CVE-2026-89774
Description
In the Linux kernel, the following vulnerability has been resolved: Bluetooth: SCO: hold sk properly in sco_conn_ready sk deref in sco_conn_ready must be done either under conn->lock, or holding a refcount, to avoid concurrent close. conn->sk and parent sk is currently accessed without either, and without checking parent->sk_state: [Task 1] [Task 2] sco_sock_release sco_conn_ready sk = conn->sk lock_sock(sk) conn->sk = NULL lock_sock(sk) release_sock(sk) sco_sock_kill(sk) UAF on sk deref and similarly for access to sco_get_sock_listen() return value. Fix possible UAF by holding sk refcount in sco_conn_ready() and making sco_get_sock_listen() increase refcount. Also recheck after lock_sock that the socket is still valid. Adjust conn->sk locking so it's protected also by lock_sock() of the associated socket if any.
How to fix
- Linux Linux50aae396dc30377bec8e3b181b8346f8fd38f7d8, 6e3840578aaad1a296aab1eaaa89ea3b7d5cbae1, d141d9b769bcd1b747898528c5023270cda040f2, 73cb063f5ec6ca51eb1e246c6d332563002ac277, 7199c78c3a3e399a4dc439d845826793880ccedc, 4e37f6452d586b95c346a9abdd2fb80b67794f39 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| Linux Linux | 27c24fda62b601d6f9ca5e992502578c4310876f ≤ v < 50aae396dc30377bec8e3b181b8346f8fd38f7d8, 27c24fda62b601d6f9ca5e992502578c4310876f ≤ v < 6e3840578aaad1a296aab1eaaa89ea3b7d5cbae1, 27c24fda62b601d6f9ca5e992502578c4310876f ≤ v < d141d9b769bcd1b747898528c5023270cda040f2, 27c24fda62b601d6f9ca5e992502578c4310876f ≤ v < 73cb063f5ec6ca51eb1e246c6d332563002ac277, 27c24fda62b601d6f9ca5e992502578c4310876f ≤ v < 7199c78c3a3e399a4dc439d845826793880ccedc, 27c24fda62b601d6f9ca5e992502578c4310876f ≤ v < 4e37f6452d586b95c346a9abdd2fb80b67794f39, 5.15 | 50aae396dc30377bec8e3b181b8346f8fd38f7d8, 6e3840578aaad1a296aab1eaaa89ea3b7d5cbae1, d141d9b769bcd1b747898528c5023270cda040f2, 73cb063f5ec6ca51eb1e246c6d332563002ac277, 7199c78c3a3e399a4dc439d845826793880ccedc, 4e37f6452d586b95c346a9abdd2fb80b67794f39 |
Check your version
Choose the product and enter the version you run to see whether it falls in the affected range.
Attack Surface Management
See the assets tied to your domains, the technologies they run and known vulnerabilities in one list.