Input validation error in Linux kernel - CVE-2021-47430
Published: June 3, 2024 / Updated: May 14, 2025
Vulnerability identifier: #VU90856
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-2021-47430
CWE-ID: CWE-20
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 input validation within the setup_smap() function in arch/x86/kernel/cpu/common.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/f2447f6587b8ffe42ba04d14ce67d429a1163e5e
- https://git.kernel.org/stable/c/4e9ec1c65da98c293f75d83755dfa5e03075a6d0
- https://git.kernel.org/stable/c/3958b9c34c2729597e182cc606cc43942fd19f7c
- https://mirrors.edge.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.10.73
- https://mirrors.edge.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.14.12
- https://mirrors.edge.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.15