Bluetooth: ISO: serialize iso_sock_clear_timer with socket lock
- Published
- Last modified
- Where the record stands: published, rejected by its publisher, or superseded by another id.What do these mean? →
- published
- Whether CISA lists it in its Known Exploited Vulnerabilities catalog: proof that attackers are using it.What do these mean? →
- Not listed in CISA KEV
- Fix
- Fixed in 6.1.176, 6.6.143, 6.12.93, 6.18.35, 7.0.12
- Whether working attack code is public (Exploit-DB, Metasploit, Nuclei or GitHub). Public code makes attacks easier.What do these mean? →
- None on Exploit-DB, Metasploit or GitHub
- Exploitation: none
- Automatable: no
- Technical impact: total
Summary
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.
Timeline
- CVE published
- CISA SSVC assessment
Exploitation: none · Automatable: no · Technical impact: total
- Record last updated
Affected versions
- Linux Linux
From ccf74f2390d60a2f9a75ef496d2564abb478f46a · fixed in d9cbf7144ec589a3f0cc91f74a1a1af2d2b14afa; From ccf74f2390d60a2f9a75ef496d2564abb478f46a · fixed in 35f68f36d9883d56dec21cf85f7556d4657fc393; From ccf74f2390d60a2f9a75ef496d2564abb478f46a · fixed in 996c2104d0726a8fe584f85b3d6327197374a348; From ccf74f2390d60a2f9a75ef496d2564abb478f46a · fixed in bc08c15746f25f41dd0508b25780d1e84acbb2ef; From ccf74f2390d60a2f9a75ef496d2564abb478f46a · fixed in 51cb9dcfdf9a1bccf312ab2ae4b62db629f7dcd5; From ccf74f2390d60a2f9a75ef496d2564abb478f46a · fixed in 4b5f8e608749b7e8fa386c6e4301cf9272595859
- Linux Linux
6.0
- KernelLinux
From 6.0.0 · fixed in 6.1.176; From 6.2.0 · fixed in 6.6.143; From 6.7.0 · fixed in 6.12.93; From 6.13.0 · fixed in 6.18.35; From 6.19.0 · fixed in 7.0.12