{
  "cveId": "CVE-2025-40291",
  "url": "https://patchblox.com/security/cve/CVE-2025-40291",
  "summary": "CVE-2025-40291 is fixed in linux on 1 platform by DEBIAN-CVE-2025-40291 (version 6.17.8-1), released December 8, 2025. It is not reported as exploited. Patch Radar priority: High.",
  "title": "linux: In the Linux kernel, the following vulnerability has been resolved:  io_uring: fix regbuf vector size truncation  The...",
  "description": "In the Linux kernel, the following vulnerability has been resolved:  io_uring: fix regbuf vector size truncation  There is a report of io_estimate_bvec_size() truncating the calculated number of segments that leads to corruption issues. Check it doesn\u0027t overflow \u0022int\u0022s used later. Rough but simple, can be improved on top.",
  "published": "2025-12-08T01:16:01Z",
  "severity": "high",
  "cvss": 7.8,
  "cvssVector": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
  "epss": 0.00144,
  "epssPercentile": 0.03731,
  "priority": "High",
  "priorityTier": 3,
  "exploited": false,
  "vendorExploited": false,
  "disclosed": false,
  "fixes": [
    {
      "platform": "linux",
      "product": "linux",
      "release": "Debian 14",
      "fixedVersion": "6.17.8-1",
      "fix": "DEBIAN-CVE-2025-40291",
      "url": "https://patchblox.com/security/fix/linux/debian-cve-2025-40291",
      "released": "2025-12-08T01:16:01Z"
    }
  ],
  "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"
  }
}