---
id: CVE-2026-89949
title: |-
  In the Linux kernel, the following vulnerability has been resolved:

  batman-adv: dat: avoid unaligned fault in IP extraction

  Independent of the alignment of the ARP packet in the SKB, either the
  batadv_arp_ip_src or the batadv_arp_ip_ds…
summary: |-
  In the Linux kernel, the following vulnerability has been resolved:

  batman-adv: dat: avoid unaligned fault in IP extraction

  Independent of the alignment of the ARP packet in the SKB, either the
  batadv_arp_ip_src or the batadv_arp_ip_ds…
severity: none
vendor: Linux
product: Linux
affected:
  - >-
    Linux >= 5c3a0e5535933349a5d6e6bc8b704e0611f21d3f <
    b1bbc694ca51adb8dbed3f3235b4fcbdb44e0e20
  - >-
    Linux >= 5c3a0e5535933349a5d6e6bc8b704e0611f21d3f <
    15dbfb37f0e1a085d48deeb8f5238e9d28127dde
  - >-
    Linux >= 5c3a0e5535933349a5d6e6bc8b704e0611f21d3f <
    a170d4617e8cca05a1314de61728a262ef272782
  - >-
    Linux >= 5c3a0e5535933349a5d6e6bc8b704e0611f21d3f <
    c74a4acf41d19f21199dec2d6c813c90d31cd02c
  - >-
    Linux >= 5c3a0e5535933349a5d6e6bc8b704e0611f21d3f <
    91c99b4e152023c7d458a5dedd52d2b0d7df4ce3
  - >-
    Linux >= 5c3a0e5535933349a5d6e6bc8b704e0611f21d3f <
    1cfa7d5f70d54cb8c7e82df739430782d1996ee1
  - >-
    Linux >= 5c3a0e5535933349a5d6e6bc8b704e0611f21d3f <
    0c2df865338bbf92aa45b9253e5f9b8ef2d9992f
  - >-
    Linux >= 5c3a0e5535933349a5d6e6bc8b704e0611f21d3f <
    0121afa52cdb88cfb4d5d7bd126a23a9100121d8
  - Linux 3.8
published: '2026-09-16'
updated: '2026-09-16'
sourceUpdated: '2026-09-16T11:17:05.030'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-89949'
references:
  - url: 'https://git.kernel.org/stable/c/0121afa52cdb88cfb4d5d7bd126a23a9100121d8'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/0c2df865338bbf92aa45b9253e5f9b8ef2d9992f'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/15dbfb37f0e1a085d48deeb8f5238e9d28127dde'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/1cfa7d5f70d54cb8c7e82df739430782d1996ee1'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/91c99b4e152023c7d458a5dedd52d2b0d7df4ce3'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/a170d4617e8cca05a1314de61728a262ef272782'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/b1bbc694ca51adb8dbed3f3235b4fcbdb44e0e20'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/c74a4acf41d19f21199dec2d6c813c90d31cd02c'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
tags:
  - nvd
  - cve.org
ingestedAt: '2026-09-16T10:53:53.963Z'
epss: 0.0022
epssPercentile: 0.11038
---

## Overview

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

batman-adv: dat: avoid unaligned fault in IP extraction

Independent of the alignment of the ARP packet in the SKB, either the
batadv_arp_ip_src or the batadv_arp_ip_dst will have an unaligned access
(on HW without native unaligned read support).

Use get_unaligned() to handle this properly on all architectures.

## Remediation

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