Bug 2450236

Summary: CVE-2026-4437 glibc: glibc: Incorrect DNS response parsing via crafted DNS server response [fedora-43]
Product: [Fedora] Fedora Reporter: Sandipan Roy <saroy>
Component: glibcAssignee: Carlos O'Donell <codonell>
Status: CLOSED CURRENTRELEASE QA Contact: Fedora Extras Quality Assurance <extras-qa>
Severity: medium Docs Contact:
Priority: medium    
Version: 43CC: arjun, 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": ["19e0c09c-d489-45af-8efe-2212ef38cec5"]}
Fixed In Version: glibc-2.42-11.fc43 Doc Type: ---
Doc Text:
Story Points: ---
Clone Of: Environment:
Last Closed: 2026-04-17 13:41:55 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: 2449777    

Description Sandipan Roy 2026-03-23 06:56:22 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 Carlos O'Donell 2026-04-17 13:41:55 UTC 
Fixed in glibc-2.42-11.fc43
https://bodhi.fedoraproject.org/updates/FEDORA-2026-d13513697d