5.5

CVE-2021-46994

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

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()]
Daten sind bereitgestellt durch National Vulnerability Database (NVD)
Linux ≫ Linux Kernel Version >= 5.5 < 5.10.38
Linux ≫ Linux Kernel Version >= 5.11 < 5.11.22
Linux ≫ Linux Kernel Version >= 5.12 < 5.12.5
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Zu dieser CVE wurde keine Warnung gefunden.
EPSS Metriken
Typ Quelle Score Percentile
EPSS FIRST.org 0.24% 0.142
CVSS Metriken
Quelle Base Score Exploit Score Impact Score Vector String
nvd@nist.gov 5.5 1.8 3.6
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
CWE-476 NULL Pointer Dereference

The product dereferences a pointer that it expects to be valid but is NULL.

https://git.kernel.org/stable/c/03c427147b2d3e503af258711af4fc792b89b0af
Patch
https://git.kernel.org/stable/c/6f8f1c27b577de15f69fefce3c502bb6300d825c
Patch
https://git.kernel.org/stable/c/e1e10a390fd9479209c4d834d916ca5e6d5d396b
Patch
https://git.kernel.org/stable/c/eecb4df8ec9f896b19ee05bfa632ac6c1dcd8f21
Patch