---
id: CVE-2026-63835
title: |-
  In the Linux kernel, the following vulnerability has been resolved:

  batman-adv: v: prevent OGM aggregation on disabled hardif

  When an interface gets disabled, the worker is correctly disabled by
  batadv_hardif_disable_interface() -> ...…
summary: |-
  In the Linux kernel, the following vulnerability has been resolved:

  batman-adv: v: prevent OGM aggregation on disabled hardif

  When an interface gets disabled, the worker is correctly disabled by
  batadv_hardif_disable_interface() -> ...…
severity: none
published: '2026-07-19'
updated: '2026-08-17'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-63835'
references:
  - url: 'https://git.kernel.org/stable/c/3d4548c96d6f21ac1a9b06c5f82f3ef439c87023'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/86ab6b6fb5b82163bf6c45780bb72150021d7349'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/97644fdaaf6446ffbe182c5eb804fceb5b1a51b7'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/d11c00b95b2a3b3934007fc003dccc6fdcc061ad'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/d3569327fc7395b2b0461a0a0cb77a0bb74786c0'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/d462ced79dd430200cf888984e8005da77fc810b'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/f04dde74399431fb07abbdd9cd5d0ed624771d04'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/f79deaaf822ab0ee2424cf28781f9ab91576bea3'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
tags:
  - nvd
epss: 0.00174
epssPercentile: 0.06113
ingestedAt: '2026-08-17T06:48:45.104Z'
---

## Overview

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

batman-adv: v: prevent OGM aggregation on disabled hardif

When an interface gets disabled, the worker is correctly disabled by
batadv_hardif_disable_interface() -> ... -> batadv_v_ogm_iface_disable().
In this process, the skb aggr_list is also freed.

But batadv_v_ogm_send_meshif() can still queue new skbs (via
batadv_v_ogm_queue_on_if()) to the aggr_list. This will only stop after all
cores can no longer find the RCU protected list of hard interfaces. These
queued skbs will never be freed or consumed by batadv_v_ogm_aggr_work.

The batadv_v_ogm_iface_disable() function must block
batadv_v_ogm_queue_on_if() to avoid leak of skbs.

## Remediation

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