This page tracks the Ubuntu fix status. The vulnerability itself is described on the main CVE page.
View CVE-2026-56154 →
UBUNTU-CVE-2026-56154
Use After Free vulnerability in Apache HTTP Server's mod_rewrite when using lookahead (%{LA-U:HTTP:...}) This issue affects Apache HTTP Server: from 2...
Original description
The description as published by the source.
Use After Free vulnerability in Apache HTTP Server's mod_rewrite when using lookahead (%{LA-U:HTTP:...}) This issue affects Apache HTTP Server: from 2.4.0 through 2.4.68.
Source: OSV.dev (Open Source Vulnerabilities) OSV
Affected packages
Ubuntu:Pro:14.04:LTS
apache2
[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2.4.7-1ubuntu4.22+esm16"}]}]
Ubuntu:Pro:16.04:LTS
apache2
[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2.4.18-2ubuntu3.17+esm21"}]}]
Ubuntu:Pro:18.04:LTS
apache2
[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2.4.29-1ubuntu4.27+esm12"}]}]
Ubuntu:Pro:20.04:LTS
apache2
[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2.4.41-4ubuntu3.23+esm8"}]}]
Ubuntu:22.04:LTS
apache2
[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2.4.52-1ubuntu4.24"}]}]
Ubuntu:24.04:LTS
apache2
[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2.4.58-1ubuntu8.16"}]}]
Ubuntu:26.10
apache2
[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}]
Ubuntu:26.04:LTS
apache2
[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2.4.66-2ubuntu2.5"}]}]
References
- advisory ubuntu.com
- report ubuntu.com
- report cve.org
- report httpd.apache.org
- report httpd.apache.org
- report openwall.com