#VU90737 Improper locking in Linux kernel - CVE-2021-47469
Published: June 3, 2024 / Updated: May 14, 2025
Vulnerability identifier: #VU90737
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-2021-47469
CWE-ID: CWE-667
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 improper locking within the LIST_HEAD(), spi_add_device(), spi_add_device_locked(), spi_register_controller() and spi_unregister_controller() functions in drivers/spi/spi.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/722ef19a161ce3fffb3d1b01ce2301c306639bdd
- https://git.kernel.org/stable/c/6098475d4cb48d821bdf453c61118c56e26294f0
- https://mirrors.edge.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.10.230
- https://mirrors.edge.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.14.15
- https://mirrors.edge.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.15
- https://mirrors.edge.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.4.286