{"id":"CVE-2025-53537","aliases":["DEBIAN-CVE-2025-53537","EUVD-2025-22472","GHSA-v3qq-h8mh-vph7","UBUNTU-CVE-2025-53537","USN-7814-1"],"status":"published","title":"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.","severity":{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"high","assessor":"cna","from":"cve"},"epss":{"day":"2026-11-10","score":0.00502,"percentile":0.43304,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":true},"cwes":["CWE-401"],"published":"2025-07-23T20:35:30Z","modified":"2026-10-28T10:35:43Z","fixes":[{"ecosystem":"Debian:13","package":"libhtp","fixed_in":["1:0.5.50-1+deb13u1"],"sources":["osv"]},{"ecosystem":"Ubuntu:Pro:16.04:LTS","package":"libhtp","fixed_in":["0.5.15-1ubuntu0.1~esm1"],"sources":["osv"]},{"ecosystem":"Ubuntu:Pro:18.04:LTS","package":"libhtp","fixed_in":["1:0.5.26-1ubuntu0.1~esm1"],"sources":["osv"]},{"ecosystem":"Ubuntu:Pro:20.04:LTS","package":"libhtp","fixed_in":["1:0.5.32-1ubuntu0.1~esm1"],"sources":["osv"]},{"ecosystem":"Ubuntu:Pro:22.04:LTS","package":"libhtp","fixed_in":["1:0.5.39-1ubuntu0.1~esm1"],"sources":["osv"]},{"ecosystem":"Ubuntu:Pro:24.04:LTS","package":"libhtp","fixed_in":["1:0.5.46-1ubuntu2+esm1"],"sources":["osv"]}],"affected":[{"source":"osv","ecosystem":"Debian:13","package":"libhtp","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1:0.5.50-1+deb13u1"}]}],"versions":["1:0.5.50-1","1:0.5.50-1+deb13u1~bpo12+1"]},{"source":"osv","ecosystem":"Ubuntu:Pro:16.04:LTS","package":"libhtp","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"0.5.15-1ubuntu0.1~esm1"}]}],"versions":["0.5.15-1"]},{"source":"osv","ecosystem":"Ubuntu:Pro:18.04:LTS","package":"libhtp","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1:0.5.26-1ubuntu0.1~esm1"}]}],"versions":["1:0.5.25-1","1:0.5.26-1"]},{"source":"osv","ecosystem":"Ubuntu:Pro:20.04:LTS","package":"libhtp","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1:0.5.32-1ubuntu0.1~esm1"}]}],"versions":["1:0.5.30-1","1:0.5.31-1","1:0.5.32-1"]},{"source":"osv","ecosystem":"Ubuntu:Pro:22.04:LTS","package":"libhtp","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1:0.5.39-1ubuntu0.1~esm1"}]}],"versions":["1:0.5.36-1","1:0.5.38-1","1:0.5.39-1"]},{"source":"osv","ecosystem":"Ubuntu:Pro:24.04:LTS","package":"libhtp","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1:0.5.46-1ubuntu2+esm1"}]}],"versions":["1:0.5.45-1","1:0.5.46-1ubuntu1","1:0.5.46-1ubuntu2"]},{"source":"osv","ecosystem":"Ubuntu:25.10","package":"libhtp","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["1:0.5.49-1","1:0.5.50-1"]},{"source":"osv","ecosystem":"Ubuntu:26.04:LTS","package":"libhtp","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["1:0.5.50-1","1:0.5.52-1","1:0.5.52-2"]},{"source":"osv","ecosystem":"Ubuntu:Pro:16.04:LTS","package":"libhtp","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"0.5.15-1ubuntu0.1~esm1"}]}],"versions":["0.5.15-1"],"bundled":4},{"source":"osv","ecosystem":"Ubuntu:Pro:18.04:LTS","package":"libhtp","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1:0.5.26-1ubuntu0.1~esm1"}]}],"versions":["1:0.5.25-1","1:0.5.26-1"],"bundled":4},{"source":"osv","ecosystem":"Ubuntu:Pro:20.04:LTS","package":"libhtp","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1:0.5.32-1ubuntu0.1~esm1"}]}],"versions":["1:0.5.30-1","1:0.5.31-1","1:0.5.32-1"],"bundled":4},{"source":"osv","ecosystem":"Ubuntu:Pro:22.04:LTS","package":"libhtp","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1:0.5.39-1ubuntu0.1~esm1"}]}],"versions":["1:0.5.36-1","1:0.5.38-1","1:0.5.39-1"],"bundled":4},{"source":"osv","ecosystem":"Ubuntu:Pro:24.04:LTS","package":"libhtp","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1:0.5.46-1ubuntu2+esm1"}]}],"versions":["1:0.5.45-1","1:0.5.46-1ubuntu1","1:0.5.46-1ubuntu2"],"bundled":4}],"products":[{"vendor":"oisf","product":"libhtp"}],"references":[{"url":"https://github.com/OISF/libhtp/security/advisories/GHSA-v3qq-h8mh-vph7","tags":["x_refsource_CONFIRM","Mitigation","Vendor