CVE-2025-40109
Published Nov 9, 2025
Modified Apr 15, 2026
Description
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.
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References
Other References
https://git.kernel.org/stable/c/15d6f42da1bb527629d8e1067b1302d58dec9166
https://git.kernel.org/stable/c/17acbcd44fe8dc17dc1072375e76df2d52da6ac8
https://git.kernel.org/stable/c/915cb75983bc5e8b80f8a2f25a4af463f7b18c14
https://git.kernel.org/stable/c/ab172f4f42626549b02bada05f09e3f2b0cc26ec
https://git.kernel.org/stable/c/bd903c25b652c331831226cdf56c8179d18e43f4
https://git.kernel.org/stable/c/c0d36727bf39bb16ef0a67ed608e279535ebf0da
https://git.kernel.org/stable/c/c5c703b50e91dd4748769f4c5ab50d9ad60be370
https://git.kernel.org/stable/c/e247a7d138e514a40edda7c4d72c8bd49bb2cad3
Frequently Asked Questions
What is 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.
How do I check if I'm vulnerable to CVE-2025-40109? +
You can use Secably's free Website Scanner to check your website for known vulnerabilities. For infrastructure scanning, use the Port Scanner to identify exposed services that may be affected. Check the vendor advisories linked above for specific patch and version information.