In the Linux kernel, the following vulnerability has been resolved:
cfg80211: fix management registrations locking
The management registrations locking was broken, the list was
locked for each wdev, but cfg80211_mgmt_registrations_update()
iterated it without holding all the correct spinlocks, causing
list corruption.
Rather than trying to fix it with fine-grained locking, just
move the lock to the wiphy/rdev (still need the list on each
wdev), we already need to hold the wdev lock to change it, so
there's no contention on the lock in any case. This trivially
fixes the bug since we hold one wdev's lock already, and now
will hold the lock that protects all lists.
References
Configurations
Configuration 1 (hide)
|
History
24 Sep 2025, 19:14
| Type | Values Removed | Values Added |
|---|---|---|
| First Time |
Linux
Linux linux Kernel |
|
| CWE | CWE-667 | |
| References | () https://git.kernel.org/stable/c/09b1d5dc6ce1c9151777f6c4e128a59457704c97 - Patch | |
| References | () https://git.kernel.org/stable/c/3c897f39b71fe68f90599f6a45b5f7bf5618420e - Patch | |
| References | () https://git.kernel.org/stable/c/4c22227e39c7a0b4dab55617ee8d34d171fab8d4 - Patch | |
| CVSS |
v2 : v3 : |
v2 : unknown
v3 : 5.5 |
| CPE | cpe:2.3:o:linux:linux_kernel:5.15:rc4:*:*:*:*:*:* cpe:2.3:o:linux:linux_kernel:5.15:rc1:*:*:*:*:*:* cpe:2.3:o:linux:linux_kernel:5.15:rc2:*:*:*:*:*:* cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* cpe:2.3:o:linux:linux_kernel:5.15:rc5:*:*:*:*:*:* cpe:2.3:o:linux:linux_kernel:5.15:rc7:*:*:*:*:*:* cpe:2.3:o:linux:linux_kernel:5.15:rc3:*:*:*:*:*:* cpe:2.3:o:linux:linux_kernel:5.15:rc6:*:*:*:*:*:* |
Information
Published : 2024-05-22 09:15
Updated : 2025-09-24 19:14
NVD link : CVE-2021-47494
Mitre link : CVE-2021-47494
CVE.ORG link : CVE-2021-47494
JSON object : View
Products Affected
linux
- linux_kernel
CWE
CWE-667
Improper Locking