cbcvebase.
CVE-2021-47494
published 2024-05-22

CVE-2021-47494: In the Linux kernel, the following vulnerability has been resolved: cfg80211: fix management registrations locking The management registrations locking was…

PriorityP419medium5.5CVSS 3.1
AVLACLPRLUINSUCNINAH
EPSS
0.17%
6.5th percentile
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.

Affected

18 ranges
VendorProductVersion rangeFixed in
debianlinux< linux 5.15.3-1 (bookworm)linux 5.15.3-1 (bookworm)
linuxlinux——
linuxlinux>= 6cd536fe62ef58d7c4eac2da07ab0ed7fd19010d < 4c22227e39c7a0b4dab55617ee8d34d171fab8d44c22227e39c7a0b4dab55617ee8d34d171fab8d4
linuxlinux>= 6cd536fe62ef58d7c4eac2da07ab0ed7fd19010d < 3c897f39b71fe68f90599f6a45b5f7bf5618420e3c897f39b71fe68f90599f6a45b5f7bf5618420e
linuxlinux>= 6cd536fe62ef58d7c4eac2da07ab0ed7fd19010d < 09b1d5dc6ce1c9151777f6c4e128a59457704c9709b1d5dc6ce1c9151777f6c4e128a59457704c97
linuxlinux_kernel——
linuxlinux_kernel——
linuxlinux_kernel——
linuxlinux_kernel——
linuxlinux_kernel——
linuxlinux_kernel——
linuxlinux_kernel——
linuxlinux_kernel>= 0 < 5.10.84-15.10.84-1
linuxlinux_kernel>= 0 < 5.15.3-15.15.3-1
linuxlinux_kernel>= 0 < 5.15.3-15.15.3-1
linuxlinux_kernel>= 0 < 5.15.3-15.15.3-1
linuxlinux_kernel>= 5.11 < 5.14.165.14.16
linuxlinux_kernel>= 5.8 < 5.10.775.10.77

CVSS provenance

nvdv3.15.5MEDIUMCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
osv5.5MEDIUM
vendor_debian5.5MEDIUM
vendor_redhat5.5MEDIUM
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