PT-2025-8239 · Linux+2 · Linux Kernel+2
Duoming Zhou
·
Published
2022-04-20
·
Updated
2025-05-20
·
CVE-2022-49305
CVSS v3.1
5.5
Medium
| Vector | AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H |
Name of the Vulnerable Software and Affected Versions
Linux kernel (affected versions not specified)
Description
A deadlock issue exists in the Linux kernel, specifically in the
ieee80211 beacons stop() function. This occurs when two threads attempt to access the ieee->beacon lock simultaneously, causing the function to block indefinitely. The deadlock is a result of the del timer sync() call waiting for a timer to stop while holding the lock, and the timer handler also requiring the same lock. The issue is resolved by extracting the del timer sync() call from the protection of spin lock irqsave(), allowing the timer handler to obtain the necessary lock.Recommendations
For the Linux kernel, apply the patch that extracts
del timer sync() from the protection of spin lock irqsave() to resolve the deadlock issue in ieee80211 beacons stop().Exploit
Fix
Improper Locking
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Related Identifiers
Affected Products
Astra Linux
Linux Kernel
Suse