#VU89947 Memory leak in Linux kernel - CVE-2021-47237
Published: May 30, 2024 / Updated: May 14, 2025
Vulnerability identifier: #VU89947
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-2021-47237
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 mkiss_close() function in drivers/net/hamradio/mkiss.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/c634ba0b4159838ff45a60d3a0ace3b4118077a5
- https://git.kernel.org/stable/c/3942d0f9ace1a95a74930b5b4fc0e5005c62b37b
- https://git.kernel.org/stable/c/765a8a04f828db7222b36a42b1031f576bfe95c3
- https://git.kernel.org/stable/c/c16c4716a1b5ba4f83c7e00da457cba06761f119
- https://git.kernel.org/stable/c/a49cbb762ef20655f5c91abdc13658b0af5e159d
- https://git.kernel.org/stable/c/290b0b6432e2599021db0b8d6046f756d931c29f
- https://git.kernel.org/stable/c/f4de2b43d13b7cf3ced9310e371b90c836dbd7cd
- https://git.kernel.org/stable/c/7edcc682301492380fbdd604b4516af5ae667a13
- https://mirrors.edge.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.14.238
- https://mirrors.edge.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.19.196
- https://mirrors.edge.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.4.274
- https://mirrors.edge.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.9.274
- https://mirrors.edge.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.10.46
- https://mirrors.edge.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.12.13
- https://mirrors.edge.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.13
- https://mirrors.edge.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.4.128