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CVE-2021-47494

MEDIUM

5.5

Description

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.

CVE Details

CVSS v3.1 Score5.5

SeverityMEDIUM

CVSS VectorCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

Attack VectorLOCAL

ComplexityLOW

Privileges RequiredLOW

User InteractionNONE

Published5/22/2024

Last Modified9/24/2025

Sourcenvd

Honeypot Sightings0

Affected Products

linux:linux_kernel

Weaknesses (CWE)

CWE-667

References

https://git.kernel.org/stable/c/09b1d5dc6ce1c9151777f6c4e128a59457704c97(416baaa9-dc9f-4396-8d5f-8c081fb06d67)

https://git.kernel.org/stable/c/3c897f39b71fe68f90599f6a45b5f7bf5618420e(416baaa9-dc9f-4396-8d5f-8c081fb06d67)

https://git.kernel.org/stable/c/4c22227e39c7a0b4dab55617ee8d34d171fab8d4(416baaa9-dc9f-4396-8d5f-8c081fb06d67)

https://git.kernel.org/stable/c/09b1d5dc6ce1c9151777f6c4e128a59457704c97(af854a3a-2127-422b-91ae-364da2661108)

https://git.kernel.org/stable/c/3c897f39b71fe68f90599f6a45b5f7bf5618420e(af854a3a-2127-422b-91ae-364da2661108)

https://git.kernel.org/stable/c/4c22227e39c7a0b4dab55617ee8d34d171fab8d4(af854a3a-2127-422b-91ae-364da2661108)

IOC Correlations

No correlations recorded

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