procedure.” RHSA-2026:19705
  • Red Hat Enterprise Linux BaseOS E4S (v.9.2) bpftool 7.0.0-284.172.1.el9_2, kernel 5.14.0-284.172.1.el9_2, kernel-64k 5.14.0-284.172.1.el9_2, kernel-core 5.14.0-284.172.1.el9_2, kernel-tools 5.14.0-284.172.1.el9_2, python3-perf 5.14.0-284.172.1.el9_2, +33 more
    fixed: vendor fix “See the security bulletin for a detailed mitigation procedure.” RHSA-2026:20593
  • Red Hat Enterprise Linux BaseOS E4S (v.9.4) kpatch-patch-5_14_0-427_84_1 1-7.el9_4, kpatch-patch-5_14_0-427_100_1 1-5.el9_4, kpatch-patch-5_14_0-427_113_1 1-3.el9_4, kpatch-patch-5_14_0-427_55_1 1-15.el9_4, kpatch-patch-5_14_0-427_68_2 1-12.el9_4
    fixed: vendor fix “See the security bulletin for a detailed mitigation procedure.” RHSA-2026:24814
  • Red Hat Enterprise Linux BaseOS EUS (v. 10.0) kernel 6.12.0-55.75.1.el10_0, kernel-64k 6.12.0-55.75.1.el10_0, kernel-core 6.12.0-55.75.1.el10_0, kernel-tools 6.12.0-55.75.1.el10_0, kernel-modules 6.12.0-55.75.1.el10_0, kernel-64k-core 6.12.0-55.75.1.el10_0, +27 more
    fixed: vendor fix “See the security bulletin for a detailed mitigation procedure.” RHSA-2026:20299
  • Red Hat Enterprise Linux BaseOS EUS (v.9.4) bpftool 7.3.0-427.126.1.el9_4, kernel 5.14.0-427.126.1.el9_4, kernel-64k 5.14.0-427.126.1.el9_4, kernel-core 5.14.0-427.126.1.el9_4, kernel-tools 5.14.0-427.126.1.el9_4, python3-perf 5.14.0-427.126.1.el9_4, +28 more
    fixed: vendor fix “See the security bulletin for a detailed mitigation procedure.” RHSA-2026:20054
  • Red Hat Enterprise Linux BaseOS EUS (v.9.6) kernel 5.14.0-570.116.1.el9_6, kernel-64k 5.14.0-570.116.1.el9_6, kernel-core 5.14.0-570.116.1.el9_6, kernel-tools 5.14.0-570.116.1.el9_6, kernel-modules 5.14.0-570.116.1.el9_6, kernel-64k-core 5.14.0-570.116.1.el9_6, +31 more
    fixed: vendor fix “See the security bulletin for a detailed mitigation procedure.” RHSA-2026:20129
  • Red Hat Enterprise Linux BaseOS EUS EXTENSION (v.8.4) perf 4.18.0-305.192.1.el8_4, kernel 4.18.0-305.192.1.el8_4, bpftool 4.18.0-305.192.1.el8_4, kernel-core 4.18.0-305.192.1.el8_4, kernel-tools 4.18.0-305.192.1.el8_4, python3-perf 4.18.0-305.192.1.el8_4, +8 more
    fixed: vendor fix “See the security bulletin for a detailed mitigation procedure.” RHSA-2026:20130
  • Red Hat Enterprise Linux BaseOS TUS (v.8.6) perf 4.18.0-372.193.1.el8_6, kernel 4.18.0-372.193.1.el8_6, bpftool 4.18.0-372.193.1.el8_6, kernel-core 4.18.0-372.193.1.el8_6, kernel-tools 4.18.0-372.193.1.el8_6, python3-perf 4.18.0-372.193.1.el8_6, +8 more
    fixed: vendor fix “See the security bulletin for a detailed mitigation procedure.” RHSA-2026:20051
  • Red Hat Enterprise Linux BaseOS TUS (v.8.8) perf 4.18.0-477.143.1.el8_8, kernel 4.18.0-477.143.1.el8_8, bpftool 4.18.0-477.143.1.el8_8, kernel-core 4.18.0-477.143.1.el8_8, kernel-tools 4.18.0-477.143.1.el8_8, python3-perf 4.18.0-477.143.1.el8_8, +8 more
    fixed: vendor fix “See the security bulletin for a detailed mitigation procedure.” RHSA-2026:19521
  • Red Hat Enterprise Linux CodeReady Linux Builder (v. 9) libperf 5.14.0-687.10.1.el9_8, kernel-debuginfo-common-s390x 5.14.0-687.10.1.el9_8, kernel-debuginfo-common-x86_64 5.14.0-687.10.1.el9_8, kernel-debuginfo-common-aarch64 5.14.0-687.10.1.el9_8, kernel-debuginfo-common-ppc64le 5.14.0-687.10.1.el9_8
    fixed: vendor fix “See the security bulletin for a detailed mitigation procedure.” RHSA-2026:19568
  • Red Hat Enterprise Linux CodeReady Linux Builder (v. 10) libperf 6.12.0-211.16.1.el10_2, kernel-debuginfo-common-s390x 6.12.0-211.16.1.el10_2, kernel-debuginfo-common-x86_64 6.12.0-211.16.1.el10_2, kernel-debuginfo-common-aarch64 6.12.0-211.16.1.el10_2, kernel-debuginfo-common-ppc64le 6.12.0-211.16.1.el10_2
    fixed: vendor fix “See the security bulletin for a detailed mitigation procedure.” RHSA-2026:19569
  • Red Hat Enterprise Linux CodeReady Linux Builder EUS (v. 10.0) libperf 6.12.0-55.75.1.el10_0, kernel-debuginfo-common-s390x 6.12.0-55.75.1.el10_0, kernel-debuginfo-common-x86_64 6.12.0-55.75.1.el10_0, kernel-debuginfo-common-aarch64 6.12.0-55.75.1.el10_0, kernel-debuginfo-common-ppc64le 6.12.0-55.75.1.el10_0
    fixed: vendor fix “See the security bulletin for a detailed mitigation procedure.” RHSA-2026:20299
  • Red Hat Enterprise Linux CRB (v. 8) kernel-debuginfo-common-x86_64 4.18.0-553.125.1.el8_10, kernel-debuginfo-common-aarch64 4.18.0-553.125.1.el8_10, kernel-debuginfo-common-ppc64le 4.18.0-553.125.1.el8_10
