CVE-2025-53537
Publication date 23 July 2025
Last updated 9 October 2025
Ubuntu priority
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.
Status
| Package | Ubuntu Release | Status |
|---|---|---|
| libhtp | 25.10 questing |
Vulnerable
|
| 25.04 plucky |
Fixed 1:0.5.49-1ubuntu0.1
|
|
| 24.04 LTS noble |
Fixed 1:0.5.46-1ubuntu2+esm1
|
|
| 22.04 LTS jammy |
Fixed 1:0.5.39-1ubuntu0.1~esm1
|
|
| 20.04 LTS focal |
Fixed 1:0.5.32-1ubuntu0.1~esm1
|
|
| 18.04 LTS bionic |
Fixed 1:0.5.26-1ubuntu0.1~esm1
|
|
| 16.04 LTS xenial |
Fixed 0.5.15-1ubuntu0.1~esm1
|
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Get Ubuntu Pro 30-day free trialSeverity score breakdown
| Parameter | Value |
|---|---|
| Base score |
7.5 · High
|
| Attack vector | Network |
| Attack complexity | Low |
| Privileges required | None |
| User interaction | None |
| Scope | Unchanged |
| Confidentiality | None |
| Integrity impact | None |
| Availability impact | High |
| Vector | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H |
References
Related Ubuntu Security Notices (USN)
- USN-7814-1
- LibHTP vulnerabilities
- 9 October 2025