CVE-2025-53537 HIGH

CVE-2025-53537: LibHTP's memory leak with lzma can lead to resource starvation

Vendor Oisf
Product libhtp
Weakness CWE-401
Published July 23, 2025
Last update July 23, 2025
View on NVD All CVEs

CVSS base score

7.5/10
Attack vector Network
Attack complexity Low
Privileges required None
User interaction None
Confidentiality None
Integrity None

CVSS vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

What the vulnerability does

01Description

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.

Key dates

02Disclosure timeline

July 23, 2025 CVE published
July 23, 2025 Record updated