Description
In the Linux kernel, the following vulnerability has been resolved:
Bluetooth: hci_{ldisc,serdev}: check percpu_init_rwsem() failure
syzbot is reporting NULL pointer dereference at hci_uart_tty_close() [1], for rcu_sync_enter() is called without rcu_sync_init() due to hci_uart_tty_open() ignoring percpu_init_rwsem() failure.
While we are at it, fix that hci_uart_register_device() ignores percpu_init_rwsem() failure and hci_uart_unregister_device() does not call percpu_free_rwsem().
Metrics
CVSS 3.1 5.5/10
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:HWeakness enumeration
Affected software
| Vendor | Product | Versions |
|---|---|---|
| Linux | Linux | >= 67d2f8781b9f00d1089aafcfa3dc09fcd0f343e2, < d7cc0d51ffcbfd1caaa809fcf9cff05c46d0fb4d; >= 67d2f8781b9f00d1089aafcfa3dc09fcd0f343e2, < b8917dce2134739b39bc0a5648b18427f2cad569; >= 67d2f8781b9f00d1089aafcfa3dc09fcd0f343e2, < 75b2c71ea581c7bb1303860d89366a42ad0506d2; >= 67d2f8781b9f00d1089aafcfa3dc09fcd0f343e2, < 98ce10f3f345e61fc6c83bff9cd11cda252b05ac; >= 67d2f8781b9f00d1089aafcfa3dc09fcd0f343e2, < 3124d320c22f3f4388d9ac5c8f37eaad0cefd6b1; f6ec33f6bd3723a8146768106434ef6ab3d9d990; 4a53c4e84ace1bc75157a7281af3fe8f5b19d08c; >= 4.14.63, < 4.15 |
| Linux | Linux | 4.15 |
References
- https://git.kernel.org/stable/c/3124d320c22f3f4388d9ac5c8f37eaad0cefd6b1Patch
- https://git.kernel.org/stable/c/75b2c71ea581c7bb1303860d89366a42ad0506d2Patch
- https://git.kernel.org/stable/c/98ce10f3f345e61fc6c83bff9cd11cda252b05acPatch
- https://git.kernel.org/stable/c/b8917dce2134739b39bc0a5648b18427f2cad569Patch
- https://git.kernel.org/stable/c/d7cc0d51ffcbfd1caaa809fcf9cff05c46d0fb4dPatch
Timeline
- Published
- Sep 17, 2025
- Last modified
- Jun 17, 2026
- NVD status
- Modified