Vulnerability CVE-2021-46994
Published: 2024-02-28

Description:
In the Linux kernel, the following vulnerability has been resolved:

can: mcp251x: fix resume from sleep before interface was brought up

Since 8ce8c0abcba3 the driver queues work via priv->restart_work when
resuming after suspend, even when the interface was not previously
enabled. This causes a null dereference error as the workqueue is only
allocated and initialized in mcp251x_open().

To fix this we move the workqueue init to mcp251x_can_probe() as there
is no reason to do it later and repeat it whenever mcp251x_open() is
called.

[mkl: fix error handling in mcp251x_stop()]

 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
Copyright 2026, cxsecurity.com

 

Back to Top