Improper locking in Linux kernel - CVE-2021-47454
Published: June 13, 2024 / Updated: May 13, 2025
Vulnerability identifier: #VU92013
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-2021-47454
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 __cpu_die() function in arch/powerpc/kernel/smp.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/53770a411559cf7bc0906d1df319cc533d2f4f58
- https://git.kernel.org/stable/c/3ea0b497a7a2fff6a4b7090310c9f52c91975934
- https://git.kernel.org/stable/c/787252a10d9422f3058df9a4821f389e5326c440
- https://mirrors.edge.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.10.76
- https://mirrors.edge.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.14.15
- https://mirrors.edge.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.15