Bug 2348627 (CVE-2025-21773)

Summary: CVE-2025-21773 kernel: can: etas_es58x: fix potential NULL pointer dereference on udev->serial
Product: [Other] Security Response Reporter: OSIDB Bzimport <bzimport>
Component: vulnerabilityAssignee: Product Security DevOps Team <prodsec-dev>
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Priority: medium    
Version: unspecifiedCC: dfreiber, drow, jburrell, vkumar
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Hardware: All   
OS: Linux   
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Description OSIDB Bzimport 2025-02-27 03:05:37 UTC 
In the Linux kernel, the following vulnerability has been resolved:

can: etas_es58x: fix potential NULL pointer dereference on udev->serial

The driver assumed that es58x_dev->udev->serial could never be NULL.
While this is true on commercially available devices, an attacker
could spoof the device identity providing a NULL USB serial number.
That would trigger a NULL pointer dereference.

Add a check on es58x_dev->udev->serial before accessing it.
Comment 1 Michal Findra 2025-02-27 20:27:12 UTC 
Upstream advisory:
https://lore.kernel.org/linux-cve-announce/2025022606-CVE-2025-21773-2ee7@gregkh/T