Bug 2450237

Summary:	CVE-2026-4437 zig: glibc: Incorrect DNS response parsing via crafted DNS server response [fedora-43]
Product:	[Fedora] Fedora	Reporter:	Sandipan Roy <saroy>
Component:	zig	Assignee:	Jan Drögehoff <sentrycraft123>
Status:	CLOSED NOTABUG	QA Contact:
Severity:	medium	Docs Contact:
Priority:	medium
Version:	43	CC:	baltevl, purin21345, sentrycraft123, suraj.ghimire7
Target Milestone:	---	Keywords:	Security, SecurityTracking
Target Release:	---
Hardware:	Unspecified
OS:	Unspecified
Whiteboard:	{"flaws": ["19e0c09c-d489-45af-8efe-2212ef38cec5"]}
Fixed In Version:		Doc Type:	---
Doc Text:		Story Points:	---
Clone Of:		Environment:
Last Closed:	2026-03-24 17:53:34 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 06:56:28 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 Jan Drögehoff 2026-03-24 17:49:59 UTC

*** Bug 2450234 has been marked as a duplicate of this bug. ***

Comment 2 Jan Drögehoff 2026-03-24 17:50:05 UTC

*** Bug 2450230 has been marked as a duplicate of this bug. ***

Comment 3 Jan Drögehoff 2026-03-24 17:50:14 UTC

*** Bug 2450228 has been marked as a duplicate of this bug. ***

Comment 4 Jan Drögehoff 2026-03-24 17:53:34 UTC

neither `gethostbyaddr` nor `gethostbyaddr_r` are used by the Zig compiler or the Zig standard library.