{"apiVersion":"1.0","identifier":"CVE-2026-74540","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.","publishedAt":"2026-08-15T13:17:59","lastModifiedAt":"2026-08-19T17:21:09","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-74540","cvssScore":8.8,"cvssVector":"CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","epssProbability":0.00255,"riskScore":0.9,"affectedProduct":"Linux kernel","affectedVersions":"unknown","vulnerabilityType":"Kernel","operatingSystems":[],"links":{"self":"https://www.redsauce.net/api/cves/CVE-2026-74540","webPages":{"es":"https://www.redsauce.net/es/cves/CVE-2026-74540","en":"https://www.redsauce.net/en/cves/CVE-2026-74540","fr":"https://www.redsauce.net/fr/cves/CVE-2026-74540","pt":"https://www.redsauce.net/pt/cves/CVE-2026-74540","de":"https://www.redsauce.net/de/cves/CVE-2026-74540","sk":"https://www.redsauce.net/sk/cves/CVE-2026-74540","el":"https://www.redsauce.net/el/cves/CVE-2026-74540"},"source":"https://nvd.nist.gov/vuln/detail/CVE-2026-74540"}}