SB20240608154 - Improper locking in Linux kernel net
Published: June 8, 2024 Updated: May 13, 2025
Security Bulletin ID
SB20240608154
Severity
Low
Patch available
YES
Number of vulnerabilities
1
Exploitation vector
Local access
Highest impact
Denial of service
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 1 security vulnerability.
1) Improper locking (CVE-ID: CVE-2021-47494)
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.
References
- https://git.kernel.org/stable/c/4c22227e39c7a0b4dab55617ee8d34d171fab8d4
- https://git.kernel.org/stable/c/3c897f39b71fe68f90599f6a45b5f7bf5618420e
- https://git.kernel.org/stable/c/09b1d5dc6ce1c9151777f6c4e128a59457704c97
- https://mirrors.edge.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.10.77
- https://mirrors.edge.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.14.16
- https://mirrors.edge.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.15