#VU106647 Out-of-bounds read in Linux kernel - CVE-2025-21991
Published: April 2, 2025 / Updated: May 11, 2025
Vulnerability identifier: #VU106647
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-2025-21991
CWE-ID: CWE-125
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 an out-of-bounds read error within the load_microcode_amd() function in arch/x86/kernel/cpu/microcode/amd.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/488ffc0cac38f203979f83634236ee53251ce593
- https://git.kernel.org/stable/c/5ac295dfccb5b015493f86694fa13a0dde4d3665
- https://git.kernel.org/stable/c/e3e89178a9f4a80092578af3ff3c8478f9187d59
- https://git.kernel.org/stable/c/e686349cc19e800dac8971929089ba5ff59abfb0
- https://git.kernel.org/stable/c/ec52240622c4d218d0240079b7c1d3ec2328a9f4
- https://mirrors.edge.kernel.org/pub/linux/kernel/v6.x/ChangeLog-6.1.132