Bug 2486336

Summary: CVE-2026-48103 advancecomp: off-by-one heap-based buffer over-read in the WIM archive handler [fedora-all]
Product: [Fedora] Fedora Reporter: Guilherme de Almeida Suckevicz <gsuckevi>
Component: advancecompAssignee: Ben Beasley <code>
Status: CLOSED NOTABUG QA Contact: Fedora Extras Quality Assurance <extras-qa>
Severity: medium Docs Contact:
Priority: medium    
Version: rawhideCC: code, i, tdawson
Target Milestone: ---Keywords: Security, SecurityTracking
Target Release: ---   
Hardware: Unspecified   
OS: Unspecified   
Whiteboard: {"flaws": ["55aec053-d03a-4dad-a906-db5036087bc1"]}
Fixed In Version: Doc Type: ---
Doc Text:
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Clone Of: Environment:
Last Closed: 2026-06-08 18:47:14 UTC Type: ---
Regression: --- Mount Type: ---
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oVirt Team: --- RHEL 7.3 requirements from Atomic Host:
Cloudforms Team: --- Target Upstream Version:
Embargoed:
Bug Depends On:    
Bug Blocks: 2485508    

Description Guilherme de Almeida Suckevicz 2026-06-08 13:31:15 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.
Comment 1 Ben Beasley 2026-06-08 18:47:14 UTC 
The advancecomp package *does* contain some code forked from a now-ancient version of 7-Zip, but it does not contain any code related to Windows Imaging (WIM) archives, nor does it contain a table called SecurOffsets (or SecureOffsets), so it isn’t affected by this CVE.

https://www.cve.org/CVERecord?id=CVE-2026-48103