CVE-2022-49555
In the Linux kernel, the following vulnerability has been resolved: Bluetooth: hci_qca: Use del_timer_sync() before freeing While looking at a crash report on a timer list being corrupted, which usually happens when a timer is freed while still active.
Does this matter?
Lower severity and a low EPSS score (0.27%). Track it; it rarely justifies an emergency change on its own.
Description
In the Linux kernel, the following vulnerability has been resolved: Bluetooth: hci_qca: Use del_timer_sync() before freeing While looking at a crash report on a timer list being corrupted, which usually happens when a timer is freed while still active. This is commonly triggered by code calling del_timer() instead of del_timer_sync() just before freeing. One possible culprit is the hci_qca driver, which does exactly that. Eric mentioned that wake_retrans_timer could be rearmed via the work queue, so also move the destruction of the work queue before del_timer_sync().
- 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
- 0.27% probability · 19th percentile
- CISA KEV
- Not listed
- Affected
- linux/linux kernel
- Source
- 416baaa9-dc9f-4396-8d5f-8c081fb06d67
References
- https://git.kernel.org/stable/c/2717654ae022e6ea959a4b7b762702fe1a4690c2Patch
- https://git.kernel.org/stable/c/37d17f63d085d601011964ade7371aeebeb6ed4bPatch
- https://git.kernel.org/stable/c/4989bb03342941f2b730b37dfa38bce27b543661Patch
- https://git.kernel.org/stable/c/72ef98445aca568a81c2da050532500a8345ad3aPatch
- https://git.kernel.org/stable/c/db03727b4bbbbb36e6ef4cb655c670eefb6448e9Patch
Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.