{
  "cveId": "CVE-2025-57632",
  "url": "https://patchblox.com/security/cve/CVE-2025-57632",
  "summary": "CVE-2025-57632 is fixed in libsmb2 on 1 platform, first by DEBIAN-CVE-2025-57632, released September 25, 2025. It is not reported as exploited. Patch Radar priority: High.",
  "title": "libsmb2: libsmb2 6.2\u002B is vulnerable to Buffer Overflow",
  "description": "libsmb2 6.2\u002B is vulnerable to Buffer Overflow. When processing SMB2 chained PDUs (NextCommand), libsmb2 repeatedly calls smb2_add_iovector() to append to a fixed-size iovec array without checking the upper bound of v-\u003Eniov (SMB2_MAX_VECTORS=256). An attacker can craft responses with many chained PDUs to overflow v-\u003Eniov and perform heap out-of-bounds writes, causing memory corruption, crashes, and potentially arbitrary code execution. The SMB2_OPLOCK_BREAK path bypasses message ID validation.",
  "published": "2025-09-25T20:15:35Z",
  "severity": "high",
  "cvss": 7.5,
  "cvssVector": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
  "epss": 0.00584,
  "epssPercentile": 0.48147,
  "priority": "High",
  "priorityTier": 3,
  "exploited": false,
  "vendorExploited": false,
  "disclosed": false,
  "fixes": [
    {
      "platform": "linux",
      "product": "libsmb2",
      "release": "Debian 13.5 (trixie)",
      "fixedVersion": "6.2\u002Bdfsg-2\u002Bdeb13u1",
      "fix": "DEBIAN-CVE-2025-57632",
      "url": "https://patchblox.com/security/fix/linux/debian-cve-2025-57632",
      "released": "2025-09-25T20:15:35Z"
    },
    {
      "platform": "linux",
      "product": "libsmb2",
      "release": "Debian 14",
      "fixedVersion": "6.2\u002Bdfsg-3",
      "fix": "DEBIAN-CVE-2025-57632",
      "url": "https://patchblox.com/security/fix/linux/debian-cve-2025-57632",
      "released": "2025-09-25T20:15:35Z"
    }
  ],
  "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"
  }
}