#VU96620 Resource management error in Linux kernel - CVE-2021-4442
Published: August 29, 2024 / Updated: May 12, 2025
Vulnerability identifier: #VU96620
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-2021-4442
CWE-ID: CWE-399
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 resource management error within the do_tcp_setsockopt() function in net/ipv4/tcp.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/319f460237fc2965a80aa9a055044e1da7b3692a
- https://git.kernel.org/stable/c/3bf899438c123c444f6b644a57784dfbb6b15ad6
- https://git.kernel.org/stable/c/046f3c1c2ff450fb7ae53650e9a95e0074a61f3e
- https://git.kernel.org/stable/c/3b72d5a703842f582502d97906f17d6ee122dac2
- https://git.kernel.org/stable/c/8811f4a9836e31c14ecdf79d9f3cb7c5d463265d
- https://mirrors.edge.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.19.181
- https://mirrors.edge.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.10.24
- https://mirrors.edge.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.11.7
- https://mirrors.edge.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.12
- https://mirrors.edge.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.4.106