CVE-2025-53537

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

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.

Category

7.5
CVSS
Severity: High
CVSS 3.1 •
EPSS 0.04%
Vendor Advisory github.com
Affected: OISF libhtp
Published at:
Updated at:

References

Link Tags
https://github.com/OISF/libhtp/security/advisories/GHSA-v3qq-h8mh-vph7 vendor advisory mitigation
https://github.com/OISF/libhtp/commit/9037ea35110a0d97be5cedf8d31fb4cd9a38c7a7 patch

Frequently Asked Questions

What is the severity of CVE-2025-53537?
CVE-2025-53537 has been scored as a high severity vulnerability.
How to fix CVE-2025-53537?
To fix CVE-2025-53537, make sure you are using an up-to-date version of the affected component(s) by checking the vendor release notes. As for now, there are no other specific guidelines available.
Is CVE-2025-53537 being actively exploited in the wild?
As for now, there are no information to confirm that CVE-2025-53537 is being actively exploited. According to its EPSS score, there is a ~0% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
What software or system is affected by CVE-2025-53537?
CVE-2025-53537 affects OISF libhtp.
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