{
  "cveId": "CVE-2026-90256",
  "url": "https://patchblox.com/security/cve/CVE-2026-90256",
  "summary": "CVE-2026-90256 is fixed in linux on 1 platform, first by DEBIAN-CVE-2026-90256, 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:  Bluetooth: L2CAP: use proto_lock for l2cap_data...",
  "description": "In the Linux kernel, the following vulnerability has been resolved:  Bluetooth: L2CAP: use proto_lock for l2cap_data to fix l2cap_disconn_ind  hci_conn::l2cap_data is accessed without locks in l2cap_disconn_ind via hci_conn_timeout (disc_work) -\u003E hci_proto_disconn_ind -\u003E l2cap_disconn_ind.  This is UAF if the l2cap_conn is deleted concurrently.  disc_work is disabled sync in hci_conn_del(), so we cannot take hci_dev_lock in disc_work.  Fix by using proto_lock to guard l2cap_data, in addition to hdev-\u003Elock which is held in other access paths.",
  "published": "2026-09-17T17:17:21Z",
  "severity": "high",
  "cvss": 8.8,
  "cvssVector": "CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
  "epss": 0.00318,
  "epssPercentile": 0.24943,
  "priority": "High",
  "priorityTier": 3,
  "exploited": false,
  "vendorExploited": false,
  "disclosed": false,
  "fixes": [
    {
      "platform": "linux",
      "product": "linux",
      "release": "Debian 13.5 (trixie)",
      "fixedVersion": "6.12.115-2",
      "fix": "DEBIAN-CVE-2026-90256",
      "url": "https://patchblox.com/security/fix/linux/debian-cve-2026-90256",
      "released": "2026-09-23T19:19:02Z"
    },
    {
      "platform": "linux",
      "product": "linux",
      "release": "Debian 14",
      "fixedVersion": "7.2.6-1",
      "fix": "DEBIAN-CVE-2026-90256",
      "url": "https://patchblox.com/security/fix/linux/debian-cve-2026-90256",
      "released": "2026-09-23T19:19:02Z"
    }
  ],
  "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"
  }
}