---
id: CVE-2026-72233
title: 'batman-adv: bla: reacquire gw address after skb realloc'
summary: |-
  In the Linux kernel, the following vulnerability has been resolved:

  batman-adv: bla: reacquire gw address after skb realloc

  The pskb_may_pull() called by batadv_bla_is_backbone_gw() could reallocate
  the buffer behind the skb. Variables…
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 >= 9e794b6bf4a2c65d698d7433ddfabc54a5d53a88 <
    41819c5467b6eb8ab4567f0ac98702ce9b6abbb1
  - >-
    Linux >= 9e794b6bf4a2c65d698d7433ddfabc54a5d53a88 <
    a9ab19fbca86b32e9a9ae9e1a63e70a7eab3400f
  - >-
    Linux >= 9e794b6bf4a2c65d698d7433ddfabc54a5d53a88 <
    4a6673c55752a7aa41e28f51660eb981504ca088
  - >-
    Linux >= 9e794b6bf4a2c65d698d7433ddfabc54a5d53a88 <
    ab2bac47a02637df1128a151e81d3ec14767f4bb
  - >-
    Linux >= 9e794b6bf4a2c65d698d7433ddfabc54a5d53a88 <
    dc16bbf53cede1baf564bf0c8a861114b64e18b3
  - >-
    Linux >= 9e794b6bf4a2c65d698d7433ddfabc54a5d53a88 <
    e5e18886aadd3870e2d84e32a9678317fab1dd9e
  - >-
    Linux >= 9e794b6bf4a2c65d698d7433ddfabc54a5d53a88 <
    f4fb97ecf677cd9c3aa4f3bfc6fbf5b0e4bdbbbf
  - >-
    Linux >= 9e794b6bf4a2c65d698d7433ddfabc54a5d53a88 <
    cdf3b5af2bc4431e58629e8ad2086b1e9185c761
  - Linux 4.12
ssvc:
  exploitation: none
  automatable: 'no'
  technicalImpact: total
  timestamp: '2026-10-16T18:44:31.631012Z'
published: '2026-08-15'
updated: '2026-10-16'
sourceUpdated: '2026-10-16T18:45:03.576Z'
source: CVEORG
sourceUrl: 'https://www.cve.org/CVERecord?id=CVE-2026-72233'
references:
  - url: 'https://git.kernel.org/stable/c/41819c5467b6eb8ab4567f0ac98702ce9b6abbb1'
  - url: 'https://git.kernel.org/stable/c/a9ab19fbca86b32e9a9ae9e1a63e70a7eab3400f'
  - url: 'https://git.kernel.org/stable/c/4a6673c55752a7aa41e28f51660eb981504ca088'
  - url: 'https://git.kernel.org/stable/c/ab2bac47a02637df1128a151e81d3ec14767f4bb'
  - url: 'https://git.kernel.org/stable/c/dc16bbf53cede1baf564bf0c8a861114b64e18b3'
  - url: 'https://git.kernel.org/stable/c/e5e18886aadd3870e2d84e32a9678317fab1dd9e'
  - url: 'https://git.kernel.org/stable/c/f4fb97ecf677cd9c3aa4f3bfc6fbf5b0e4bdbbbf'
  - url: 'https://git.kernel.org/stable/c/cdf3b5af2bc4431e58629e8ad2086b1e9185c761'
tags:
  - cve.org
epss: 0.00344
epssPercentile: 0.26352
ingestedAt: '2026-10-16T19:46:24.419Z'
---

## Overview

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

batman-adv: bla: reacquire gw address after skb realloc

The pskb_may_pull() called by batadv_bla_is_backbone_gw() 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.

## Affected

- `Linux >= 9e794b6bf4a2c65d698d7433ddfabc54a5d53a88 < 41819c5467b6eb8ab4567f0ac98702ce9b6abbb1`
- `Linux >= 9e794b6bf4a2c65d698d7433ddfabc54a5d53a88 < a9ab19fbca86b32e9a9ae9e1a63e70a7eab3400f`
- `Linux >= 9e794b6bf4a2c65d698d7433ddfabc54a5d53a88 < 4a6673c55752a7aa41e28f51660eb981504ca088`
- `Linux >= 9e794b6bf4a2c65d698d7433ddfabc54a5d53a88 < ab2bac47a02637df1128a151e81d3ec14767f4bb`
- `Linux >= 9e794b6bf4a2c65d698d7433ddfabc54a5d53a88 < dc16bbf53cede1baf564bf0c8a861114b64e18b3`
- `Linux >= 9e794b6bf4a2c65d698d7433ddfabc54a5d53a88 < e5e18886aadd3870e2d84e32a9678317fab1dd9e`
- `Linux >= 9e794b6bf4a2c65d698d7433ddfabc54a5d53a88 < f4fb97ecf677cd9c3aa4f3bfc6fbf5b0e4bdbbbf`
- `Linux >= 9e794b6bf4a2c65d698d7433ddfabc54a5d53a88 < cdf3b5af2bc4431e58629e8ad2086b1e9185c761`
- `Linux 4.12`

## Remediation

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