Description (CNA)
In the Linux kernel, the following vulnerability has been resolved: Bluetooth: ISO: serialize iso_sock_clear_timer with socket lock iso_sock_close() calls iso_sock_clear_timer() before acquiring lock_sock(sk). iso_sock_clear_timer() reads iso_pi(sk)->conn twice without the socket lock held: if (!iso_pi(sk)->conn) return; cancel_delayed_work(&iso_pi(sk)->conn->timeout_work); Concurrently, iso_conn_del() executes under lock_sock(sk) and calls iso_chan_del(), which sets iso_pi(sk)->conn to NULL and may result in the final reference to the connection being dropped: CPU0 CPU1 ---- ---- iso_sock_clear_timer() if (conn != NULL) ... lock_sock(sk) iso_chan_del() iso_pi(sk)->conn = NULL cancel_delayed_work(conn) /* NULL deref or UAF */ iso_pi(sk)->conn is not stable across the unlock window, causing a NULL pointer dereference or use-after-free. Serialize iso_sock_clear_timer() with the socket lock by moving it inside lock_sock()/release_sock(), matching the pattern used in iso_conn_del() and all other call sites.
Affected (CNA)
| Vendor / product | Versions |
|---|---|
| Linux / Linux | affected ccf74f2390d60a2f9a75ef496d2564abb478f46a before d9cbf7144ec589a3f0cc91f74a1a1af2d2b14afa; affected ccf74f2390d60a2f9a75ef496d2564abb478f46a before 35f68f36d9883d56dec21cf85f7556d4657fc393; affected ccf74f2390d60a2f9a75ef496d2564abb478f46a before 996c2104d0726a8fe584f85b3d6327197374a348; affected ccf74f2390d60a2f9a75ef496d2564abb478f46a before bc08c15746f25f41dd0508b25780d1e84acbb2ef; affected ccf74f2390d60a2f9a75ef496d2564abb478f46a before 51cb9dcfdf9a1bccf312ab2ae4b62db629f7dcd5; affected ccf74f2390d60a2f9a75ef496d2564abb478f46a before 4b5f8e608749b7e8fa386c6e4301cf9272595859 |
| Linux / Linux | affected 6.0; unaffected 0 before 6.0; unaffected 6.1.176 through 6.1.*; unaffected 6.6.143 through 6.6.*; unaffected 6.12.93 through 6.12.*; unaffected 6.18.35 through 6.18.*; unaffected 7.0.12 through 7.0.*; unaffected 7.1 through * |
CWE
No CWE identifiers supplied.
References
- https://git.kernel.org/stable/c/d9cbf7144ec589a3f0cc91f74a1a1af2d2b14afa
- https://git.kernel.org/stable/c/35f68f36d9883d56dec21cf85f7556d4657fc393
- https://git.kernel.org/stable/c/996c2104d0726a8fe584f85b3d6327197374a348
- https://git.kernel.org/stable/c/bc08c15746f25f41dd0508b25780d1e84acbb2ef
- https://git.kernel.org/stable/c/51cb9dcfdf9a1bccf312ab2ae4b62db629f7dcd5
- https://git.kernel.org/stable/c/4b5f8e608749b7e8fa386c6e4301cf9272595859
ADP enrichment
No English description supplied.
No references supplied.