Improper locking in Linux kernel - CVE-2021-47349
Published: June 3, 2024 / Updated: May 14, 2025
Vulnerability identifier: #VU90744
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-2021-47349
CWE-ID: CWE-667
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 locking within the mwifiex_uninit_sw() function in drivers/net/wireless/marvell/mwifiex/main.c. A local user can perform a denial of service (DoS) attack.
How to mitigate CVE-2021-47349
Install update from vendor's website.
Sources
- https://git.kernel.org/stable/c/a3041d39d3c14da97fa3476835aba043ba810cf0
- https://git.kernel.org/stable/c/35af69c7c0490fdccfc159c6a87e4d1dc070838a
- https://git.kernel.org/stable/c/1f9482aa8d412b4ba06ce6ab8e333fb8ca29a06e
- https://mirrors.edge.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.12.18
- https://mirrors.edge.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.13.3
- https://mirrors.edge.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.14