CVE-2025-68343
Published Dec 23, 2025
Modified Apr 15, 2026
Description
In the Linux kernel, the following vulnerability has been resolved: can: gs_usb: gs_usb_receive_bulk_callback(): check actual_length before accessing header The driver expects to receive a struct gs_host_frame in gs_usb_receive_bulk_callback(). Use struct_group to describe the header of the struct gs_host_frame and check that we have at least received the header before accessing any members of it. To resubmit the URB, do not dereference the pointer chain "dev->parent->hf_size_rx" but use "parent->hf_size_rx" instead. Since "urb->context" contains "parent", it is always defined, while "dev" is not defined if the URB it too short.
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References
Other References
https://git.kernel.org/stable/c/18cbce43363c9f84b90a92d57df341155eee0697
https://git.kernel.org/stable/c/3433680b759646efcacc64fe36aa2e51ae34b8f0
https://git.kernel.org/stable/c/616eee3e895b8ca0028163fcb1dce5e3e9dea322
https://git.kernel.org/stable/c/6fe9f3279f7d2518439a7962c5870c6e9ecbadcf
https://git.kernel.org/stable/c/f31693dc3a584c0ad3937e857b59dbc1a7ed2b87
Frequently Asked Questions
What is CVE-2025-68343? +
In the Linux kernel, the following vulnerability has been resolved:
can: gs_usb: gs_usb_receive_bulk_callback(): check actual_length before accessing header
The driver expects to receive a struct gs_host_frame in
gs_usb_receive_bulk_callback().
Use struct_group to describe the header of the struct gs_host_frame and
check that we have at least received the header before accessing any
members of it.
To resubmit the URB, do not dereference the pointer chain
"dev->parent->hf_size_rx" but use "parent->hf_size_rx" instead. Since
"urb->context" contains "parent", it is always defined, while "dev" is not
defined if the URB it too short.
How do I check if I'm vulnerable to CVE-2025-68343? +
You can use Secably's free Website Scanner to check your website for known vulnerabilities. For infrastructure scanning, use the Port Scanner to identify exposed services that may be affected. Check the vendor advisories linked above for specific patch and version information.