CVE-2025-9340: Bouncy Castle for Java has Out-of-Bounds Write Vulnerability

August 22, 2025 (updated November 10, 2025)

Out-of-bounds Write vulnerability in Legion of the Bouncy Castle Inc. Bouncy Castle for Java bc-fips on All (API modules). This vulnerability is associated with program files org/bouncycastle/jcajce/provider/BaseCipher.

This issue affects Bouncy Castle for Java: from BC-FJA 2.1.0 through 2.1.0.

References

github.com/advisories/GHSA-g6rx-6wfx-gj74
github.com/bcgit/bc-java
github.com/bcgit/bc-java/wiki/CVE%E2%80%902025%E2%80%909340
nvd.nist.gov/vuln/detail/CVE-2025-9340

Code Behaviors & Features

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