{
  "cveId": "CVE-2026-89639",
  "url": "https://patchblox.com/security/cve/CVE-2026-89639",
  "summary": "CVE-2026-89639 is fixed in linux on 1 platform by DEBIAN-CVE-2026-89639 (version 7.2.6-1), released September 23, 2026. It is not reported as exploited. Patch Radar priority: High.",
  "title": "linux: In the Linux kernel, the following vulnerability has been resolved:  cifs: use cifs_invalidate_cache() in cifs_do_tru...",
  "description": "In the Linux kernel, the following vulnerability has been resolved:  cifs: use cifs_invalidate_cache() in cifs_do_truncate() for O_TRUNC  cifs_do_truncate() is invoked from cifs_open() without i_rwsem, so it cannot use cifs_resize_file_locked() to perform a proper fscache cookie resize.  Instead, add cifs_invalidate_cache() after cifs_setsize().  cifs_invalidate_cache() calls fscache_invalidate(), which works without holding i_rwsem: it unconditionally increments inval_counter and sets FSCACHE_COOKIE_NO_DATA_TO_READ, ensuring that stale cached data is not served once the cookie is later activated by fscache_use_cookie(). Truncation to zero leaves no valid cached data, making invalidation the correct semantic here.",
  "published": "2026-09-11T20:19:49Z",
  "severity": "high",
  "cvss": 7.1,
  "cvssVector": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N",
  "epss": 0.00125,
  "epssPercentile": 0.0219,
  "priority": "High",
  "priorityTier": 3,
  "exploited": false,
  "vendorExploited": false,
  "disclosed": false,
  "fixes": [
    {
      "platform": "linux",
      "product": "linux",
      "release": "Debian 14",
      "fixedVersion": "7.2.6-1",
      "fix": "DEBIAN-CVE-2026-89639",
      "url": "https://patchblox.com/security/fix/linux/debian-cve-2026-89639",
      "released": "2026-09-23T19:19:02Z"
    }
  ],
  "noFixYet": [],
  "dataAsOf": "2026-11-08T06:59:42Z",
  "attribution": {
    "text": "Data: Patchblox Patch Radar",
    "url": "https://patchblox.com/security/patch-radar",
    "terms": "https://patchblox.com/security/patch-radar/use-the-data"
  }
}