CVE-2025-40109
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BaseFortify

Publication date: 2025-11-09

Last updated on: 2025-11-12

Assigner: kernel.org

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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Meta Information
Published
2025-11-09
Last Modified
2025-11-12
Generated
2026-06-16
AI Q&A
2025-11-09
EPSS Evaluated
2026-06-15
NVD
CVE-2025-40109
Affected Vendors & Products
Currently, no data is known.
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Exploitability
CWE
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CWE ID Description
CWE-UNKNOWN
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Executive Summary

This vulnerability in the Linux kernel's crypto random number generator (rng) involves ensuring that the set_ent function is always present. The issue arises because only the deterministic random bit generator (drbg) provides set_ent, and the fix ensures that set_ent is always set to maintain proper functionality.

Impact Analysis

If set_ent is not always present in the rng implementation, it could lead to improper random number generation, potentially weakening cryptographic operations that rely on strong randomness. This could impact system security by making cryptographic keys or operations less secure.

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