Improper locking in Linux kernel - CVE-2021-46971
Published: June 13, 2024 / Updated: May 13, 2025
Vulnerability identifier: #VU92050
CSH Severity: 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-2021-46971
CWE-ID: CWE-667
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 improper locking within the SYSCALL_DEFINE5() function in kernel/events/core.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/b246759284d6a2bc5b6f1009caeeb3abce2ec9ff
- https://git.kernel.org/stable/c/4348d3b5027bc3ff6336368b6c60605d4ef8e1ce
- https://git.kernel.org/stable/c/f5809ca4c311b71bfaba6d13f4e39eab0557895e
- https://git.kernel.org/stable/c/c7b0208ee370b89d20486fae71cd9abb759819c1
- https://git.kernel.org/stable/c/08ef1af4de5fe7de9c6d69f1e22e51b66e385d9b
- https://mirrors.edge.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.10.35
- https://mirrors.edge.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.11.19
- https://mirrors.edge.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.12.2
- https://mirrors.edge.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.13
- https://mirrors.edge.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.4.117