CVE-2026-29169
Description
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.
Predictions
Heuristic predictions, AS-IS, for prioritization only.
Mitigations
No mitigations published for this CVE yet.
The vendor-content worker queues fetches as references arrive (check back in a few minutes). Or — if you've already worked around this in production — publish your fix to the community-verified tier.
✚ Propose a mitigation on Community → Mitigations published via the community go through AI scoring + 2 human reviewers + 7-day silent objection window before landing here withsource_tier=community-verified.
OS impact
| OS | Version | Status | Fixed in |
|---|---|---|---|
| debian | bookworm | fixed | 2.4.67-1~deb12u2 |
| debian | bullseye | fixed | 2.4.67-1~deb11u1 |
| debian | forky | fixed | 2.4.67-1 |
| debian | sid | fixed | 2.4.67-1 |
| debian | trixie | fixed | 2.4.67-1~deb13u2 |
| sles | affected | | |
| windows | affected | |
Application impact
| Vendor | Product | Versions | Fixed |
|---|---|---|---|
| apache | http_server | {"endExcluding":"2.4.67"} | 2.4.67 |
References
- https://security-tracker.debian.org/tracker/CVE-2026-29169
- https://httpd.apache.org/security/vulnerabilities_24.html
- http://www.openwall.com/lists/oss-security/2026/05/04/20
- http://www.openwall.com/lists/oss-security/2026/05/05/12
- https://www.suse.com/security/cve/CVE-2026-29169.html
- https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-29169
CWEs
CWE-476
Community-verified mitigations for this CVE will appear above when contributors publish them.
Verify integrity in audit chain (admin only). AS-IS.