Bug 2510224 (CVE-2026-58061)

Summary: CVE-2026-58061 org.bouncycastle/bc-java: org.bouncycastle/bc-fja: Bouncy Castle for Java: Integrity bypass in CCM-family modes
Product: [Other] Security Response Reporter: OSIDB Bzimport <bzimport>
Component: vulnerabilityAssignee: Product Security DevOps Team <prodsec-dev>
Status: NEW --- QA Contact:
Severity: high Docs Contact:
Priority: high    
Version: unspecifiedCC: rhel-process-autobot, watson-tool-maintainers
Target Milestone: ---Keywords: Security
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Hardware: All   
OS: Linux   
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A flaw was found in Bouncy Castle for Java. When using CCM-family (Counter with CBC-MAC) modes, the software writes plaintext data into a buffer before verifying the cryptographic tag. This could allow an attacker to manipulate data that is later assumed to be authentic, leading to a high integrity impact if the plaintext is processed before the tag validation completes.
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oVirt Team: --- RHEL 7.3 requirements from Atomic Host:
Cloudforms Team: --- Target Upstream Version:
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Description OSIDB Bzimport 2026-08-03 03:01:48 UTC
In Bouncy Castle for Java before 1.85, CCM-family modes write plaintext to caller buffer before tag check. This issue also affects Bouncy Castle for Java LTS before 2.73.12, and Bouncy Castle for Java FIPS (BC-FJA) before bc-fips 1.0.2.7 (1.0.X series), 2.0.2 (2.0.X series) and 2.1.3 (2.1.X series).