Improper error handling in Linux kernel - CVE-2021-46994
Published: June 3, 2024 / Updated: May 13, 2025
Vulnerability identifier: #VU90961
CSH Severity: Low
CVSS v4: 6.8 [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]
CVE-ID: CVE-2021-46994
CWE-ID: CWE-388
Exploitation vector: Local access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a local user to perform a denial of service (DoS) attack.
The vulnerability exists due to improper error handling within the mcp251x_stop(), mcp251x_open(), mcp251x_can_probe() and mcp251x_can_remove() functions in drivers/net/can/spi/mcp251x.c. A local user can perform a denial of service (DoS) attack.
Affected software
Linux kernel
How to mitigate CVE-2021-46994
Install update from vendor's website.
Linux kernel - addressed in versions 5.10.38, 5.11.22, 5.12.5, 5.13
External References
- https://git.kernel.org/stable/c/eecb4df8ec9f896b19ee05bfa632ac6c1dcd8f21
- https://git.kernel.org/stable/c/6f8f1c27b577de15f69fefce3c502bb6300d825c
- https://git.kernel.org/stable/c/e1e10a390fd9479209c4d834d916ca5e6d5d396b
- https://git.kernel.org/stable/c/03c427147b2d3e503af258711af4fc792b89b0af
- https://mirrors.edge.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.10.38
- https://mirrors.edge.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.11.22
- https://mirrors.edge.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.12.5
- https://mirrors.edge.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.13