CVE-2025-40109
In the Linux kernel, the following vulnerability has been resolved: crypto: rng - Ensure set_ent is always present Ensure that set_ent is always set since only drbg provides it.
Affected versions
Linux kernel versions
5.10
and later are affected. Fixed in
5.10.246,
5.15.195,
6.1.156,
6.6.111,
6.12.52,
6.16.12,
6.17.2,
6.18
and their respective stable series.
References
8 totalFrequently asked questions
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What is CVE-2025-40109?
CVE-2025-40109 is a unscored severity Linux kernel vulnerability . It affects Linux kernel versions from 5.10 onward and has been patched in 5.10.246, 5.15.195, 6.1.156 and others. CVE-2025-40109 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-2025-40109?
Yes. CVE-2025-40109 has been patched. Fixed versions include 5.10.246, 5.15.195, 6.1.156 and others. If you are running Linux kernel 5.10 or later up to the fix versions, apply the relevant patch for your kernel branch.
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Is CVE-2025-40109 actively exploited?
No. CVE-2025-40109 has not been confirmed as actively exploited. It is not listed in the CISA Known Exploited Vulnerabilities (KEV) catalog.