#VU91661 Memory leak in Linux kernel - CVE-2021-46972
Published: June 10, 2024 / Updated: May 13, 2025
Vulnerability identifier: #VU91661
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-2021-46972
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 ovl_lookup() function in fs/overlayfs/namei.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/71d58457a8afc650da5d3292a7f7029317654d95
- https://git.kernel.org/stable/c/cf3e3330bc5719fa9d658e3e2f596bde89344a94
- https://git.kernel.org/stable/c/d587cfaef72b1b6f4b2774827123bce91f497cc8
- https://git.kernel.org/stable/c/eaab1d45cdb4bb0c846bd23c3d666d5b90af7b41
- https://mirrors.edge.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.10.35
- https://mirrors.edge.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.11.19
- https://mirrors.edge.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.12.2
- https://mirrors.edge.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.13