CVE-2025-53537
Fixed in a distro release EPSS <1%CVSS 7.5
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.
Products: OISF libhtp
Distro releases
| Release | Package | Fixed in |
|---|---|---|
| Debian 13 | libhtp | 1:0.5.50-1+deb13u1 |
| Ubuntu 25.10 | libhtp | no fix |
| Ubuntu 26.04 LTS | libhtp | no fix |
| Ubuntu Pro 16.04 LTS | libhtp | 0.5.15-1ubuntu0.1~esm1 |
| Ubuntu Pro 18.04 LTS | libhtp | 1:0.5.26-1ubuntu0.1~esm1 |
| Ubuntu Pro 20.04 LTS | libhtp | 1:0.5.32-1ubuntu0.1~esm1 |
| Ubuntu Pro 22.04 LTS | libhtp | 1:0.5.39-1ubuntu0.1~esm1 |
| Ubuntu Pro 24.04 LTS | libhtp | 1:0.5.46-1ubuntu2+esm1 |