Bug 2464554

Summary: CVE-2026-5450 glibc: glibc: Heap Buffer Overflow in `scanf` with `%mc` format specifier and large width [fedora-all]
Product: [Fedora] Fedora Reporter: Keith Grant <kgrant>
Component: glibcAssignee: Carlos O'Donell <codonell>
Status: CLOSED CURRENTRELEASE QA Contact: Fedora Extras Quality Assurance <extras-qa>
Severity: medium Docs Contact:
Priority: medium    
Version: rawhideCC: arjun, ashankar, codonell, dj, fberat, fweimer, jlaw, josmyers, mcermak, mcoufal, mfabian, pfrankli, sipoyare, skolosov, suraj.ghimire7
Target Milestone: ---Keywords: Security, SecurityTracking
Target Release: ---   
Hardware: Unspecified   
OS: Unspecified   
Whiteboard: {"flaws": ["dbe78904-9cc4-4957-bef0-261a5786f6f3"]}
Fixed In Version: glibc-2.42-12.fc43 glibc-2.43-4.fc44 glibc-2.43.9000-15.fc45 Doc Type: ---
Doc Text:
Story Points: ---
Clone Of: Environment:
Last Closed: 2026-05-29 13:20:10 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: 2459853    

Description Keith Grant 2026-05-01 18:31:03 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 Arjun Shankar 2026-05-29 13:20:10 UTC 
This was fixed with 839898777226a3ed88c0859f25ffe712519b4ead, which is already in rawhide with glibc-2.43.9000-15.fc45.