Bug 2510252 (CVE-2026-13586)

Summary: CVE-2026-13586 bouncycastle: Bouncy Castle for Java: Denial of Service via PKCS#12 MAC and bag-decryption KDF iteration-count bound
Product: [Other] Security Response Reporter: OSIDB Bzimport <bzimport>
Component: vulnerabilityAssignee: Product Security DevOps Team <prodsec-dev>
Status: NEW --- QA Contact:
Severity: medium Docs Contact:
Priority: medium    
Version: unspecifiedCC: anujha, asoldano, bbaranow, bmaxwell, bstansbe, dlofthou, gmalinko, istudens, ivassile, iweiss, janstey, mosmerov, msvehla, nwallace, pberan, pdelbell, pesilva, pjindal, pmackay, rstancel, rstepani, thjenkin, vdosoudi
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. This vulnerability allows a remote attacker to cause a Denial of Service (DoS) by exploiting an iteration-count bound issue in the PKCS#12 Message Authentication Code (MAC) and bag-decryption Key Derivation Function (KDF). This could make the affected system unresponsive or unavailable to legitimate users.
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oVirt Team: --- RHEL 7.3 requirements from Atomic Host:
Cloudforms Team: --- Target Upstream Version:
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Bug Depends On: 2524917, 2524919    
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Description OSIDB Bzimport 2026-08-03 04:01:13 UTC
In Bouncy Castle for Java before 1.85, PKCS#12 MAC and bag-decryption KDF iteration-count bound (DoS). 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).