#VU93254 Resource management error in Linux kernel - CVE-2021-47396
Published: June 25, 2024 / Updated: May 13, 2025
Vulnerability identifier: #VU93254
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-2021-47396
CWE-ID: CWE-399
Exploitation vector: Local access
Exploit availability:
No public exploit available
Vulnerable software:
Linux kernel
Linux kernel
Software vendor:
Linux Foundation
Linux Foundation
Description
The vulnerability allows a local user to perform a denial of service (DoS) attack.
The vulnerability exists due to resource management error within the mac80211_hwsim_beacon() function in drivers/net/wireless/mac80211_hwsim.c. A local user can perform a denial of service (DoS) attack.
Remediation
Install update from vendor's website.
External links
- https://git.kernel.org/stable/c/9bee85de2c8155388c09a2e1530a243ec1c96f05
- https://git.kernel.org/stable/c/2c204cf594df3b9468368dc9d0b24d482d93cda7
- https://git.kernel.org/stable/c/ed2adf69e29848d1eb9df99633dde655421c92ed
- https://git.kernel.org/stable/c/313bbd1990b6ddfdaa7da098d0c56b098a833572
- https://mirrors.edge.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.10.71
- https://mirrors.edge.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.14.10
- https://mirrors.edge.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.15
- https://mirrors.edge.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.4.151