Memory leak in Linux kernel - CVE-2021-47021
Published: May 31, 2024 / Updated: May 14, 2025
Vulnerability identifier: #VU90481
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-2021-47021
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 mt7915_unregister_device() function in drivers/net/wireless/mediatek/mt76/mt7915/init.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/81483309ce861a9fa7835322787f68a443fea364
- https://git.kernel.org/stable/c/d754c80ae82a662e692a82faad71b8c218cb7f52
- https://git.kernel.org/stable/c/e9d32af478cfc3744a45245c0b126738af4b3ac4
- https://mirrors.edge.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.11.21
- https://mirrors.edge.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.12.4
- https://mirrors.edge.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.13