Bug 2568806 (CVE-2026-123589) - CVE-2026-123589 hickory-server: hickory-server: Denial of Service via missing DNS-over-QUIC request timeout
Summary: CVE-2026-123589 hickory-server: hickory-server: Denial of Service via missing...
Keywords:
Status: NEW
Alias: CVE-2026-123589
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 02:06 UTC by OSIDB Bzimport
Modified: 2026-11-08 03:20 UTC (History)
2 users (show)

Fixed In Version:
Clone Of:
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Description OSIDB Bzimport 2026-11-08 02:06:17 UTC 
The DNS-over-QUIC (DoQ) server in hickory-server (hickory-dns) before 0.26.2 does not apply any timeout when reading a request message from a QUIC stream, bypassing all configured timeouts. A remote unauthenticated client can open a connection and a request stream and hold it open indefinitely, consuming server resources and causing a denial of service.
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