Bug 2538208 (CVE-2026-93657) - CVE-2026-93657 hickory-resolver: hickory-resolver: DNSSEC validation bypass allows forged DNS records
Summary: CVE-2026-93657 hickory-resolver: hickory-resolver: DNSSEC validation bypass a...
Keywords:
Status: NEW
Alias: CVE-2026-93657
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
high
high
Target Milestone: ---
Assignee: Product Security DevOps Team
QA Contact:
URL:
Whiteboard:
Depends On: 2542973 2542974 2542975 2542976 2542978 2542979 2542981 2542977 2542980
Blocks:
TreeView+ depends on / blocked
 
Reported: 2026-09-22 17:25 UTC by OSIDB Bzimport
Modified: 2026-10-20 08:49 UTC (History)
9 users (show)

Fixed In Version:
Clone Of:
Environment:
Last Closed:
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System ID Private Priority Status Summary Last Updated
Red Hat Product Errata RHSA-2026:85848 0 None None None 2026-10-20 08:49:22 UTC

Description OSIDB Bzimport 2026-09-22 17:25:51 UTC 
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 2 Jon Orris 2026-10-20 08:49:21 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 10

Via RHSA-2026:85848 https://access.redhat.com/errata/RHSA-2026:85848
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