Bug 2568778 (CVE-2026-123602) - CVE-2026-123602 hickory-recursor: hickory-resolver: Hickory DNS: DNS cache poisoning via child-side name server record reuse
Summary: CVE-2026-123602 hickory-recursor: hickory-resolver: Hickory DNS: DNS cache po...
Keywords:
Status: NEW
Alias: CVE-2026-123602
Product: Security Response
Classification: Other
Component: vulnerability-draft
Version: unspecified
Hardware: All
OS: Linux
medium
medium
Target Milestone: ---
Assignee: Product Security DevOps Team
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Blocks:
TreeView+ depends on / blocked
 
Reported: 2026-11-08 02:06 UTC by OSIDB Bzimport
Modified: 2026-11-08 02:06 UTC (History)
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Description OSIDB Bzimport 2026-11-08 02:06:15 UTC 
The Hickory DNS recursor in all versions of hickory-recursor and in hickory-resolver 0.26.0-beta.1 before 0.26.2 (recursor feature) is vulnerable to ghost domain names attacks because it reuses child-side apex NS RRsets cached from zone NS queries for iterative resolution. By repeatedly querying a zone's NS records, an attacker keeps the stale RRset cached indefinitely, letting name servers whose delegation the parent revoked keep answering for the zone.
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