Bug 2568758 (CVE-2026-123575)

Summary: CVE-2026-123575 hickory-server: hickory-server: Denial of Service via incomplete request bodies
Product: [Other] Security Response Reporter: OSIDB Bzimport <bzimport>
Component: vulnerabilityAssignee: Product Security DevOps Team <prodsec-dev>
Status: NEW --- QA Contact:
Severity: high Docs Contact:
Priority: high    
Version: unspecifiedCC: rhel-process-autobot, watson-tool-maintainers
Target Milestone: ---Keywords: Security
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Hardware: All   
OS: Linux   
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A flaw was found in hickory-server. The DNS-over-HTTPS (DoH) HTTP/2 server lacks sufficient timeouts and limits when handling incomplete request bodies. A remote attacker can cause a denial of service (DoS) by establishing connections, transmitting unfinished requests, and holding the connections open to exhaust server memory.
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oVirt Team: --- RHEL 7.3 requirements from Atomic Host:
Cloudforms Team: --- Target Upstream Version:
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Description OSIDB Bzimport 2026-11-08 02:01:58 UTC
Hickory DNS before 0.26.2 contains a resource exhaustion vulnerability in its DNS-over-HTTPS HTTP/2 server that lacks sufficient timeouts or limits for incomplete request bodies. Remote attackers can open DoH connections, send incomplete request bodies, and hold connections open to exhaust server memory.