Bug 2543681

Summary: CVE-2026-84782 bootc: openssl: Information disclosure via DTLS handshake retransmission [fedora-all]
Product: [Fedora] Fedora Reporter: Marco Benatto <mbenatto>
Component: bootcAssignee: Colin Walters <walters>
Status: NEW --- QA Contact:
Severity: high Docs Contact:
Priority: high    
Version: rawhideCC: ckyrouac, dev, jmarrero, jonathan, renner0, walters, xiaofwan
Target Milestone: ---Keywords: Security, SecurityTracking
Target Release: ---   
Hardware: Unspecified   
OS: Unspecified   
Whiteboard: {"flaws": ["57c69a43-7943-4481-9b6e-c53b90f578b4"]}
Fixed In Version: Doc Type: ---
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Verified Versions: Category: ---
oVirt Team: --- RHEL 7.3 requirements from Atomic Host:
Cloudforms Team: --- Target Upstream Version:
Embargoed:
Bug Depends On:    
Bug Blocks: 2537080    

Description Marco Benatto 2026-09-29 21:42:59 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.

The DTLS retransmission logic does not correctly handle a handshake message write that is suspended part-way through.
The retransmitted message can be read past the message buffer and the retransmission overwrites the internal state the suspended write needs to resume correctly.