---
id: CVE-2026-80599
title: |-
  In the Linux kernel, the following vulnerability has been resolved:

  batman-adv: dat: ensure accessible eth_hdr proto field

  When batadv_get_vid() accesses the proto field of the ethernet header, it
  is not checking if the data itself is …
summary: |-
  In the Linux kernel, the following vulnerability has been resolved:

  batman-adv: dat: ensure accessible eth_hdr proto field

  When batadv_get_vid() accesses the proto field of the ethernet header, it
  is not checking if the data itself is …
severity: high
cvss: 8.1
cvssVector: 'CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H'
published: '2026-08-28'
updated: '2026-08-29'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-80599'
references:
  - url: 'https://git.kernel.org/stable/c/26560c4a03dc4d607331600c187f59ab2df5f341'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/3c62694c31f043568c3f4784b8d247cc3bea6b4c'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/4407ff3af469356f9641c4a6e7072309bae86bea'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/5836a050d02e9598fa0f71e88dde28b63dfa35e3'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/6d3ea37074bb747f745d28138f87745ba9bd97c5'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/7913935d41f166c367bbf7cc76a79e50044388e8'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/8f76277d02176cd739945bba3379448e2e22e799'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/da3677b5ed362742d30ceab31bfafcdc74dc2642'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
tags:
  - nvd
epss: 0.00419
epssPercentile: 0.33467
ingestedAt: '2026-08-29T21:42:36.973Z'
---

## Overview

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

batman-adv: dat: ensure accessible eth_hdr proto field

When batadv_get_vid() accesses the proto field of the ethernet header, it
is not checking if the data itself is accessible. The caller is responsible
for it. But in contrast to other call sites, batadv_dat_get_vid() and its
caller didn't make sure this is true. This could have caused an
out-of-bounds access.

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.