{"apiVersion":"1.0","identifier":"CVE-2026-74533","description":"In the Linux kernel, the following vulnerability has been resolved: Bluetooth: ISO: fix race of kfree vs kref_get_unless_zero hci_conn::iso_data is accessed and modified without lock or RCU. This leads to a race [Task hdev->workqueue] [Task 2] iso_recv iso_conn_put(conn) conn = LOAD hcon->iso_data iso_conn_free(conn) iso_conn_hold_unless_zero(conn) hcon->iso_data = NULL kfree(conn) kref_get_unless_zero(&conn->ref) /* UAF */ and also to races in iso_conn_add() vs. iso_conn_free(). Fix by adding spinlock hci_conn::proto_lock and using it to guard hci_conn::iso_data.","publishedAt":"2026-08-15T13:17:58","lastModifiedAt":"2026-08-17T06:19:50","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-74533","cvssScore":8.8,"cvssVector":"CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","epssProbability":0.00218,"riskScore":0.9,"affectedProduct":"Linux kernel","affectedVersions":"unknown","vulnerabilityType":"Kernel","operatingSystems":[],"links":{"self":"https://www.redsauce.net/api/cves/CVE-2026-74533","webPages":{"es":"https://www.redsauce.net/es/cves/CVE-2026-74533","en":"https://www.redsauce.net/en/cves/CVE-2026-74533","fr":"https://www.redsauce.net/fr/cves/CVE-2026-74533","pt":"https://www.redsauce.net/pt/cves/CVE-2026-74533","de":"https://www.redsauce.net/de/cves/CVE-2026-74533","sk":"https://www.redsauce.net/sk/cves/CVE-2026-74533","el":"https://www.redsauce.net/el/cves/CVE-2026-74533"},"source":"https://nvd.nist.gov/vuln/detail/CVE-2026-74533"}}