CVE-2026-63946
Bluetooth: ISO: fix UAF in iso_recv_frame
CVSS Score
0.0
EPSS Score
0.0%
EPSS Percentile
0th
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.
| Vendor | linux |
| Product | linux |
| Ecosystems | |
| Industries | Technology |
| Published | Jul 19, 2026 |
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Affected Versions
Linux / Linux
ccf74f2390d60a2f9a75ef496d2564abb478f46a < c57ea90f203c8b8b41a474f19a09000d0f841436 ccf74f2390d60a2f9a75ef496d2564abb478f46a < 119fb6f80c44dc1c65d604cf28e64c56bd9b6568 ccf74f2390d60a2f9a75ef496d2564abb478f46a < b04ec131325baf4ea4577d6c6e6b86cf092e3731 ccf74f2390d60a2f9a75ef496d2564abb478f46a < c318aa51830a3d2cc1229968fe521441c97356cd ccf74f2390d60a2f9a75ef496d2564abb478f46a < 1a6b803b00ccdd7666506adbe01ddae1c72d1ca9 ccf74f2390d60a2f9a75ef496d2564abb478f46a < 47f23a259517abbdb8032c057a1e8a6bf3734878
Linux / Linux
6.0
References
git.kernel.org: https://git.kernel.org/stable/c/c57ea90f203c8b8b41a474f19a09000d0f841436 git.kernel.org: https://git.kernel.org/stable/c/119fb6f80c44dc1c65d604cf28e64c56bd9b6568 git.kernel.org: https://git.kernel.org/stable/c/b04ec131325baf4ea4577d6c6e6b86cf092e3731 git.kernel.org: https://git.kernel.org/stable/c/c318aa51830a3d2cc1229968fe521441c97356cd git.kernel.org: https://git.kernel.org/stable/c/1a6b803b00ccdd7666506adbe01ddae1c72d1ca9 git.kernel.org: https://git.kernel.org/stable/c/47f23a259517abbdb8032c057a1e8a6bf3734878