Improper locking in Linux kernel - CVE-2021-47067
Published: June 8, 2024 / Updated: May 13, 2025
Vulnerability identifier: #VU91542
CSH Severity: Low
CVSS v4: 6.8 [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]
CVE-ID: CVE-2021-47067
CWE-ID: CWE-667
Exploitation vector: Local access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a local user to perform a denial of service (DoS) attack.
The vulnerability exists due to improper locking within the tegra30_voltage_update() function in drivers/soc/tegra/regulators-tegra30.c. A local user can perform a denial of service (DoS) attack.
Affected software
Linux kernel
How to mitigate CVE-2021-47067
Install update from vendor's website.
Linux kernel - addressed in versions 5.10.37, 5.11.21, 5.12.4, 5.13
External References
- https://git.kernel.org/stable/c/a1ad124c836816fac8bd5e461d36eaf33cee4e24
- https://git.kernel.org/stable/c/dc4452867200fa94589b382740952b58aa1c3e6c
- https://git.kernel.org/stable/c/ff39adf5d31c72025bba799aec69c5c86d81d549
- https://git.kernel.org/stable/c/ef85bb582c41524e9e68dfdbde48e519dac4ab3d
- https://mirrors.edge.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.10.37
- https://mirrors.edge.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.11.21
- https://mirrors.edge.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.12.4
- https://mirrors.edge.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.13