Input validation error in Linux kernel - CVE-2021-47134
Published: July 2, 2024 / Updated: May 13, 2025
Vulnerability identifier: #VU93693
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-2021-47134
CWE-ID: CWE-20
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 input validation within the efi_get_fdt_params() function in drivers/firmware/efi/fdtparams.c. A local user can perform a denial of service (DoS) attack.
Affected software
Linux kernel
How to mitigate CVE-2021-47134
Install update from vendor's website.
Linux kernel - addressed in versions 5.10.43, 5.12.10, 5.13
External References
- https://git.kernel.org/stable/c/5148066edbdc89c6fe5bc419c31a5c22e5f83bdb
- https://git.kernel.org/stable/c/8a7e8b4e5631a03ea2fee27957857a56612108ca
- https://git.kernel.org/stable/c/668a84c1bfb2b3fd5a10847825a854d63fac7baa
- https://mirrors.edge.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.10.43
- https://mirrors.edge.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.12.10
- https://mirrors.edge.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.13