Bug 2542974

Summary:	CVE-2026-93657 rust-hickory-resolver0.25: hickory-resolver: DNSSEC validation bypass allows forged DNS records [fedora-all]
Product:	[Fedora] Fedora	Reporter:	Ganesh <gnaik>
Component:	rust-hickory-resolver0.25	Assignee:	Rust SIG <rust-sig>
Status:	ASSIGNED ---	QA Contact:
Severity:	high	Docs Contact:
Priority:	high
Version:	rawhide	CC:	decathorpe, rust-sig
Target Milestone:	---	Keywords:	Security, SecurityTracking
Target Release:	---
Hardware:	Unspecified
OS:	Unspecified
Whiteboard:	{"flaws": ["6a2d8040-7455-49ab-8227-c63a4e3d74bf"]}
Fixed In Version:		Doc Type:	---
Doc Text:		Story Points:	---
Clone Of:		Environment:
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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:	2538208

Description Ganesh 2026-09-29 06:59:22 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.

hickory-resolver versions before 0.26.2 fail to propagate bogus DNSSEC proof states through the Resolver::lookup() and Resolver::lookup_ip() APIs, allowing invalid records to be returned as successful results. Attackers controlling the answering zone or positioned on the network path can have forged DNS records accepted as validated, bypassing DNSSEC authentication checks.

Comment 1 Fabio Valentini 2026-09-29 15:02:36 UTC

Applications and libraries need to be ported to hickory-resolver v0.26 since v0.25 is no longer maintained.

It appears that the only dependent application of rust-hickory-resolver0.25 is currently rust-sequoia-sq, and there is upstream work (not yet part of a tagged release) to port to hickory-dns v0.26.