CVE-2026-31408

In the Linux kernel, the following vulnerability has been resolved: Bluetooth: SCO: Fix use-after-free in sco_recv_frame() due to missing sock_hold sco_recv_frame() reads conn->sk under sco_conn_lock() but immediately releases the lock without holding a reference to the socket. A concurrent close() can free the socket between the lock release and the subsequent sk->sk_state access, resulting in a use-after-free. Other functions in the same file (sco_sock_timeout(), sco_conn_del()) correctly use sco_sock_hold() to safely hold a reference under the lock. Fix by using sco_sock_hold() to take a reference before releasing the lock, and adding sock_put() on all exit paths.

The following products are affected by CVE-2026-31408 vulnerability.

Here, you will find a curated list of external links that provide in-depth information to CVE-2026-31408.

URL	Resource
https://git.kernel.org/stable/c/108b81514d8f2535eb16651495cefb2250528db3
https://git.kernel.org/stable/c/45aaca995e4a7a05b272a58e7ab2fff4f611b8f1
https://git.kernel.org/stable/c/598dbba9919c5e36c54fe1709b557d64120cb94b
https://git.kernel.org/stable/c/7197462e90b8ce15caa1ae15d4bc2bb8cd21b11e
https://git.kernel.org/stable/c/b0a7da0e3f7442545f071499beb36374714bb9de
https://git.kernel.org/stable/c/d57384e27d1ebf0047e3f00a6e1181b8be9857a2
https://git.kernel.org/stable/c/e76e8f0581ef555eacc11dbb095e602fb30a5361
https://lore.kernel.org/linux-cve-announce/2026040629-CVE-2026-31408-9f0f@gregkh/T
https://nvd.nist.gov/vuln/detail/CVE-2026-31408
https://www.cve.org/CVERecord?id=CVE-2026-31408