---
id: CVE-2026-64000
title: |-
  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 p…
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 p…
severity: critical
cvss: 9.8
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H'
cwe:
  - CWE-125
vendor: linux
product: linux_kernel
affected:
  - 'linux_kernel >= 5.16, < 6.1.176'
  - 'linux_kernel >= 6.2, < 6.6.143'
  - 'linux_kernel >= 6.7, < 6.12.93'
  - 'linux_kernel >= 6.13, < 6.18.35'
  - 'linux_kernel >= 6.19, < 7.0.12'
  - linux_kernel = 7.1
patched:
  - linux_kernel 7.0.12
published: '2026-07-19'
updated: '2026-10-08'
sourceUpdated: '2026-10-08T15:49:57.450'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-64000'
references:
  - url: 'https://git.kernel.org/stable/c/09a37dca090c55ffb1a33f52d8667f1c2367ef48'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/71c986c0ba45b7dc574fae27c83e7b6671556f37'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/78607a6854a22a2502f68092202e75a39af4865d'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/a4b64f3e9c7b8259f7dd251a0313420ba7c01852'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/f229426072fc865654a60978bb7fda790a051ff3'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/fbd0662f9c9a66e8cc3df3099cca8ed6d3837cc7'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
tags:
  - nvd
epss: 0.00491
epssPercentile: 0.40225
ingestedAt: '2026-10-08T16:52:14.704Z'
---

## Overview

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.

## Affected

- `linux_kernel >= 5.16, < 6.1.176`
- `linux_kernel >= 6.2, < 6.6.143`
- `linux_kernel >= 6.7, < 6.12.93`
- `linux_kernel >= 6.13, < 6.18.35`
- `linux_kernel >= 6.19, < 7.0.12`
- `linux_kernel = 7.1`

## Remediation

Upgrade past the affected range:

- `linux_kernel 7.0.12`