CVE-2025-40020
Published Oct 24, 2025
Modified Apr 15, 2026
Description
In the Linux kernel, the following vulnerability has been resolved: can: peak_usb: fix shift-out-of-bounds issue Explicitly uses a 64-bit constant when the number of bits used for its shifting is 32 (which is the case for PC CAN FD interfaces supported by this driver). [mkl: update subject, apply manually]
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References
Other References
https://git.kernel.org/stable/c/176c81cbf9c4e348610a421aad800087c0401f60
https://git.kernel.org/stable/c/17edec1830e48c0becd61642d0e40bc753243b16
https://git.kernel.org/stable/c/394c58017e5f41043584c345106cae16a4613710
https://git.kernel.org/stable/c/48822a59ecc47d353400d38b1941d3ae7591ffff
https://git.kernel.org/stable/c/572c656802781cc57f4a3231eefa83547e75ed78
https://git.kernel.org/stable/c/61b1dd4c614935169d12bdecc26906e37b508618
https://git.kernel.org/stable/c/c443be70aaee42c2d1d251e0329e0a69dd96ae54
https://git.kernel.org/stable/c/eb79ed970670344380e77d62f8188e8015648d94
Frequently Asked Questions
What is CVE-2025-40020? +
In the Linux kernel, the following vulnerability has been resolved:
can: peak_usb: fix shift-out-of-bounds issue
Explicitly uses a 64-bit constant when the number of bits used for its
shifting is 32 (which is the case for PC CAN FD interfaces supported by
this driver).
[mkl: update subject, apply manually]
How do I check if I'm vulnerable to CVE-2025-40020? +
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.