CVE-2022-49313
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() |…
Does this matter?
Lower severity and a low EPSS score (0.21%). Track it; it rarely justifies an emergency change on its own.
Description
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.
- CVSS 3.1
- 5.5 MEDIUMCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
- EPSS
- 0.21% probability · 11th percentile
- CISA KEV
- Not listed
- Weakness
- CWE-667
- Affected
- linux/linux kernel
- Source
- 416baaa9-dc9f-4396-8d5f-8c081fb06d67
References
- https://git.kernel.org/stable/c/2dcec0bc142be2096af71a5703d63237127db204Patch
- https://git.kernel.org/stable/c/4187b291a76664a3c03d3f0d9bfadc8322881868Patch
- https://git.kernel.org/stable/c/4d378f2ae58138d4c55684e1d274e7dd94aa6524Patch
- https://git.kernel.org/stable/c/9b58d255f27b0ed6a2e43208960864d67579db58Patch
- https://git.kernel.org/stable/c/a3d380188bde8900c3f604e82b56572896499124Patch
- https://git.kernel.org/stable/c/b97aae8b43b718314012e8170b7e03dbfd2e7677Patch
- https://git.kernel.org/stable/c/d888753872190abd18f68a7d77b9c7c367f0a7abPatch
- https://git.kernel.org/stable/c/f8242044c91cafbba9e320b0fb31abf2429a3221Patch
- https://git.kernel.org/stable/c/ffe9440d698274c6462d2e304562c6ddfc8c84dfPatch
Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.