Bug 2566916

Summary: CVE-2026-118384 mtools: mtools: Denial of Service via out-of-bounds write in VFAT parsing [fedora-rawhide]
Product: [Fedora] Fedora Reporter: Oleg Sushchenko <osushche>
Component: mtoolsAssignee: Vojtech Trefny <vtrefny>
Status: CLOSED RAWHIDE QA Contact: Fedora Extras Quality Assurance <extras-qa>
Severity: medium Docs Contact:
Priority: medium    
Version: rawhideCC: vtrefny
Target Milestone: ---Keywords: Security, SecurityTracking
Target Release: ---   
Hardware: Unspecified   
OS: Unspecified   
Whiteboard: {"flaws": ["45fd65be-9522-4cef-be37-0052a0bc0453"]}
Fixed In Version: mtools-4.0.50-1.fc46 Doc Type: ---
Doc Text:
Story Points: ---
Clone Of: Environment:
Last Closed: 2026-11-04 13:52:05 UTC Type: ---
Regression: --- Mount Type: ---
Documentation: --- CRM:
Verified Versions: Category: ---
oVirt Team: --- RHEL 7.3 requirements from Atomic Host:
Cloudforms Team: --- Target Upstream Version:
Embargoed:
Bug Depends On:    
Bug Blocks: 2562560    

Description Oleg Sushchenko 2026-11-04 13:46:23 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.

GNU mtools through 4.0.49 has an out-of-bounds write in parse_vses in vfat.c.