CVE-2025-40175
In the Linux kernel, the following vulnerability has been resolved: idpf: cleanup remaining SKBs in PTP flows When the driver requests Tx timestamp value, one of the first steps is to clone SKB using skb_get. It increases the reference counter for that SKB to prevent unexpected freeing by another component. However, there may be a case where the index is requested, SKB is assigned and never consumed by PTP flows - for example due to reset during running PTP apps. Add a check in release timestamping function to verify if the SKB assigned to Tx timestamp latch was freed, and release remaining SKBs.
Affected versions
Linux kernel versions
6.16
and later are affected. Fixed in
6.17.5,
6.18
and their respective stable series.
References
The following references provide additional information about CVE-2025-40175 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/2c84e91ef831d4fedb0b94670b3cfd1cc5f966a5
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PatchKernel patch commithttps://git.kernel.org/stable/c/a3f8c0a273120fd2638f03403e786c3de2382e72
Frequently asked questions
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What is CVE-2025-40175?
CVE-2025-40175 is a unscored severity Linux kernel vulnerability . It affects Linux kernel versions from 6.16 onward and has been patched in 6.17.5 and 6.18. CVE-2025-40175 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-2025-40175?
Yes — CVE-2025-40175 has been patched. Fixed versions include 6.17.5 and 6.18. If you are running Linux kernel 6.16 or later up to the fix versions, apply the relevant patch for your kernel branch.
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Is CVE-2025-40175 actively exploited?
No — CVE-2025-40175 has not been confirmed as actively exploited. It is not listed in the CISA Known Exploited Vulnerabilities (KEV) catalog.