{"id":"CVE-2026-63946","url":"https://www.cyber-defence.io/tools/cve/CVE-2026-63946","generatedAt":"2026-10-28T00:28:31.909Z","title":"In the Linux kernel, the following vulnerability has been resolved: Bluetooth: ISO: fix UAF in iso_recv_frame iso_recv_frame reads conn->sk under iso_conn_lock but releases the lock before using sk, with no reference held.","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nBluetooth: ISO: fix UAF in iso_recv_frame\n\niso_recv_frame reads conn->sk under iso_conn_lock but releases the lock\nbefore using sk, with no reference held. A concurrent iso_sock_kill()\ncan free sk in that window, causing use-after-free on sk->sk_state and\nsock_queue_rcv_skb().\n\nFix by replacing the bare pointer read with iso_sock_hold(conn), which\ncalls sock_hold() while the spinlock is held, atomically elevating the\nrefcount before the lock drops. Add a drop_put label so sock_put() is\ncalled on all exit paths where the hold succeeded.","published":"2026-07-19T16:17:13.000Z","lastModified":"2026-10-19T21:17:14.000Z","status":"Awaiting Analysis","sourceIdentifier":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","cvss":{"version":"3.1","score":8.8,"severity":"HIGH","vector":"CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H"},"cwe":["CWE-416"],"affected":[],"epss":{"score":0.00338,"percentile":0.26959,"date":"2026-10-26","history":[]},"kev":{"listed":false},"exploits":{"count":0,"verified":false,"firstPublished":null,"source":"Exploit-DB (https://gitlab.com/exploit-database/exploitdb)","entries":[]},"verdict":{"level":"high","text":"High impact if exploited, but EPSS currently rates exploitation as unlikely (0.34%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit."},"changes":[],"references":[{"url":"https://git.kernel.org/stable/c/119fb6f80c44dc1c65d604cf28e64c56bd9b6568","source":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/1a6b803b00ccdd7666506adbe01ddae1c72d1ca9","source":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/47f23a259517abbdb8032c057a1e8a6bf3734878","source":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/b04ec131325baf4ea4577d6c6e6b86cf092e3731","source":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/c318aa51830a3d2cc1229968fe521441c97356cd","source":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/c57ea90f203c8b8b41a474f19a09000d0f841436","source":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"}],"sources":{"nvd":"https://nvd.nist.gov/vuln/detail/CVE-2026-63946","epss":"https://www.first.org/epss/","kev":"https://www.cisa.gov/known-exploited-vulnerabilities-catalog","exploitdb":"https://www.exploit-db.com/"},"licence":"CC BY 4.0 — link back to the CVE Explorer if you publish the results; upstream data remains subject to its own terms."}