Bug 2543015

Summary: CVE-2026-102473 dash: dash: Super-polynomial backtracking in pmatch when libc fnmatch is disabled [fedora-all]
Product: [Fedora] Fedora Reporter: Ganesh <gnaik>
Component: dashAssignee: Huzaifa S. Sidhpurwala <huzaifas>
Status: NEW --- QA Contact: Fedora Extras Quality Assurance <extras-qa>
Severity: medium Docs Contact:
Priority: medium    
Version: rawhideCC: dcantrell, huzaifas, maxim, svashisht
Target Milestone: ---Keywords: Security, SecurityTracking
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Hardware: Unspecified   
OS: Unspecified   
Whiteboard: {"flaws": ["81f3c443-43ed-4bfb-8ed2-40451ece1554"]}
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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: 2543005    

Description Ganesh 2026-09-29 08:55:26 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.

A flaw was found in dash. When built without libc fnmatch, the internal pmatch() matcher implements * by unbounded recursion over candidate positions. A local user who can plant filenames, or otherwise feed that matcher, can make a short multi-star pattern such as *.*.*.*.*.tar.gz consume excessive CPU.