CVE-2025-40057
In the Linux kernel, the following vulnerability has been resolved: ptp: Add a upper bound on max_vclocks syzbot reported WARNING in max_vclocks_store. This occurs when the argument max is too large for kcalloc to handle. Extend the guard to guard against values that are too large for kcalloc
Affected versions
Linux kernel versions
5.14
and later are affected. Fixed in
6.12.53,
6.17.3,
6.18
and their respective stable series.
References
The following references provide additional information about CVE-2025-40057 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/35ce5f163889dbce88eda1df661b357a09bbed87
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PatchKernel patch commithttps://git.kernel.org/stable/c/8dd446056336faa2283d62cefc2f576536845edc
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PatchKernel patch commithttps://git.kernel.org/stable/c/e9f35294e18da82162004a2f35976e7031aaf7f9
Frequently asked questions
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What is CVE-2025-40057?
CVE-2025-40057 is a unscored severity Linux kernel vulnerability . It affects Linux kernel versions from 5.14 onward and has been patched in 6.12.53, 6.17.3 and 6.18. CVE-2025-40057 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-2025-40057?
Yes — CVE-2025-40057 has been patched. Fixed versions include 6.12.53, 6.17.3 and 6.18. If you are running Linux kernel 5.14 or later up to the fix versions, apply the relevant patch for your kernel branch.
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Is CVE-2025-40057 actively exploited?
No — CVE-2025-40057 has not been confirmed as actively exploited. It is not listed in the CISA Known Exploited Vulnerabilities (KEV) catalog.