Memory leak in Linux kernel - CVE-2021-46996
Published: May 31, 2024 / Updated: May 14, 2025
Vulnerability identifier: #VU90483
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-2021-46996
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 INIT_LIST_HEAD() function in net/netfilter/nf_tables_api.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/2c784a500f5edd337258b0fdb2f31bc9abde1a23
- https://git.kernel.org/stable/c/59fa98bfa1f4013d658d990cac88c87b46ff410c
- https://git.kernel.org/stable/c/dd3bebf515f336214a91994348a2b86b9a1d3d7f
- https://git.kernel.org/stable/c/85dfd816fabfc16e71786eda0a33a7046688b5b0
- https://mirrors.edge.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.10.38
- https://mirrors.edge.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.11.22
- https://mirrors.edge.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.12.5
- https://mirrors.edge.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.13