NULL Pointer Dereference Affecting apache2 package, versions <2.4.67-r0


Severity

Recommended
low

Based on default assessment until relevant scores are available.

Threat Intelligence

EPSS
0.59% (44th percentile)

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  • Snyk IDSNYK-ALPINE321-APACHE2-16425723
  • published6 May 2026
  • disclosed4 May 2026

Introduced: 4 May 2026

CVE-2026-29169  (opens in a new tab)
CWE-476  (opens in a new tab)

How to fix?

Upgrade Alpine:3.21 apache2 to version 2.4.67-r0 or higher.

NVD Description

Note: Versions mentioned in the description apply only to the upstream apache2 package and not the apache2 package as distributed by Alpine. See How to fix? for Alpine:3.21 relevant fixed versions and status.

A NULL pointer dereference in mod_dav_lock in Apache HTTP Server 2.4.66 and earlier may allow an attacker to crash the server with a malicious request.mod_dav_lock is not used internally by mod_dav or mod_dav_fs.

The only known use-case for mod_dav_lock was mod_dav_svn from Apache Subversion earlier than version 1.2.0.

Users are recommended to upgrade to version 2.4.66, which fixes this issue, or remove mod_dav_lock.

CVSS Base Scores

version 3.1