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Fencer Vulns
high 7.8

CVE-2026-46300 kev in the critical feed json

net: skbuff: preserve shared-frag marker during coalescing

published 2026-05-23 5 mo ago modified 2026-10-29 10 d ago also EUVD-2026-31535

cvss
7.8
version 3.1, CNA
cisa kev
Exploited
added 2026-10-28
epss
16.1%
EPSS 16.1% chance of exploitation in 30 days, percentile 96%
public exploits
2
Metasploit, Exploit-DB

Summary

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

net: skbuff: preserve shared-frag marker during coalescing

skb_try_coalesce() can attach paged frags from @from to @to. If @from has SKBFL_SHARED_FRAG set, the resulting @to skb can contain the same externally-owned or page-cache-backed frags, but the shared-frag marker is currently lost.

That breaks the invariant relied on by later in-place writers. In particular, ESP input checks skb_has_shared_frag() before deciding whether an uncloned nonlinear skb can skip skb_cow_data(). If TCP receive coalescing has moved shared frags into an unmarked skb, ESP can see skb_has_shared_frag() as false and decrypt in place over page-cache backed frags.

Propagate SKBFL_SHARED_FRAG when skb_try_coalesce() transfers paged frags. The tailroom copy path does not need the marker because it copies bytes into @to's linear data rather than transferring frag descriptors.

Patch / fix

cisa required action Apply mitigations in accordance with vendor instructions, ensuring compliance with CISA’s BOD 26-04 Prioritizing Security Updates Based on Risk (see URL in Notes) guidance and CISA’s “Forensics Triage Requirements” (see URL in Notes). Follow applicable BOD 26-04 guidance for cloud services or discontinue use of the product if mitigations are unavailable. Stakeholders are responsible for evaluating each asset's internet exposure and ensuring adherence to BOD 26-04 patching guidelines.

  • 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 4.14 414.92.202606231112-0
  • 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 4.17 417.94.202606250942-0
  • 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 0:4.21.0-202605142021.p2.geab2218.assembly.stream.el10, 0:5.14.0-570.116.1.el9_6, 4.21.9.6.202606030721-0
  • Siemens SIMATIC S7-1500 CPU 1518-4 PN/DP MFP V3.1.7
  • Siemens SIMATIC S7-1500 CPU 1518F-4 PN/DP MFP V3.1.7
  • Siemens SIPLUS S7-1500 CPU 1518-4 PN/DP MFP V3.1.7
  • 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-2026-46300

  • 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-2026-46300

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-64kb SLE Module for Basesystem 15 SP7 6.4.0-150700.53.55.1
  • kernel-syms SLE Module for Development Tools 15 SP7 6.4.0-150700.53.55.1
  • kernel-azure SLE Module for Public Cloud 15 SP7 6.4.0-150700.53.55.1
  • kernel-source SLE Module for Development Tools 15 SP7, SLE Module for Basesystem 15 SP7 6.4.0-150700.53.55.1
  • kernel-default SLE Workstation Extension 15 SP7, SLE Module for Legacy 15 SP7, SLE Module for Basesystem 15 SP7 +2 more 6.4.0-150700.53.55.1
  • kernel-zfcpdump SLE Module for Basesystem 15 SP7 6.4.0-150700.53.55.1
  • kernel-obs-build SLE Module for Development Tools 15 SP7 6.4.0-150700.53.55.1
  • kernel-default-base SLE Module for Basesystem 15 SP7 6.4.0-150700.53.55.1.150700.17.33.1

suse advisories SUSE-SU-2026:2238-1SUSE-SU-2026:22425-1SUSE-SU-2026:22474-1SUSE-SU-2026:22411-1SUSE-SU-2026:22412-1SUSE-SU-2026:22488-1

  • 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-2026:19666ALSA-2026:A008ALSA-2026:A009

  • kernel Rocky Linux 10 6.12.0-211.16.1.el10_2.0.1
  • kernel Rocky Linux 9 5.14.0-687.10.1.el9_8.0.1
  • kernel-rt Rocky Linux 8 4.18.0-553.125.1.rt7.466.el8_10
  • kernel Rocky Linux 8 4.18.0-553.125.1.el8_10

rocky linux advisories RLSA-2026:19569RLSA-2026:19568RLSA-2026:19664RLSA-2026:19666

