CVE-2022-50374: Linux Kernel

Medium severity, CVSS 5.5. EPSS: 0.2% chance of exploitation in the next 30 days.

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().

Affected products

• Linux Linux Kernel: from 4.14.63, before 4.15 (fixed in 4.15); from 4.14.63, before 5.10.150 (fixed in 5.10.150); from 5.11, before 5.15.75 (fixed in 5.15.75); from 5.16, before 5.19.17 (fixed in 5.19.17); from 6.0, before 6.0.3 (fixed in 6.0.3)

Published 2025-09-17. Last modified 2026-06-17.