Bug 2568736 (CVE-2026-123590) - CVE-2026-123590 hickory-net: hickory-proto: Hickory DNS: Denial of service via forged DNSSEC nonexistence proofs
Summary: CVE-2026-123590 hickory-net: hickory-proto: Hickory DNS: Denial of service vi...
Keywords:
Status: NEW
Alias: CVE-2026-123590
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
medium
medium
Target Milestone: ---
Assignee: Product Security DevOps Team
QA Contact:
URL:
Whiteboard:
Depends On:
Blocks:
TreeView+ depends on / blocked
 
Reported: 2026-11-08 02:01 UTC by OSIDB Bzimport
Modified: 2026-11-08 02:51 UTC (History)
15 users (show)

Fixed In Version:
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Description OSIDB Bzimport 2026-11-08 02:01:56 UTC 
Hickory DNS hickory-net 0.26.0-beta.1 before 0.26.2 and hickory-proto through 0.26.0-alpha.1 accept NSEC and NSEC3 records for DNSSEC nonexistence proofs when any other record with the same owner name passes signature validation. Attackers able to supply DNS responses can mix validly signed records with bogus same-name NSEC or NSEC3 records of different types in the authority section to forge nonexistence proofs.
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