{
  "cveId": "CVE-2025-53537",
  "url": "https://patchblox.com/security/cve/CVE-2025-53537",
  "summary": "CVE-2025-53537 is fixed in 2 products on 1 platform, first by libhtp2 1:0.5.26-1ubuntu0.1~esm1, released July 23, 2025. It is not reported as exploited. Patch Radar priority: High.",
  "title": "libhtp2: LibHTP is a security-aware parser for the HTTP protocol and its relatedbits and pieces",
  "description": "LibHTP is a security-aware parser for the HTTP protocol and its relatedbits and pieces. In versions 0.5.50 and below, there is a traffic-inducedmemory leak that can starve the process of memory, leading to loss ofvisibility. To workaround this issue, set \u0060suricata.yamlapp-layer.protocols.http.libhtp.default-config.lzma-enabled\u0060 to false. Thisissue is fixed in version 0.5.51.",
  "published": "2025-07-23T14:15:00Z",
  "severity": "Medium",
  "cvss": 7.5,
  "cvssVector": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
  "epss": 0.00502,
  "epssPercentile": 0.43215,
  "priority": "High",
  "priorityTier": 3,
  "exploited": false,
  "vendorExploited": false,
  "disclosed": false,
  "fixes": [
    {
      "platform": "linux",
      "product": "libhtp",
      "release": "Debian 13.5 (trixie)",
      "fixedVersion": "1:0.5.50-1\u002Bdeb13u1",
      "fix": "DEBIAN-CVE-2025-53537",
      "url": "https://patchblox.com/security/fix/linux/debian-cve-2025-53537",
      "released": "2025-07-23T21:15:26Z"
    },
    {
      "platform": "linux",
      "product": "libhtp2",
      "release": "Ubuntu 18.04.6 LTS (bionic)",
      "fixedVersion": "1:0.5.26-1ubuntu0.1~esm1",
      "fix": "libhtp2 1:0.5.26-1ubuntu0.1~esm1",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-bionic-libhtp2-1-0.5.26-1ubuntu0.1-esm1",
      "released": "2025-07-23T14:15:00Z"
    },
    {
      "platform": "linux",
      "product": "libhtp2",
      "release": "Ubuntu 20.04 LTS (focal)",
      "fixedVersion": "1:0.5.32-1ubuntu0.1~esm1",
      "fix": "libhtp2 1:0.5.32-1ubuntu0.1~esm1",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-focal-libhtp2-1-0.5.32-1ubuntu0.1-esm1",
      "released": "2025-07-23T14:15:00Z"
    },
    {
      "platform": "linux",
      "product": "libhtp2",
      "release": "Ubuntu 22.04.1 LTS (jammy)",
      "fixedVersion": "1:0.5.39-1ubuntu0.1~esm1",
      "fix": "libhtp2 1:0.5.39-1ubuntu0.1~esm1",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-jammy-libhtp2-1-0.5.39-1ubuntu0.1-esm1",
      "released": "2025-07-23T14:15:00Z"
    },
    {
      "platform": "linux",
      "product": "libhtp2",
      "release": "Ubuntu 24.04.5 LTS (noble)",
      "fixedVersion": "1:0.5.46-1ubuntu2\u002Besm1",
      "fix": "libhtp2 1:0.5.46-1ubuntu2\u002Besm1",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-noble-libhtp2-1-0.5.46-1ubuntu2-esm1",
      "released": "2025-07-23T14:15:00Z"
    },
    {
      "platform": "linux",
      "product": "libhtp2",
      "release": "Ubuntu 25.04 (plucky)",
      "fixedVersion": "1:0.5.49-1ubuntu0.1",
      "fix": "libhtp2 1:0.5.49-1ubuntu0.1",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-plucky-libhtp2-1-0.5.49-1ubuntu0.1",
      "released": "2026-01-16T01:42:25Z"
    }
  ],
  "noFixYet": [],
  "dataAsOf": "2026-11-08T13:06:02Z",
  "attribution": {
    "text": "Data: Patchblox Patch Radar",
    "url": "https://patchblox.com/security/patch-radar",
    "terms": "https://patchblox.com/security/patch-radar/use-the-data"
  }
}