{
  "cveId": "CVE-2026-98995",
  "url": "https://patchblox.com/security/cve/CVE-2026-98995",
  "summary": "CVE-2026-98995 is fixed in linux on 1 platform by DEBIAN-CVE-2026-98995 (version 7.2.11-1), released October 24, 2026. It is not reported as exploited. Patch Radar priority: High.",
  "title": "linux: In the Linux kernel, the following vulnerability has been resolved:  namespace: reset the old parent\u0027s -\u003Eovermount in...",
  "description": "In the Linux kernel, the following vulnerability has been resolved:  namespace: reset the old parent\u0027s -\u003Eovermount in mnt_change_mountpoint()  __umount_mnt() resets -\u003Eovermount of the parent when it unmounts the mount that overmounts it. mnt_change_mountpoint() doesn\u0027t. It moves the mount to its new parent and leaves the old one pointing at it.  For a mount that is moved beneath in attach_recursive_mnt() that doesn\u0027t matter. The new mount has already reset -\u003Eovermount of the old parent by the time the old top mount is moved onto it.  It matters for reparent() though. propagate_umount() moves a surviving overmount onto the first ancestor that isn\u0027t going to be unmounted. The mount it was taken from is unmounted immediately afterwards. If a file descriptor keeps that unmounted mount alive -\u003Eovermount points at the moved mount. That\u0027s a dangling pointer and UAF as the moved mount is unmounted and freed.  do_lock_mount() follows -\u003Eovermount from the target path under mount_lock. With a file descriptor on such a mount as the target of a mount beneath topmost_overmount() walks into the freed mount and do_lock_mount() takes references on whatever it finds there.  So reset -\u003Eovermount of the old parent in mnt_change_mountpoint() the same way __umount_mnt() does. A mount\u0027s -\u003Eovermount is then always a mount that is attached to it.",
  "published": "2026-10-23T13:17:21Z",
  "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": 0.00161,
  "epssPercentile": 0.05338,
  "priority": "High",
  "priorityTier": 3,
  "exploited": false,
  "vendorExploited": false,
  "disclosed": false,
  "fixes": [
    {
      "platform": "linux",
      "product": "linux",
      "release": "Debian 14",
      "fixedVersion": "7.2.11-1",
      "fix": "DEBIAN-CVE-2026-98995",
      "url": "https://patchblox.com/security/fix/linux/debian-cve-2026-98995",
      "released": "2026-10-24T13:25:57Z"
    }
  ],
  "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"
  }
}