    fixed: vendor fix “See the security bulletin for a detailed mitigation procedure.” RHSA-2026:19666
  • Red Hat Enterprise Linux NFV (v. 8) kernel-rt 4.18.0-553.125.1.rt7.466.el8_10, kernel-rt-kvm 4.18.0-553.125.1.rt7.466.el8_10, kernel-rt-core 4.18.0-553.125.1.rt7.466.el8_10, kernel-rt-modules 4.18.0-553.125.1.rt7.466.el8_10, kernel-rt-debug-kvm 4.18.0-553.125.1.rt7.466.el8_10, kernel-rt-debug-core 4.18.0-553.125.1.rt7.466.el8_10, +4 more
    fixed: vendor fix “See the security bulletin for a detailed mitigation procedure.” RHSA-2026:19664
  • Red Hat Enterprise Linux NFV E4S (v.9.0) kernel-rt 5.14.0-70.180.1.rt21.252.el9_0, kernel-rt-kvm 5.14.0-70.180.1.rt21.252.el9_0, kernel-rt-core 5.14.0-70.180.1.rt21.252.el9_0, kernel-rt-modules 5.14.0-70.180.1.rt21.252.el9_0, kernel-rt-debug-kvm 5.14.0-70.180.1.rt21.252.el9_0, kernel-rt-debug-core 5.14.0-70.180.1.rt21.252.el9_0, +4 more
    fixed: vendor fix “See the security bulletin for a detailed mitigation procedure.” RHSA-2026:19711
  • Red Hat Enterprise Linux Real Time (v. 9) kernel-rt 5.14.0-687.10.1.el9_8, kernel-rt-64k 5.14.0-687.10.1.el9_8, kernel-rt-core 5.14.0-687.10.1.el9_8, kernel-rt-modules 5.14.0-687.10.1.el9_8, kernel-rt-64k-core 5.14.0-687.10.1.el9_8, kernel-rt-debug-core 5.14.0-687.10.1.el9_8, +14 more
    fixed: vendor fix “See the security bulletin for a detailed mitigation procedure.” RHSA-2026:19568
  • Red Hat Enterprise Linux Real Time (v. 10) kernel-rt 6.12.0-211.16.1.el10_2, kernel-rt-64k 6.12.0-211.16.1.el10_2, kernel-rt-core 6.12.0-211.16.1.el10_2, kernel-rt-modules 6.12.0-211.16.1.el10_2, kernel-rt-64k-core 6.12.0-211.16.1.el10_2, kernel-rt-debug-core 6.12.0-211.16.1.el10_2, +14 more
    fixed: vendor fix “See the security bulletin for a detailed mitigation procedure.” RHSA-2026:19569
  • Red Hat Enterprise Linux Real Time E4S (v.9.0) kernel-rt 5.14.0-70.180.1.rt21.252.el9_0, kernel-rt-core 5.14.0-70.180.1.rt21.252.el9_0, kernel-rt-modules 5.14.0-70.180.1.rt21.252.el9_0, kernel-rt-debug-core 5.14.0-70.180.1.rt21.252.el9_0, kernel-rt-debug-modules 5.14.0-70.180.1.rt21.252.el9_0, kernel-rt-modules-extra 5.14.0-70.180.1.rt21.252.el9_0, +2 more
    fixed: vendor fix “See the security bulletin for a detailed mitigation procedure.” RHSA-2026:19711
  • Red Hat Enterprise Linux Real Time E4S (v.9.2) kernel-rt 5.14.0-284.172.1.rt14.457.el9_2, kernel-rt-core 5.14.0-284.172.1.rt14.457.el9_2, kernel-rt-modules 5.14.0-284.172.1.rt14.457.el9_2, kernel-rt-debug-core 5.14.0-284.172.1.rt14.457.el9_2, kernel-rt-modules-core 5.14.0-284.172.1.rt14.457.el9_2, kernel-rt-debug-modules 5.14.0-284.172.1.rt14.457.el9_2, +4 more
    fixed: vendor fix “See the security bulletin for a detailed mitigation procedure.” RHSA-2026:19875
  • Red Hat Enterprise Linux Real Time EUS (v. 10.0) kernel-rt 6.12.0-55.75.1.el10_0, kernel-rt-64k 6.12.0-55.75.1.el10_0, kernel-rt-core 6.12.0-55.75.1.el10_0, kernel-rt-modules 6.12.0-55.75.1.el10_0, kernel-rt-64k-core 6.12.0-55.75.1.el10_0, kernel-rt-debug-core 6.12.0-55.75.1.el10_0, +14 more
    fixed: vendor fix “See the security bulletin for a detailed mitigation procedure.” RHSA-2026:20299
  • Red Hat Enterprise Linux Real Time EUS (v.9.4) kernel-rt 5.14.0-427.126.1.el9_4, kernel-rt-core 5.14.0-427.126.1.el9_4, kernel-rt-modules 5.14.0-427.126.1.el9_4, kernel-rt-debug-core 5.14.0-427.126.1.el9_4, kernel-rt-modules-core 5.14.0-427.126.1.el9_4, kernel-rt-debug-modules 5.14.0-427.126.1.el9_4, +4 more
    fixed: vendor fix “See the security bulletin for a detailed mitigation procedure.” RHSA-2026:20054
  • Red Hat Enterprise Linux Real Time EUS (v.9.6) kernel-rt 5.14.0-570.116.1.el9_6, kernel-rt-64k 5.14.0-570.116.1.el9_6, kernel-rt-core 5.14.0-570.116.1.el9_6, kernel-rt-modules 5.14.0-570.116.1.el9_6, kernel-rt-64k-core 5.14.0-570.116.1.el9_6, kernel-rt-debug-core 5.14.0-570.116.1.el9_6, +14 more
    fixed: vendor fix “See the security bulletin for a detailed mitigation procedure.” RHSA-2026:20129
  • Red Hat Enterprise Linux Real Time for NFV (v. 9) kernel-rt 5.14.0-687.10.1.el9_8, kernel-rt-core 5.14.0-687.10.1.el9_8, kernel-rt-modules 5.14.0-687.10.1.el9_8, kernel-rt-debug-core 5.14.0-687.10.1.el9_8, kernel-rt-modules-core 5.14.0-687.10.1.el9_8, kernel-rt-debug-modules 5.14.0-687.10.1.el9_8, +4 more
    fixed: vendor fix “See the security bulletin for a detailed mitigation procedure.” RHSA-2026:19568

