{
  "cveId": "CVE-2026-99169",
  "url": "https://patchblox.com/security/cve/CVE-2026-99169",
  "summary": "CVE-2026-99169 is fixed in linux on 1 platform, first by DEBIAN-CVE-2026-99169, released November 3, 2026. It is not reported as exploited. Patch Radar priority: Routine.",
  "title": "futex: Fix mm reuse handling for FUT_OFF_MMSHARED",
  "description": "In the Linux kernel, the following vulnerability has been resolved:  futex: Fix mm reuse handling for FUT_OFF_MMSHARED  A FUT_OFF_MMSHARED futex is a shared futex that refers to an MM. It is possible for a process to wait on a shared futex with a different MM because a FUT_OFF_INODE waiter can be requeued onto a FUT_OFF_MMSHARED futex by another process. This can cause FUT_OFF_MMSHARED waiters on a freed MM to consume wakeups intended for a newly allocated MM at the same address.  Fix it by keying FUT_OFF_MMSHARED using a unique 64-bit per-MM ID. Leave private futexes as before to avoid influencing the performance of the hotpath.  (Multi-threaded processes typically implicitly use FUT_OFF_MMSHARED by setting clear_child_tid such that it points into anonymous memory, which causes mm_release() in a multi-threaded mm to perform FUTEX_WAKE.)",
  "published": "2026-10-28T11:17:37Z",
  "severity": "Moderate",
  "cvss": 5.5,
  "epss": 0.00183,
  "epssPercentile": 0.07955,
  "priority": "Routine",
  "priorityTier": 4,
  "exploited": false,
  "vendorExploited": false,
  "disclosed": false,
  "vendorAdvisory": "https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-99169",
  "fixes": [
    {
      "platform": "linux",
      "product": "linux",
      "release": "Debian 13.5 (trixie)",
      "fixedVersion": "6.12.115-2",
      "fix": "DEBIAN-CVE-2026-99169",
      "url": "https://patchblox.com/security/fix/linux/debian-cve-2026-99169",
      "released": "2026-11-03T18:58:21Z"
    },
    {
      "platform": "linux",
      "product": "linux",
      "release": "Debian 14",
      "fixedVersion": "7.2.13-1",
      "fix": "DEBIAN-CVE-2026-99169",
      "url": "https://patchblox.com/security/fix/linux/debian-cve-2026-99169",
      "released": "2026-11-03T18:58:21Z"
    }
  ],
  "noFixYet": [],
  "dataAsOf": "2026-11-10T07:50:38Z",
  "attribution": {
    "text": "Data: Patchblox Patch Radar",
    "url": "https://patchblox.com/security/patch-radar",
    "terms": "https://patchblox.com/security/patch-radar/use-the-data"
  }
}