Advisory","advisory","report"]},{"url":"https://github.com/OISF/libhtp/commit/9037ea35110a0d97be5cedf8d31fb4cd9a38c7a7","tags":["x_refsource_MISC","Patch","fix","report"]},{"url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2025/53xxx/CVE-2025-53537.json","tags":["advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2025-53537","tags":["advisory"]},{"url":"https://security-tracker.debian.org/tracker/CVE-2025-53537","tags":["advisory"]},{"url":"https://ubuntu.com/security/CVE-2025-53537","tags":["report"]},{"url":"https://www.cve.org/CVERecord?id=CVE-2025-53537","tags":["report"]},{"url":"https://ubuntu.com/security/notices/USN-7814-1","tags":["advisory"]},{"url":"https://ubuntu.com/security/CVE-2024-23837","tags":["report"]},{"url":"https://ubuntu.com/security/CVE-2024-28871","tags":["report"]},{"url":"https://ubuntu.com/security/CVE-2024-45797","tags":["report"]}],"sources":{"cve":[{"id":"CVE-2025-53537","title":"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.","status":"published","published":"2025-07-23T20:35:30.824Z","modified":"2025-07-23T20:48:59.864Z","cvss":[{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"high","assessor":"cna"}],"cwes":["CWE-401"],"updated_at":"2026-11-02T14:32:48.853452Z"}],"euvd":[{"id":"EUVD-2025-22472","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":"published","published":"2025-07-23T20:35:30Z","modified":"2025-07-23T20:48:59Z","cvss":[{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"high"}],"updated_at":"2026-11-02T20:32:04.806066Z"}],"nvd":[{"id":"CVE-2025-53537","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":"published","published":"2025-07-23T21:15:26.613Z","modified":"2026-06-17T09:38:24.45Z","cvss":[{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"high","assessor":"secondary"}],"cwes":["CWE-401"],"updated_at":"2026-11-02T14:11:19.382856Z"}],"osv":[{"id":"CVE-2025-53537","title":"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.","status":"published","published":"2025-07-23T20:35:30.824Z","modified":"2026-10-28T10:35:43.063047549Z","cvss":[{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"high"}],"cwes":["CWE-401"],"updated_at":"2026-11-02T15:44:50.45326Z"},{"id":"DEBIAN-CVE-2025-53537","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":"published","published":"2025-07-23T21:15:26.613Z","modified":"2026-09-18T22:00:05.065832332Z","cvss":[{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"high"}],"updated_at":"2026-11-02T15:45:47.378563Z"},{"id":"UBUNTU-CVE-2025-53537","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":"published","published":"2025-07-23T21:15:00Z","modified":"2026-05-20T16:23:35.848876399Z","cvss":[{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"high"}],"updated_at":"2026-11-02T16:55:50.31802Z"},{"id":"USN-7814-1","title":"libhtp vulnerabilities","description":"It was discovered that LibHTP did not correctly handle certain HTTP\nheaders. A remote attacker could possibly use this issue to cause a denial\nof service. This issue only affected Ubuntu 16.04 LTS, Ubuntu 18.04 LTS,\nUbuntu 20.04 LTS and Ubuntu 22.04 LTS. (CVE-2024-23837)\n\nIt was discovered that LibHTP did not correctly parse certain HTTP\nrequests. A remote attacker could possibly use this issue to cause a\ndenial of service. This issue only affected Ubuntu 20.04 LTS,\nUbuntu 22.04 LTS and Ubuntu 24.04 LTS. (CVE-2024-28871)\n\nIt was discovered that LibHTP did not correctly parse certain HTTP\nrequests. A remote attacker could possibly use this issue to cause a\ndenial of service. (CVE-2024-45797)\n\nIt was discovered that LibHTP did not correctly handle certain memory\noperations. A remote attacker could possibly use this issue to cause a\ndenial of service. This issue only affected Ubuntu 20.04 LTS,\nUbuntu 22.04 LTS, Ubuntu 24.04 LTS and Ubuntu 25.04. (CVE-2025-53537)","status":"published","published":"2025-10-09T02:15:21Z","modified":"2026-06-25T13:32:31.171355373Z","updated_at":"2026-11-02T16:58:21.91885Z"}]}}