14 more fixed, 2 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-26-295-16 updated cvss 8.8

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

Timeline

  1. First public exploit (Metasploit exploit/linux/local/dirtyclone_cve_2026_43503)
  2. Published

CISA SSVC

Exploitation
none
Automatable
no
Technical impact
total
Assessed
23 d ago

Exploit prediction

1.99% chance of exploitation in the next 30 days, higher than 80% of all scored CVEs (FIRST EPSS, 2026-11-08).

Exploits and checks

CVSS scores

assigned by version score vector
CNA 3.1 8.8 CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/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 NVIDIA for RHEL 10
  • 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 Telecommunications Update Service
  • Red Hat Red Hat Enterprise Linux 8.6 Update Services for SAP Solutions
  • 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 9.0 Update Services for SAP Solutions
  • Red Hat Red Hat Enterprise Linux 9.2 Update Services for SAP Solutions
  • Red Hat Red Hat Enterprise Linux 9.4 Extended Update Support
  • 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 4.15
  • Red Hat Red Hat OpenShift Container Platform 4.16
  • 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 Enterprise Linux 6
  • Red Hat Red Hat Enterprise Linux 7
  • Red Hat Red Hat OpenShift Container Platform 4
  • Siemens SIMATIC S7-1500 TM MFP - GNU/Linux subsystem

Classification

Weakness
  • CWE-664 Improper Control of a Resource Through its Lifetime
  • CWE-691 Insufficient Control Flow Management
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.