{
  "cveId": "CVE-2026-74540",
  "url": "https://patchblox.com/security/cve/CVE-2026-74540",
  "summary": "CVE-2026-74540 is fixed in 52 products on 1 platform, first by DEBIAN-CVE-2026-74540, released August 16, 2026. It is not reported as exploited. Patch Radar priority: High.",
  "title": "Bluetooth: L2CAP: fix UAF in l2cap_le_connect_rsp",
  "description": "In the Linux kernel, the following vulnerability has been resolved:  Bluetooth: L2CAP: fix UAF in l2cap_le_connect_rsp  l2cap_le_connect_rsp() obtains a channel via __l2cap_get_chan_by_ident() but neither holds a reference nor uses l2cap_chan_hold_unless_zero() before locking and operating on it. A concurrent l2cap_chan_del() triggered by a remote disconnect can free the channel between the lookup and l2cap_chan_lock(), causing a use-after-free.  The BR/EDR counterpart l2cap_connect_rsp() and the sibling handler l2cap_le_command_rej() already use l2cap_chan_hold_unless_zero() to safely hold a reference, but l2cap_le_connect_rsp() was left unprotected.  Fix by adding l2cap_chan_hold_unless_zero() after the ident lookup and l2cap_chan_put() on the exit path, consistent with other L2CAP response handlers.",
  "published": "2026-08-15T13:17:59Z",
  "severity": "Moderate",
  "cvss": 8.8,
  "cvssVector": "CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
  "epss": 0.00255,
  "epssPercentile": 0.1719,
  "priority": "High",
  "priorityTier": 3,
  "exploited": false,
  "vendorExploited": false,
  "disclosed": false,
  "vendorAdvisory": "https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-74540",
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