{
  "cveId": "CVE-2026-98279",
  "url": "https://patchblox.com/security/cve/CVE-2026-98279",
  "summary": "CVE-2026-98279 is fixed in linux on 1 platform by DEBIAN-CVE-2026-98279 (version 7.2.8-1), released October 6, 2026. It is not reported as exploited. Patch Radar priority: Urgent.",
  "title": "btrfs: handle lack of space when cleaning up verity items",
  "description": "In the Linux kernel, the following vulnerability has been resolved:  btrfs: handle lack of space when cleaning up verity items  When enable_verity() hits the qgroup limit, rollback_verity() needs its own metadata reservation. When the qgroup limit or lack of space refuses the rollback, the whole filesystem is forced read-only even though the qgroup limit was for one subvolume only. Also orphan cleanup at the next mount fails the same way, so the leftover items are never removed: with -EDQUOT the subvolume stays unreachable, and with -ENOSPC on a full filesystem the next read-write mount fails.  Start transactions with btrfs_start_transaction_fallback_global_rsv() in btrfs_orphan_cleanup(), drop_verity_items() and rollback_verity(). Those calls only delete items and free the space in the end, so they may use the global reserve and skip the qgroup limit, which avoids -ENOSPC and -EDQUOT.",
  "published": "2026-10-06T09:18:17Z",
  "severity": "Critical",
  "cvss": 9.8,
  "epss": 0.00166,
  "epssPercentile": 0.05858,
  "priority": "Urgent",
  "priorityTier": 2,
  "exploited": false,
  "vendorExploited": false,
  "disclosed": false,
  "vendorAdvisory": "https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-98279",
  "fixes": [
    {
      "platform": "linux",
      "product": "linux",
      "release": "Debian 14",
      "fixedVersion": "7.2.8-1",
      "fix": "DEBIAN-CVE-2026-98279",
      "url": "https://patchblox.com/security/fix/linux/debian-cve-2026-98279",
      "released": "2026-10-06T21:56:27Z"
    }
  ],
  "noFixYet": [],
  "dataAsOf": "2026-11-09T01:18:40Z",
  "attribution": {
    "text": "Data: Patchblox Patch Radar",
    "url": "https://patchblox.com/security/patch-radar",
    "terms": "https://patchblox.com/security/patch-radar/use-the-data"
  }
}