REDHAT-BUG-2458640: High severity Bouncy Castle BC-JAVA bcprov vulnerability

Published Apr 15, 2026
·
Updated

Use of a Broken or Risky Cryptographic Algorithm vulnerability in Legion of the Bouncy Castle Inc. BC-JAVA bcprov on all (core modules). This vulnerability is associated with program files G3413CTRBlockCipher.

GOSTCTR implementation unable to process more than 255 blocks correctly.

This issue affects BC-JAVA: from 1.59 before 1.84.

Affected Software

1 affected component
Bouncy Castle BC-JAVA bcprov>=1.59<1.84

Event History

Apr 15, 2026
Data Sourced
via Red Hat·10:01 AM
DescriptionSeverityAffected Software

Frequently Asked Questions

1

What is the severity of REDHAT-BUG-2458640?

The severity of REDHAT-BUG-2458640 is classified as high with a score of 7.

2

How do I fix REDHAT-BUG-2458640?

To fix REDHAT-BUG-2458640, upgrade to a patched version of Bouncy Castle BC-JAVA bcprov that addresses the cryptographic algorithm issue.

3

What does REDHAT-BUG-2458640 affect?

REDHAT-BUG-2458640 affects all core modules of the Bouncy Castle BC-JAVA bcprov library.

4

What is the main issue with GOSTCTR implementation in REDHAT-BUG-2458640?

The main issue with the GOSTCTR implementation in REDHAT-BUG-2458640 is its inability to correctly process more than 255 blocks.

5

Who is responsible for Bouncy Castle BC-JAVA bcprov?

Bouncy Castle BC-JAVA bcprov is maintained by the Legion of the Bouncy Castle Inc.

Contact

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