CVE-2024-14041 Information disclosure in BC-JAVA

What is CVE-2024-14041?

CVE-2024-14041 is a high-severity vulnerability in Bouncycastle Bc-Java, published on 28 Jul 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.

Official description

In Bouncy Castle for Java from 1.73 to before 1.78, three ML-KEM (CRYSTALS-Kyber) routines divided secret-derived polynomial coefficients by the modulus q: Poly.toMsg, which decodes the decrypted message, and the ciphertext compression routines Poly.compressPoly and PolyVec.compressPolyVec. An attacker able to measure the timing of a large number of decapsulations performed with the same long-term private key can recover that key. These are the KyberSlash1 (Poly.toMsg) and KyberSlash2 (ciphertext compression) divisions. Compression performed during encapsulation operates on values that become the public ciphertext and is not affected.

Weakness: CWE-208

Which versions are affected by CVE-2024-14041?

It affects 1 product.

Products include Bouncycastle Bc-Java.

How do I fix CVE-2024-14041?

Upgrade to a fixed version.

Is CVE-2024-14041 being exploited?

There is no known exploitation of CVE-2024-14041 in the wild and no public exploit code.

Other vulnerabilities in Bouncycastle Bc-Java

• CVE-2007-6721 Legion of the Bouncy Castle Java Cryptography API Bleichenbacher Oracle Vulnerability Critical 10.0
• CVE-2018-1000613 Deserialization of Untrusted Data in Bouncy castle Critical 9.8
• CVE-2026-58062 Stapled OCSP response accepted without binding to the checked certificate Critical 9.3
• CVE-2026-59638 JSSE hostname verifier CN-fallback enabled by default despite documented opt-in Critical 9.3
• CVE-2026-59650 MTI/A0 DH agreement exponentiates unvalidated peer value Critical 9.3

All Bouncycastle Bc-Java vulnerabilities

Sources

• CVE record
• NVD
• OSV
• GitHub advisory
• How this page is made

Also known as DEBIAN-CVE-2024-14041, GHSA-6wh4-p7q8-98wf, UBUNTU-CVE-2024-14041.