CVE-2025-53537CWE-401

LibHTP's memory leak with lzma can lead to resource starvation

High · published July 23, 2025

CVSS v3.1
7.5
EPSS
0%
Percentile
39.5
In the wild
Unconfirmed
What it is

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.

The record
Technical detail
CVSS v3.1
7.5 · HIGH
Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
CVSS v4.0
Not supplied
EPSS
0.00467 · 39.5th percentile
Weakness
CWE-401 · Missing Release of Memory after Effective Lifetime
Published
2025-07-23T20:35Z
EPSS history
Timeline
  • 23 JUL 20:35Z
    LibHTP's memory leak with lzma can lead to resource starvation
    cvelistv5