Improper Initialization in Linux kernel - CVE-2021-46913
Published: June 8, 2024 / Updated: May 13, 2025
Vulnerability identifier: #VU91557
CSH Severity: Low
CVSS v4.0: 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-2021-46913
CWE-ID: CWE-665
Exploitation vector: Local access
Exploit availability:
No public exploit available
Vendor: Linux Foundation
Affected software:
Linux kernel
Linux kernel
Detailed vulnerability description
The vulnerability allows a local user to perform a denial of service (DoS) attack.
The vulnerability exists due to improper initialization within the nf_tables_set_elem_destroy(), nft_add_set_elem() and set->ops->remove() functions in net/netfilter/nf_tables_api.c. A local user can perform a denial of service (DoS) attack.
How to mitigate CVE-2021-46913
Install update from vendor's website.
Sources
- https://git.kernel.org/stable/c/e51ff3ffc316377cca21de8b80404eed0c37b3c3
- https://git.kernel.org/stable/c/47d8de3c226574a3ddb8b87d0c152028d1bafef4
- https://git.kernel.org/stable/c/4d8f9065830e526c83199186c5f56a6514f457d2
- https://mirrors.edge.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.10.64
- https://mirrors.edge.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.11.16
- https://mirrors.edge.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.12