#VU93389 Improper locking in Linux kernel - CVE-2021-46970
Published: June 26, 2024 / Updated: May 13, 2025
Vulnerability identifier: #VU93389
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-2021-46970
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 mhi_register_controller() function in drivers/bus/mhi/core/init.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/abd1510c08a13c88d24b622a83c82e87ff1d3135
- https://git.kernel.org/stable/c/ed541cff35cbdb695f0c98ef506dd7218883fc07
- https://git.kernel.org/stable/c/0fccbf0a3b690b162f53b13ed8bc442ea33437dc
- https://mirrors.edge.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.11.20
- https://mirrors.edge.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.12.3
- https://mirrors.edge.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.13