Bug 2569305

Summary: CVE-2026-71199 krb5: Alteration of authentication indicators in CAMMAC container [fedora-all]
Product: [Fedora] Fedora Reporter: Vladimir Vasilev <vvasilev>
Component: krb5Assignee: Julien Rische <jrische>
Status: NEW --- QA Contact: Fedora Extras Quality Assurance <extras-qa>
Severity: high Docs Contact:
Priority: high    
Version: rawhideCC: abokovoy, antorres, ftrivino, jrische, j, sbose, ssorce
Target Milestone: ---Keywords: Security, SecurityTracking
Target Release: ---   
Hardware: Unspecified   
OS: Unspecified   
Whiteboard: {"flaws": ["812a6156-e353-4c58-a2eb-c432d14568d4"]}
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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:    
Bug Blocks: 2563453    

Description Vladimir Vasilev 2026-11-10 08:30:05 UTC 
Disclaimer: Community trackers are created by Red Hat Product Security team on a best effort basis. Package maintainers are required to ascertain if the flaw indeed affects their package, before starting the update process.

In MIT krb5 release 1.14 and later (since authentication indicator support was added), an authenticated attacker can bypass authentication indicator requirements using an unkeyed checksum in the CAMMAC authdata container.