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Fencer Intel
critical 9.8

CVE-2026-64000 in the critical feed json

net: hsr: fix potential OOB access in supervision frame handling

published 3mo ago modified 23d ago also EUVD-2026-45573

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:

net: hsr: fix potential OOB access in supervision frame handling

Ensure the entire TLV header is linearized before access by adding sizeof(struct hsr_sup_tlv) to the pskb_may_pull() calls. Without this, a truncated frame could cause an out-of-bounds access.

Patch / fix

  • Linux Linux 6.1.176, 6.6.143, 6.12.93, 6.18.35, 7.0.12, 7.1
  • linux Debian 12 6.1.176-1
  • linux Debian 13 6.12.94-1
  • linux Debian 14 7.0.12-1

debian advisories DEBIAN-CVE-2026-64000

  • linux Ubuntu 24.04 LTS 6.8.0-142.142
  • linux Ubuntu 26.04 LTS 7.0.0-28.28
  • linux-aws Ubuntu 24.04 LTS 6.8.0-1065.68
  • linux-aws Ubuntu 26.04 LTS 7.0.0-1009.9
  • linux-gcp Ubuntu 24.04 LTS 6.8.0-1069.77
  • linux-gcp Ubuntu 26.04 LTS 7.0.0-1008.8
  • linux-gke Ubuntu 24.04 LTS 6.8.0-1064.72
  • linux-gke Ubuntu 26.04 LTS 7.0.0-1003.4

ubuntu advisories UBUNTU-CVE-2026-64000

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-64kb SLE Module for Basesystem 15 SP7 6.4.0-150700.53.81.1
  • kernel-syms SLE Module for Development Tools 15 SP7 6.4.0-150700.53.81.1
  • kernel-azure SLE Module for Public Cloud 15 SP7 6.4.0-150700.53.81.1
  • kernel-source SLE Module for Development Tools 15 SP7, SLE Module for Basesystem 15 SP7 6.4.0-150700.53.81.1
  • kernel-default SLE Workstation Extension 15 SP7, SLE Module for Legacy 15 SP7, SLE Module for Basesystem 15 SP7 +2 more 6.4.0-150700.53.81.1
  • kernel-zfcpdump SLE Module for Basesystem 15 SP7 6.4.0-150700.53.81.1
  • kernel-obs-build SLE Module for Development Tools 15 SP7 6.4.0-150700.53.81.1
  • kernel-default-base SLE Module for Basesystem 15 SP7 6.4.0-150700.53.81.1.150700.17.45.1

suse advisories SUSE-SU-2026:4254-1SUSE-SU-2026:24107-1SUSE-SU-2026:24108-1SUSE-SU-2026:24174-1SUSE-SU-2026:24175-1SUSE-SU-2026:24106-1

  • kernel-rt openSUSE Leap 16.0 6.12.0-160000.38.1
  • dtb-aarch64 openSUSE Leap 16.0 6.12.0-160000.38.1
  • kernel-64kb openSUSE Leap 16.0 6.12.0-160000.38.1
  • kernel-syms openSUSE Leap 16.0 6.12.0-160000.38.1
  • kernel-azure openSUSE Leap 16.0 6.12.0-160000.38.1
  • kernel-obs-qa openSUSE Leap 16.0 6.12.0-160000.38.1
  • kernel-source openSUSE Leap 16.0 6.12.0-160000.38.1
  • kernel-default openSUSE Leap 16.0 6.12.0-160000.38.1

opensuse advisories openSUSE-SU-2026:21910-1

Is CVE-2026-64000 in your stack? Fencer shows which of your repositories are affected as soon as an advisory lands, and opens the fix as a pull request.

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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-2026-64000 updated cvss 6.5

