CVE-2022-49313: 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: drivers: usb: host: Fix deadlock in oxu_bus_suspend() There is a deadlock in oxu_bus_suspend(), which is shown below: (Thread 1) | (Thread 2) | timer_action() oxu_bus_suspend() | mod_timer() spin_lock_irq() //(1) | (wait a time) ... | oxu_watchdog() del_timer_sync() | spin_lock_irq() //(2) (wait timer to stop) | ... We hold oxu->lock in position (1) of thread 1, and use del_timer_sync() to wait timer to stop, but timer handler also need oxu->lock in position (2) of thread 2. As a result, oxu_bus_suspend() will block forever. This patch extracts del_timer_sync() from the protection of spin_lock_irq(), which could let timer handler to obtain the needed lock.

Affected products

• Linux Linux Kernel: before 4.9.318 (fixed in 4.9.318); from 4.10, before 4.14.283 (fixed in 4.14.283); from 4.15, before 4.19.247 (fixed in 4.19.247); from 4.20, before 5.4.198 (fixed in 5.4.198); from 5.5, before 5.10.122 (fixed in 5.10.122); from 5.11, before 5.15.47 (fixed in 5.15.47); …

Published 2025-02-26. Last modified 2026-06-17.