{
  "cveId": "CVE-2026-70368",
  "url": "https://patchblox.com/security/cve/CVE-2026-70368",
  "summary": "CVE-2026-70368 is fixed in stunnel on 1 platform, first by DEBIAN-CVE-2026-70368, released August 8, 2026. It is not reported as exploited. Patch Radar priority: Routine.",
  "title": "Stunnel: stack-based out-of-bounds read/write in stunnel s_vlog via oversized log message",
  "description": "A stack-based out-of-bounds read vulnerability exists in the \u0022s_vlog\u0022 function of stunnel, when handling oversized log messages via \u0022vsnprintf\u0022. A remote attacker with network access to a stunnel service can send protocol inputs that trigger a log message longer than 1024 bytes, leading to an out-of-bounds stack read and a potential crash. In certain corner cases, the same vulnerability could be used to replace a series of trailing \u0022\\n\u0022 characters with \u0022\\0\u0022.",
  "published": "2026-08-04T14:16:32Z",
  "severity": "Moderate",
  "cvss": 6.5,
  "cvssVector": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:L",
  "cwe": "Out-of-bounds Read",
  "epss": 0.00353,
  "epssPercentile": 0.2915,
  "priority": "Routine",
  "priorityTier": 4,
  "exploited": false,
  "vendorExploited": false,
  "disclosed": false,
  "vendorAdvisory": "https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-70368",
  "fixes": [
    {
      "platform": "linux",
      "product": "stunnel",
      "release": "Debian 14",
      "fixedVersion": "3:5.80-1",
      "fix": "DEBIAN-CVE-2026-70368",
      "url": "https://patchblox.com/security/fix/linux/debian-cve-2026-70368",
      "released": "2026-08-08T15:30:50Z"
    },
    {
      "platform": "linux",
      "product": "stunnel",
      "release": "opensuse-leap 16.0",
      "fixedVersion": "5.74-160000.3.1",
      "fix": "OPENSUSE-SU-2026:22088-1",
      "url": "https://patchblox.com/security/fix/linux/opensuse-su-2026-22088-1",
      "released": "2026-11-07T00:48:28Z"
    },
    {
      "platform": "linux",
      "product": "stunnel",
      "release": "sles 15.7",
      "fixedVersion": "5.70-150600.3.6.1",
      "fix": "SUSE-SU-2026:4617-1",
      "url": "https://patchblox.com/security/fix/linux/suse-su-2026-4617-1",
      "released": "2026-11-07T00:44:01Z"
    },
    {
      "platform": "linux",
      "product": "stunnel",
      "release": "sles 16.0",
      "fixedVersion": "5.74-160000.3.1",
      "fix": "SUSE-SU-2026:24232-1",
      "url": "https://patchblox.com/security/fix/linux/suse-su-2026-24232-1",
      "released": "2026-11-07T00:45:20Z"
    }
  ],
  "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"
  }
}