Bug 2568759 (CVE-2026-123606)
| Summary: | CVE-2026-123606 hickory-recursor: hickory-resolver: hickory-dns: Denial of Service via glueless referral amplification | ||
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| Product: | [Other] Security Response | Reporter: | OSIDB Bzimport <bzimport> |
| Component: | vulnerability-draft | Assignee: | Product Security DevOps Team <prodsec-dev> |
| Status: | NEW --- | QA Contact: | |
| Severity: | high | Docs Contact: | |
| Priority: | high | ||
| Version: | unspecified | Keywords: | Security |
| Target Milestone: | --- | ||
| Target Release: | --- | ||
| Hardware: | All | ||
| OS: | Linux | ||
| Whiteboard: | |||
| Fixed In Version: | Doc Type: | --- | |
| Doc Text: |
A flaw was found in hickory-dns. The recursor processes out-of-bailiwick Name Server (NS) referrals that lack IP address records (glue records) without enforcing a per-query work limit. A remote attacker controlling a malicious authoritative DNS server can exploit this by returning crafted referrals, forcing repetitive resolution attempts. This can lead to a Denial of Service (DoS) through recursor resource exhaustion or traffic amplification against external systems.
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Story Points: | --- |
| Clone Of: | Environment: | ||
| Last Closed: | Type: | --- | |
| Regression: | --- | Mount Type: | --- |
| Documentation: | --- | CRM: | |
| Verified Versions: | Category: | --- | |
| oVirt Team: | --- | RHEL 7.3 requirements from Atomic Host: | |
| Cloudforms Team: | --- | Target Upstream Version: | |
| Embargoed: | |||
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Description
OSIDB Bzimport
2026-11-08 02:01:58 UTC
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