#VU91442 Improper locking in Linux kernel - CVE-2021-47494 

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Main Vulnerability Database Vulnerabilities #VU91442

#VU91442 Improper locking in Linux kernel - CVE-2021-47494

Published: June 8, 2024 / Updated: May 13, 2025


Vulnerability identifier: #VU91442
Vulnerability risk: Low
CVSSv4.0: CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear
CVE-ID: CVE-2021-47494
CWE-ID: CWE-667
Exploitation vector: Local access
Exploit availability: No public exploit available
Vulnerable software:
Linux kernel
Software vendor:
Linux Foundation

Description

The vulnerability allows a local user to perform a denial of service (DoS) attack.

The vulnerability exists due to improper locking within the cfg80211_mgmt_registrations_update(), cfg80211_mlme_register_mgmt(), cfg80211_mlme_unregister_socket() and cfg80211_rx_mgmt_khz() functions in net/wireless/mlme.c, within the INIT_WORK() and cfg80211_init_wdev() functions in net/wireless/core.c. A local user can perform a denial of service (DoS) attack.


Remediation

Install update from vendor's website.

External links