vulnerability
Red Hat: CVE-2022-50374: kernel: Bluetooth: hci_{ldisc,serdev}: check percpu_init_rwsem() failure (Multiple Advisories)
| Severity | CVSS | Published | Added | Modified |
|---|---|---|---|---|
| 5 | (AV:L/AC:L/Au:S/C:N/I:N/A:C) | Sep 17, 2025 | Nov 14, 2025 | Dec 12, 2025 |
Severity
5
CVSS
(AV:L/AC:L/Au:S/C:N/I:N/A:C)
Published
Sep 17, 2025
Added
Nov 14, 2025
Modified
Dec 12, 2025
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().
Solutions
redhat-upgrade-kernelredhat-upgrade-kernel-rt
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