CVE-2025-53537

Name	CVE-2025-53537
Description	LibHTP is a security-aware parser for the HTTP protocol and its related bits and pieces. In versions 0.5.50 and below, there is a traffic-induced memory leak that can starve the process of memory, leading to loss of visibility. To workaround this issue, set `suricata.yaml app-layer.protocols.http.libhtp.default-config.lzma-enabled` to false. This issue is fixed in version 0.5.51.
Source	CVE (at NVD; CERT, LWN, oss-sec, fulldisc, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, GitHub advisories/code/issues, web search, more)
Debian Bugs	1109838

Vulnerable and fixed packages

The table below lists information on source packages.

Source Package	Release	Version	Status
libhtp (PTS)	bullseye	1:0.5.36-1	vulnerable
	bookworm	1:0.5.42-1	vulnerable
	trixie, sid	1:0.5.50-1	vulnerable

The information below is based on the following data on fixed versions.

Package	Type	Release	Fixed Version	Urgency	Origin	Debian Bugs
libhtp	source	(unstable)	(unfixed)			1109838

Notes

https://github.com/OISF/libhtp/security/advisories/GHSA-v3qq-h8mh-vph7
Fixed by: https://github.com/OISF/libhtp/commit/9037ea35110a0d97be5cedf8d31fb4cd9a38c7a7 (0.5.51)