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 remote Ubuntu 16.04 LTS / 18.04 LTS / 20.04 LTS / 22.04 LTS / 24.04 LTS / 25.04 host has packages installed that are affected by multiple vulnerabilities as referenced in the USN-7814-1 advisory.

    It was discovered that LibHTP did not correctly handle certain HTTP headers. A remote attacker could     possibly use this issue to cause a denial of service. This issue only affected Ubuntu 16.04 LTS, Ubuntu     18.04 LTS, Ubuntu 20.04 LTS and Ubuntu 22.04 LTS. (CVE-2024-23837)

    It was discovered that LibHTP did not correctly parse certain HTTP requests. A remote attacker could     possibly use this issue to cause a denial of service. This issue only affected Ubuntu 20.04 LTS, Ubuntu     22.04 LTS and Ubuntu 24.04 LTS. (CVE-2024-28871)

    It was discovered that LibHTP did not correctly parse certain HTTP requests. A remote attacker could     possibly use this issue to cause a denial of service. (CVE-2024-45797)

    It was discovered that LibHTP did not correctly handle certain memory operations. A remote attacker could     possibly use this issue to cause a denial of service. This issue only affected Ubuntu 20.04 LTS, Ubuntu     22.04 LTS, Ubuntu 24.04 LTS and Ubuntu 25.04. (CVE-2025-53537)

Tenable has extracted the preceding description block directly from the Ubuntu security advisory.

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

The remote Fedora 41 host has a package installed that is affected by multiple vulnerabilities as referenced in the FEDORA-2025-a029ba03cc advisory.

    CVE-2025-53537: HIGH     CVE-2025-53538: HIGH

Tenable has extracted the preceding description block directly from the Fedora security advisory.

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

The remote Fedora 42 host has a package installed that is affected by multiple vulnerabilities as referenced in the FEDORA-2025-f555a9146a advisory.

    CVE-2025-53537: HIGH     CVE-2025-53538: HIGH

Tenable has extracted the preceding description block directly from the Fedora security advisory.

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

The Linux/Unix host has one or more packages installed that are impacted by a vulnerability without a vendor supplied patch available.

  - 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. (CVE-2025-53537)

Note that Nessus relies on the presence of the package as reported by the vendor.

ID	Name	Product	Family	Severity
269999	Ubuntu 16.04 LTS / 18.04 LTS / 20.04 LTS / 22.04 LTS / 24.04 LTS / 25.04 : LibHTP vulnerabilities (USN-7814-1)	Nessus	Ubuntu Local Security Checks	high
253435	Fedora 41 : suricata (2025-a029ba03cc)	Nessus	Fedora Local Security Checks	high
253068	Fedora 42 : suricata (2025-f555a9146a)	Nessus	Fedora Local Security Checks	high
248582	Linux Distros Unpatched Vulnerability : CVE-2025-53537	Nessus	Misc.	high

Detections

Analytics

CVE-2025-53537

high

Tenable Plugins

high

high

high

high