CVE-2025-40299
In the Linux kernel, the following vulnerability has been resolved: gve: Implement gettimex64 with -EOPNOTSUPP gve implemented a ptp_clock for sole use of do_aux_work at this time. ptp_clock_gettime() and ptp_sys_offset() assume every ptp_clock has implemented either gettimex64 or gettime64. Stub gettimex64 and return -EOPNOTSUPP to prevent NULL dereferencing.
Affected versions
Linux kernel versions
6.17
and later are affected. Fixed in
6.17.8,
6.18
and their respective stable series.
References
The following references provide additional information about CVE-2025-40299 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/6ab753b5d8e521616cd9bd10b09891cbeb7e0235
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PatchKernel patch commithttps://git.kernel.org/stable/c/96ec90412ceb58c73fd3714e40ab2cee1eedac3b
Frequently asked questions
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What is CVE-2025-40299?
CVE-2025-40299 is a unscored severity Linux kernel vulnerability . It affects Linux kernel versions from 6.17 onward and has been patched in 6.17.8 and 6.18. CVE-2025-40299 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-2025-40299?
Yes — CVE-2025-40299 has been patched. Fixed versions include 6.17.8 and 6.18. If you are running Linux kernel 6.17 or later up to the fix versions, apply the relevant patch for your kernel branch.
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Is CVE-2025-40299 actively exploited?
No — CVE-2025-40299 has not been confirmed as actively exploited. It is not listed in the CISA Known Exploited Vulnerabilities (KEV) catalog.