kernel: net: hsr: fix potential OOB access in supervision frame handling

  • Red Hat Enterprise Linux AppStream (v. 9) rv 5.14.0-741.14.1.el9_9, perf 5.14.0-741.14.1.el9_9, rtla 5.14.0-741.14.1.el9_9, python3-perf 5.14.0-741.14.1.el9_9, kernel-devel-matched 5.14.0-741.14.1.el9_9, kernel-64k-devel-matched 5.14.0-741.14.1.el9_9, +7 more
    fixed: vendor fix RHSA-2026:97435
  • Red Hat Enterprise Linux AppStream (v. 10) rv 6.12.0-264.9.1.el10_3, perf 6.12.0-264.9.1.el10_3, rtla 6.12.0-264.9.1.el10_3, python3-perf 6.12.0-264.9.1.el10_3, kernel-devel-matched 6.12.0-264.9.1.el10_3, kernel-64k-devel-matched 6.12.0-264.9.1.el10_3, +7 more
    fixed: vendor fix RHSA-2026:97040
  • Red Hat Enterprise Linux BaseOS (v. 9) kernel 5.14.0-741.14.1.el9_9, kernel-64k 5.14.0-741.14.1.el9_9, kernel-core 5.14.0-741.14.1.el9_9, kernel-tools 5.14.0-741.14.1.el9_9, kernel-modules 5.14.0-741.14.1.el9_9, kernel-64k-core 5.14.0-741.14.1.el9_9, +27 more
    fixed: vendor fix RHSA-2026:97435
  • Red Hat Enterprise Linux BaseOS (v. 10) kernel 6.12.0-264.9.1.el10_3, kernel-64k 6.12.0-264.9.1.el10_3, kernel-core 6.12.0-264.9.1.el10_3, kernel-tools 6.12.0-264.9.1.el10_3, kernel-modules 6.12.0-264.9.1.el10_3, kernel-64k-core 6.12.0-264.9.1.el10_3, +28 more
    fixed: vendor fix RHSA-2026:97040
  • Red Hat Enterprise Linux CodeReady Linux Builder (v. 9) libperf 5.14.0-741.14.1.el9_9, kernel-debuginfo-common-s390x 5.14.0-741.14.1.el9_9, kernel-debuginfo-common-x86_64 5.14.0-741.14.1.el9_9, kernel-debuginfo-common-aarch64 5.14.0-741.14.1.el9_9, kernel-debuginfo-common-ppc64le 5.14.0-741.14.1.el9_9
    fixed: vendor fix RHSA-2026:97435
  • Red Hat Enterprise Linux CodeReady Linux Builder (v. 10) libperf 6.12.0-264.9.1.el10_3, kernel-debuginfo-common-s390x 6.12.0-264.9.1.el10_3, kernel-debuginfo-common-x86_64 6.12.0-264.9.1.el10_3, kernel-debuginfo-common-aarch64 6.12.0-264.9.1.el10_3, kernel-debuginfo-common-ppc64le 6.12.0-264.9.1.el10_3
    fixed: vendor fix RHSA-2026:97040
  • Red Hat Enterprise Linux Real Time (v. 9) kernel-rt 5.14.0-741.14.1.el9_9, kernel-rt-64k 5.14.0-741.14.1.el9_9, kernel-rt-core 5.14.0-741.14.1.el9_9, kernel-rt-modules 5.14.0-741.14.1.el9_9, kernel-rt-64k-core 5.14.0-741.14.1.el9_9, kernel-rt-debug-core 5.14.0-741.14.1.el9_9, +14 more
    fixed: vendor fix RHSA-2026:97435
  • Red Hat Enterprise Linux Real Time (v. 10) kernel-rt 6.12.0-264.9.1.el10_3, kernel-rt-64k 6.12.0-264.9.1.el10_3, kernel-rt-core 6.12.0-264.9.1.el10_3, kernel-rt-modules 6.12.0-264.9.1.el10_3, kernel-rt-64k-core 6.12.0-264.9.1.el10_3, kernel-rt-debug-core 6.12.0-264.9.1.el10_3, +14 more
    fixed: vendor fix RHSA-2026:97040
show 3 more
  • Red Hat Enterprise Linux Real Time for NFV (v. 9) kernel-rt 5.14.0-741.14.1.el9_9, kernel-rt-core 5.14.0-741.14.1.el9_9, kernel-rt-modules 5.14.0-741.14.1.el9_9, kernel-rt-debug-core 5.14.0-741.14.1.el9_9, kernel-rt-modules-core 5.14.0-741.14.1.el9_9, kernel-rt-debug-modules 5.14.0-741.14.1.el9_9, +5 more
    fixed: vendor fix RHSA-2026:97435
  • Red Hat Enterprise Linux Real Time for NFV (v. 10) kernel-rt 6.12.0-264.9.1.el10_3, kernel-rt-core 6.12.0-264.9.1.el10_3, kernel-rt-modules 6.12.0-264.9.1.el10_3, kernel-rt-debug-core 6.12.0-264.9.1.el10_3, kernel-rt-modules-core 6.12.0-264.9.1.el10_3, kernel-rt-debug-modules 6.12.0-264.9.1.el10_3, +5 more
    fixed: vendor fix RHSA-2026:97040
  • Red Hat Enterprise Linux 6 perf, kernel, python-perf, kernel-kdump, kernel-firmware, kernel-bootwrapper, +1 more Red Hat Enterprise Linux 7 perf, kernel, bpftool, kernel-rt, python-perf, kernel-kdump, +8 more Red Hat Enterprise Linux 8 perf, kernel, bpftool, kernel-rt, kernel-core, kernel-tools, +29 more 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
    not affected: vulnerable code not present

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

CISA SSVC

Exploitation
none
Automatable
yes
Technical impact
total
Assessed
26d ago

Exploit prediction

0.49% chance of exploitation in the next 30 days, higher than 42% of all scored CVEs (FIRST EPSS, 2026-11-11).

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

Classification

Weakness
Technology feeds

References

Sources

Fencer Intel 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.