---
id: CVE-2026-72235
title: 'batman-adv: retrieve ethhdr after potential skb realloc on RX'
summary: |-
  In the Linux kernel, the following vulnerability has been resolved:

  batman-adv: retrieve ethhdr after potential skb realloc on RX

  pskb_may_pull() in batadv_interface_rx() could reallocate the buffer behind
  the skb. Variables which were…
severity: high
cvss: 8.8
cvssVector: 'CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H'
cvssSource: cna
vendor: Linux
product: Linux
affected:
  - >-
    Linux >= c6c8fea29769d998d94fcec9b9f14d4b52b349d3 <
    6e189f14d1ea28db212b9d70a02131a7ce518012
  - >-
    Linux >= c6c8fea29769d998d94fcec9b9f14d4b52b349d3 <
    a1820344b180cb55af748f102bc536b5c93164db
  - >-
    Linux >= c6c8fea29769d998d94fcec9b9f14d4b52b349d3 <
    6abf73589bed3f27ee240c08108feb72bed0b9c6
  - >-
    Linux >= c6c8fea29769d998d94fcec9b9f14d4b52b349d3 <
    f19259395b44af67f3c274e34237c295b526b859
  - >-
    Linux >= c6c8fea29769d998d94fcec9b9f14d4b52b349d3 <
    2cefa5141cab8ec1e4b24cf585958b13f2e3049d
  - >-
    Linux >= c6c8fea29769d998d94fcec9b9f14d4b52b349d3 <
    85a71a81854e0e191ad0e533eabb4eff54866feb
  - >-
    Linux >= c6c8fea29769d998d94fcec9b9f14d4b52b349d3 <
    b031fc97e1993d29d6c3a0e86a99140528cf31e8
  - >-
    Linux >= c6c8fea29769d998d94fcec9b9f14d4b52b349d3 <
    035e1fed892d3d06002a73ff73668f618a514644
  - Linux 2.6.38
ssvc:
  exploitation: none
  automatable: 'no'
  technicalImpact: total
  timestamp: '2026-10-16T18:44:43.790792Z'
published: '2026-08-15'
updated: '2026-10-16'
sourceUpdated: '2026-10-16T18:45:04.206Z'
source: CVEORG
sourceUrl: 'https://www.cve.org/CVERecord?id=CVE-2026-72235'
references:
  - url: 'https://git.kernel.org/stable/c/6e189f14d1ea28db212b9d70a02131a7ce518012'
  - url: 'https://git.kernel.org/stable/c/a1820344b180cb55af748f102bc536b5c93164db'
  - url: 'https://git.kernel.org/stable/c/6abf73589bed3f27ee240c08108feb72bed0b9c6'
  - url: 'https://git.kernel.org/stable/c/f19259395b44af67f3c274e34237c295b526b859'
  - url: 'https://git.kernel.org/stable/c/2cefa5141cab8ec1e4b24cf585958b13f2e3049d'
  - url: 'https://git.kernel.org/stable/c/85a71a81854e0e191ad0e533eabb4eff54866feb'
  - url: 'https://git.kernel.org/stable/c/b031fc97e1993d29d6c3a0e86a99140528cf31e8'
  - url: 'https://git.kernel.org/stable/c/035e1fed892d3d06002a73ff73668f618a514644'
tags:
  - cve.org
epss: 0.00344
epssPercentile: 0.26351
ingestedAt: '2026-10-16T19:46:24.420Z'
---

## Overview

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

batman-adv: retrieve ethhdr after potential skb realloc on RX

pskb_may_pull() in batadv_interface_rx() could reallocate the buffer behind
the skb. Variables which were pointing to the old buffer need to be
reassigned to avoid an use-after-free.

This was done correctly for the VLAN header but missed for the ethernet
header which is later used for the TT and AP isolation handling.

## Affected

- `Linux >= c6c8fea29769d998d94fcec9b9f14d4b52b349d3 < 6e189f14d1ea28db212b9d70a02131a7ce518012`
- `Linux >= c6c8fea29769d998d94fcec9b9f14d4b52b349d3 < a1820344b180cb55af748f102bc536b5c93164db`
- `Linux >= c6c8fea29769d998d94fcec9b9f14d4b52b349d3 < 6abf73589bed3f27ee240c08108feb72bed0b9c6`
- `Linux >= c6c8fea29769d998d94fcec9b9f14d4b52b349d3 < f19259395b44af67f3c274e34237c295b526b859`
- `Linux >= c6c8fea29769d998d94fcec9b9f14d4b52b349d3 < 2cefa5141cab8ec1e4b24cf585958b13f2e3049d`
- `Linux >= c6c8fea29769d998d94fcec9b9f14d4b52b349d3 < 85a71a81854e0e191ad0e533eabb4eff54866feb`
- `Linux >= c6c8fea29769d998d94fcec9b9f14d4b52b349d3 < b031fc97e1993d29d6c3a0e86a99140528cf31e8`
- `Linux >= c6c8fea29769d998d94fcec9b9f14d4b52b349d3 < 035e1fed892d3d06002a73ff73668f618a514644`
- `Linux 2.6.38`

## Remediation

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