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CVE-2025-53537

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

Published: Jul 23, 2025Updated: Aug 5, 2025 Sources: CVE List NVD BDUCWE-401
7.5HIGH
NVD MITRE
EPSS Score
0.4%
Top 66.4%
CISA KEV
Not in KEV
Exploits
No Known Exploits
Remediation
Patch Available
Self-Check
OpenVAS

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.

No summary for this CVE yet.

CVSS Vector Breakdown

AV:NAC:LPR:NUI:NS:UC:NI:NA:H
Exploitability
AV:NAttack Vector
Network
AC:LAttack Complexity
Low
PR:NPrivileges Required
None
UI:NUser Interaction
None
Scope
S:UScope
Unchanged
Impact
C:NConfidentiality
None
I:NIntegrity
None
A:HAvailability
High
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Weaknesses

CWE-401

Affected Products

OISF
oss-projectaka suricata-update, libhtp, suricata
libhtpOn-premLibrary
Networking Infrastructure / firewall
Open Information Security Foundation
oss-projectaka ofis, libhtp, suricata
LibHTPOn-prem
Security Products / vuln-mgmt-scanner
ООО «ТСС»
commercialaka diamond acs, diamond vpn//fw
МКСЗ «Diamond VPN//FW»On-prem
Networking Infrastructure / firewall
and 1 more affected products View all →

Exploitability

Official Patch Available
Workaround Available
Is your org exposed to CVE-2025-53537?We can run the check for you — a free external exposure review, no install. Check my exposure

References

https://github.com/OISF/libhtp/security/advisories/GHSA-v3qq-h8mh-vph7
github.com
https://github.com/OISF/libhtp/commit/9037ea35110a0d97be5cedf8d31fb4cd9a38c7a7
github.com
News mentions
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