Bug 2568716 (CVE-2026-123598) - CVE-2026-123598 hickory-recursor: hickory-resolver: hickory-net: Hickory DNS: Denial of service via extended caching of invalid DNSSEC responses
Summary: CVE-2026-123598 hickory-recursor: hickory-resolver: hickory-net: Hickory DNS:...
Keywords:
Status: NEW
Alias: CVE-2026-123598
Product: Security Response
Classification: Other
Component: vulnerability-draft
Version: unspecified
Hardware: All
OS: Linux
low
low
Target Milestone: ---
Assignee: Product Security DevOps Team
QA Contact:
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Whiteboard:
Depends On:
Blocks:
TreeView+ depends on / blocked
 
Reported: 2026-11-08 02:01 UTC by OSIDB Bzimport
Modified: 2026-11-08 02:45 UTC (History)
0 users

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Description OSIDB Bzimport 2026-11-08 02:01:55 UTC 
The validating recursor in Hickory DNS hickory-recursor 0.25.0 through 0.26.0-alpha.1, hickory-resolver 0.26.0-alpha.1 before 0.26.2, and hickory-net 0.26.0-beta.1 before 0.26.2 caches DNSSEC-bogus answers using the untrusted, attacker-supplied record TTL (capped at 24 hours) instead of a short validation-failure TTL. A remote attacker who spoofs a single authoritative response with an invalid signature and a long TTL can keep the bogus result cached for up to 24 hours.
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