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]
Affected versions
Linux kernel versions
3.4
and later are affected. Fixed in
5.4.300,
5.10.245,
5.15.194,
6.1.155,
6.6.109,
6.12.50,
6.16.10,
6.17
and their respective stable series.
References
The following references provide additional information about CVE-2025-40020 including vendor advisories, patch commits, exploit details, and third-party analysis. Links are sourced from the NIST NVD database.
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PatchKernel patch commithttps://git.kernel.org/stable/c/176c81cbf9c4e348610a421aad800087c0401f60
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PatchKernel patch commithttps://git.kernel.org/stable/c/17edec1830e48c0becd61642d0e40bc753243b16
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PatchKernel patch commithttps://git.kernel.org/stable/c/394c58017e5f41043584c345106cae16a4613710
Frequently asked questions
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What is CVE-2025-40020?
CVE-2025-40020 is a unscored severity Linux kernel vulnerability . It affects Linux kernel versions from 3.4 onward and has been patched in 5.4.300, 5.10.245, 5.15.194 and others. CVE-2025-40020 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.
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Is there a patch available for CVE-2025-40020?
Yes — CVE-2025-40020 has been patched. Fixed versions include 5.4.300, 5.10.245, 5.15.194 and others. If you are running Linux kernel 3.4 or later up to the fix versions, apply the relevant patch for your kernel branch.
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Is CVE-2025-40020 actively exploited?
No — CVE-2025-40020 has not been confirmed as actively exploited. It is not listed in the CISA Known Exploited Vulnerabilities (KEV) catalog.