---
id: CVE-2026-72373
title: 'afs: Fix missing NULL pointer check in afs_break_some_callbacks()'
summary: |-
  In the Linux kernel, the following vulnerability has been resolved:

  afs: Fix missing NULL pointer check in afs_break_some_callbacks()

  Fix afs_break_some_callbacks() to check to see if afs_lookup_volume_rcu()
  returned NULL (e.g. the spe…
severity: high
cvss: 7.5
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H'
cvssSource: cna
vendor: Linux
product: Linux
affected:
  - >-
    Linux >= 8230fd8217b7ea76f838ae88e4a5a8e54f37099f <
    a99a617701186dc68c7b330d35fc2253f48e2ab2
  - >-
    Linux >= 8230fd8217b7ea76f838ae88e4a5a8e54f37099f <
    5492799ec5d27be3bd454dcaf046bc7054f637ae
  - >-
    Linux >= 8230fd8217b7ea76f838ae88e4a5a8e54f37099f <
    e3e59ff22a0de01ed0cf3a3e25558811abc3b70a
  - >-
    Linux >= 8230fd8217b7ea76f838ae88e4a5a8e54f37099f <
    794a01110390c1b76f59ece773fb0fbfd89c6f5c
  - Linux 5.8
ssvc:
  exploitation: none
  automatable: 'yes'
  technicalImpact: partial
  timestamp: '2026-10-16T18:48:08.172358Z'
published: '2026-08-15'
updated: '2026-10-16'
sourceUpdated: '2026-10-16T18:55:20.560Z'
source: CVEORG
sourceUrl: 'https://www.cve.org/CVERecord?id=CVE-2026-72373'
references:
  - url: 'https://git.kernel.org/stable/c/a99a617701186dc68c7b330d35fc2253f48e2ab2'
  - url: 'https://git.kernel.org/stable/c/5492799ec5d27be3bd454dcaf046bc7054f637ae'
  - url: 'https://git.kernel.org/stable/c/e3e59ff22a0de01ed0cf3a3e25558811abc3b70a'
  - url: 'https://git.kernel.org/stable/c/794a01110390c1b76f59ece773fb0fbfd89c6f5c'
tags:
  - cve.org
epss: 0.0063
epssPercentile: 0.49109
ingestedAt: '2026-10-16T19:46:24.402Z'
---

## Overview

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

afs: Fix missing NULL pointer check in afs_break_some_callbacks()

Fix afs_break_some_callbacks() to check to see if afs_lookup_volume_rcu()
returned NULL (e.g. the specified volume is unknown).

## Affected

- `Linux >= 8230fd8217b7ea76f838ae88e4a5a8e54f37099f < a99a617701186dc68c7b330d35fc2253f48e2ab2`
- `Linux >= 8230fd8217b7ea76f838ae88e4a5a8e54f37099f < 5492799ec5d27be3bd454dcaf046bc7054f637ae`
- `Linux >= 8230fd8217b7ea76f838ae88e4a5a8e54f37099f < e3e59ff22a0de01ed0cf3a3e25558811abc3b70a`
- `Linux >= 8230fd8217b7ea76f838ae88e4a5a8e54f37099f < 794a01110390c1b76f59ece773fb0fbfd89c6f5c`
- `Linux 5.8`

## Remediation

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