CVE-2026-63946

Summary

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. A concurrent iso_sock_kill() can free sk in that window, causing use-after-free on sk->sk_state and sock_queue_rcv_skb().

Fix by replacing the bare pointer read with iso_sock_hold(conn), which calls sock_hold() while the spinlock is held, atomically elevating the refcount before the lock drops. Add a drop_put label so sock_put() is called on all exit paths where the hold succeeded.

Affected Software

VendorProductVersion RangeStatus
LinuxLinuxccf74f2390d60a2f9a75ef496d2564abb478f46a < c57ea90f203c8b8b41a474f19a09000d0f841436affected
LinuxLinuxccf74f2390d60a2f9a75ef496d2564abb478f46a < 119fb6f80c44dc1c65d604cf28e64c56bd9b6568affected
LinuxLinuxccf74f2390d60a2f9a75ef496d2564abb478f46a < b04ec131325baf4ea4577d6c6e6b86cf092e3731affected
LinuxLinuxccf74f2390d60a2f9a75ef496d2564abb478f46a < c318aa51830a3d2cc1229968fe521441c97356cdaffected
LinuxLinuxccf74f2390d60a2f9a75ef496d2564abb478f46a < 1a6b803b00ccdd7666506adbe01ddae1c72d1ca9affected
LinuxLinuxccf74f2390d60a2f9a75ef496d2564abb478f46a < 47f23a259517abbdb8032c057a1e8a6bf3734878affected
LinuxLinux6.0affected
LinuxLinux0 < 6.0unaffected
LinuxLinux6.1.176 <= 6.1.*unaffected
LinuxLinux6.6.143 <= 6.6.*unaffected
LinuxLinux6.12.93 <= 6.12.*unaffected
LinuxLinux6.18.35 <= 6.18.*unaffected
LinuxLinux7.0.12 <= 7.0.*unaffected
LinuxLinux7.1 <= *unaffected

Weaknesses

References