{"apiVersion":"1.0","identifier":"CVE-2026-74534","description":"In the Linux kernel, the following vulnerability has been resolved: Bluetooth: ISO: fix refcounting of iso_conn iso_conn_del() and iso_chan_del() have a race that results to double-put of iso_conn: [Task hdev->workqueue] [Task 2] iso_conn_del iso_chan_del iso_conn_hold_unless_zero iso_conn_lock iso_conn_lock conn->sk = NULL iso_conn_unlock sk = iso_sock_hold(conn) <---------´ if (!sk) iso_conn_put iso_conn_put iso_conn_put /* UAF */ The extra put for !sk in iso_conn_del() is currently required since failing iso_chan_add() may leave iso_conn not associated with any sk. Fix by having iso_pi(sk)->conn own refcount when non-NULL, so iso_conn_del does not need to put it. Adjust the iso_conn_add() refcounting so that conn is put if it does not get associated with an sk.","publishedAt":"2026-08-15T13:17:58","lastModifiedAt":"2026-08-17T06:19:50","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-74534","cvssScore":8.8,"cvssVector":"CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","epssProbability":0.00239,"riskScore":0.9,"affectedProduct":"Linux kernel","affectedVersions":"unknown","vulnerabilityType":"Kernel","operatingSystems":[],"links":{"self":"https://www.redsauce.net/api/cves/CVE-2026-74534","webPages":{"es":"https://www.redsauce.net/es/cves/CVE-2026-74534","en":"https://www.redsauce.net/en/cves/CVE-2026-74534","fr":"https://www.redsauce.net/fr/cves/CVE-2026-74534","pt":"https://www.redsauce.net/pt/cves/CVE-2026-74534","de":"https://www.redsauce.net/de/cves/CVE-2026-74534","sk":"https://www.redsauce.net/sk/cves/CVE-2026-74534","el":"https://www.redsauce.net/el/cves/CVE-2026-74534"},"source":"https://nvd.nist.gov/vuln/detail/CVE-2026-74534"}}