Memory leak in Linux kernel - CVE-2021-47226
Published: June 10, 2024 / Updated: May 13, 2025
Vulnerability identifier: #VU91635
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-2021-47226
CWE-ID: CWE-401
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 memory leak within the __fpu__restore_sig() function in arch/x86/kernel/fpu/signal.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/a7748e021b9fb7739e3cb88449296539de0b6817
- https://git.kernel.org/stable/c/002665dcba4bbec8c82f0aeb4bd3f44334ed2c14
- https://git.kernel.org/stable/c/d8778e393afa421f1f117471144f8ce6deb6953a
- https://mirrors.edge.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.10.46
- https://mirrors.edge.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.12.13
- https://mirrors.edge.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.13