Bug 2542976

Summary:	CVE-2026-93657 rust-hickory-resolver0.24: hickory-resolver: DNSSEC validation bypass allows forged DNS records [fedora-all]
Product:	[Fedora] Fedora	Reporter:	Ganesh <gnaik>
Component:	rust-hickory-resolver0.24	Assignee:	Rust SIG <rust-sig>
Status:	ASSIGNED ---	QA Contact:
Severity:	high	Docs Contact:
Priority:	high
Version:	rawhide	CC:	code, 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:	---
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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 06:59:35 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 Ben Beasley 2026-09-29 09:27:29 UTC

https://www.cve.org/CVERecord?id=CVE-2026-93657

https://github.com/hickory-dns/hickory-dns/security/advisories/GHSA-5j98-2g5x-46v6

It may be possible to backport the specific linked fix https://github.com/hickory-dns/hickory-dns/commit/30720f4fb22e5556ecbf26d2c8274ea4a9fdd238 to 0.24, but it’s not quite trivial, and blindly patching security-critical code has its own risks. I’m not inclined to try to “fix” this within the rust-hickory-resolver0.24 compat package. Instead, the proper solution will be to find a way to migrate dependencies forward to hickory-dns 0.26, https://forge.fedoraproject.org/rust/backlog/issues/33, and retire the 0.24 and 0.25 compat packages.

Comment 2 Fabio Valentini 2026-09-29 15:05:43 UTC

Affected applications:

- rust-sequoia-chameleon-gnupg
- rust-sequoia-git
- rust-sequoia-octopus-librnp
- rust-sequoia-sq

There is upstream work (not yet part of a tagged release) to port sequoia-net and other sequoia-pgp crates to hickory-dns v0.26, which will resolve this issue.