CVE-2021-47494 - Vulnerability Details - OpenCVE

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.

No CVSS v4.0

Attack Vector Local

Attack Complexity Low

Privileges Required Low

Scope Unchanged

Confidentiality Impact None

Integrity Impact Low

Availability Impact High

User Interaction None

No CVSS v3.0

No CVSS v2

This CVE is not in the KEV list.

The EPSS score is 0.0005.

Exploitation none

Automatable no

Technical Impact partial

Vendors	Products
Linux	Linux Kernel

No data.

No data.

OpenCVE Enrichment is a feature of OpenCVE that uses AI to automatically link vendors and products to CVEs. Learn more on GitHub.

Vendors	Products
Linux	Linux Kernel

References

Link	Providers
https://git.kernel.org/stable/c/09b1d5dc6ce1c9151777f6c4e128a59457704c97
https://git.kernel.org/stable/c/3c897f39b71fe68f90599f6a45b5f7bf5618420e
https://git.kernel.org/stable/c/4c22227e39c7a0b4dab55617ee8d34d171fab8d4
https://lore.kernel.org/linux-cve-announce/2024052241-CVE-2021-47494-d0d7@gregkh/T
https://nvd.nist.gov/vuln/detail/CVE-2021-47494
https://www.cve.org/CVERecord?id=CVE-2021-47494

History

Mon, 04 Nov 2024 12:15:00 +0000

Type	Values Removed	Values Added
Metrics		ssvc `{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}`

MITRE

Status: PUBLISHED

Assigner: Linux

Published: 2024-05-22T08:19:42.083Z

Updated: 2025-05-04T07:12:15.133Z

Reserved: 2024-05-22T06:20:56.201Z

Link: CVE-2021-47494

Vulnrichment

Updated: 2024-08-04T05:39:59.605Z

NVD

Status : Awaiting Analysis

Published: 2024-05-22T09:15:11.270

Modified: 2024-11-21T06:36:19.770

Link: CVE-2021-47494

Redhat

Severity : Moderate

Publid Date: 2024-05-22T00:00:00Z

Links: CVE-2021-47494 - Bugzilla

OpenCVE Enrichment

Updated: 2025-07-12T22:44:57Z

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