Memory leak in Linux kernel - CVE-2021-47116
Published: May 30, 2024 / Updated: May 14, 2025
Vulnerability identifier: #VU90015
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-2021-47116
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 ext4_mb_init_backend() function in fs/ext4/mballoc.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/2050c6e5b161e5e25ce3c420fef58b24fa388a49
- https://git.kernel.org/stable/c/04fb2baa0b147f51db065a1b13a11954abe592d0
- https://git.kernel.org/stable/c/a8867f4e3809050571c98de7a2d465aff5e4daf5
- 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