  • kernel Azure Linux 3.0 6.6.141.1-1

azure linux advisories AZL-87351

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-2026-46300 updated cvss 7.8

kernel: "Fragnesia" is a variant of Dirty Frag vulnerability in the ESP/XFRM leading to Local Privilege Escalation (LPE) vulnerability in the Linux kernel

  • 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

16 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-26-209-04 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) >= 3.1.6 Siemens SIMATIC S7-1500 CPU 1518-4 PN/DP MFP (6ES7518-4AX00-1AC0) >= 3.1.6 Siemens SIMATIC S7-1500 CPU 1518F-4 PN/DP MFP (6ES7518-4FX00-1AB0) >= 3.1.6 Siemens SIMATIC S7-1500 CPU 1518F-4 PN/DP MFP (6ES7518-4FX00-1AC0) >= 3.1.6 Siemens SIPLUS S7-1500 CPU 1518-4 PN/DP MFP (6AG1518-4AX00-4AC0) >= 3.1.6
    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-26-174-06 updated cvss 7.8

Impact of Linux Kernel vulnerabilities on B&R products

  • B&R Industrial Automation GmbH APROL <APROL-AutoYaST-DVD-_V4.4-010.10.260602
    affected: vendor fix
  • B&R Industrial Automation GmbH Linux for B&R <=12 B&R Industrial Automation GmbH X20EDS410 /all
    affected: workaround, mitigation
  • B&R Industrial Automation GmbH APROL APROL-AutoYaST-DVD-_V4.4-010.10.260602
    fixed

Facts from CISA's republication of the vendor's own advisory (CSAF); the linked advisory is the authoritative source. CISA notification · csaf

Timeline

  1. CISA SSVC: exploitation active
  2. First public exploit (Metasploit exploit/linux/local/cve_2026_46300_fragnesia)
  3. Published
  4. Added to CISA KEV
  5. CISA patch deadline

Known exploited

Added
12 d ago
Patch by
2026-10-31 (9 d ago)
Ransomware
Not known
Required action
Apply mitigations in accordance with vendor instructions, ensuring compliance with CISA’s BOD 26-04 Prioritizing Security Updates Based on Risk (see URL in Notes) guidance and CISA’s “Forensics Triage Requirements” (see URL in Notes). Follow applicable BOD 26-04 guidance for cloud services or discontinue use of the product if mitigations are unavailable. Stakeholders are responsible for evaluating each asset's internet exposure and ensuring adherence to BOD 26-04 patching guidelines.
Vendor, product
Linux, Kernel
CISA name
Linux Kernel Missing Initialization of a Variable Vulnerability

CISA SSVC

Exploitation
Active, exploited in the wild
Automatable
no
Technical impact
total
Assessed
5 mo ago

Exploit prediction

16.13% chance of exploitation in the next 30 days, higher than 96% of all scored CVEs (FIRST EPSS, 2026-11-08).

Exploits and checks

CVSS scores

assigned by version score vector
CNA 3.1 7.8 CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
CISA ADP 3.1 7.8 CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
NVD 3.1 7.8 CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Affected products

  • Linux Linux
  • Red Hat 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 4.14
  • Red Hat Red Hat OpenShift Container Platform 4.15
  • Red Hat Red Hat OpenShift Container Platform 4.16
  • Red Hat Red Hat OpenShift Container Platform 4.17
  • Red Hat Red Hat OpenShift Container Platform 4.18
  • Red Hat Red Hat OpenShift Container Platform 4.19
  • Red Hat Red Hat OpenShift Container Platform 4.20
  • Red Hat Red Hat OpenShift Container Platform 4.21
  • Red Hat Red Hat Enterprise Linux 6
  • Red Hat Red Hat Enterprise Linux 7
  • Siemens SIMATIC S7-1500 CPU 1518-4 PN/DP MFP
  • Siemens SIMATIC S7-1500 CPU 1518F-4 PN/DP MFP
  • Siemens SIPLUS S7-1500 CPU 1518-4 PN/DP MFP

Classification

Weakness
  • CWE-123 Write-what-where Condition
  • CWE-456 Missing Initialization of a Variable
  • CWE-787 Out-of-bounds Write
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.