CVE-2025-40020: can: peak_usb: fix shift-out-of-bounds issue

Severity: unknown
Exploited in the wild: not listed in CISA KEV
EPSS: 0.2% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2025-10-24 · updated 2026-10-19

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]

Affected products

Linux kernel: 3.4 — fixed in 6.17

How to fix

Upgrade to a fixed version: Linux kernel 6.17. Check the vendor advisory for mitigations.

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

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