Bug 2460666 (CVE-2026-33595)

Summary: CVE-2026-33595 dnsdist: DoQ/DoH3 excessive memory allocation
Product: [Other] Security Response Reporter: OSIDB Bzimport <bzimport>
Component: vulnerabilityAssignee: Product Security <prodsec-ir-bot>
Status: NEW --- QA Contact:
Severity: high Docs Contact:
Priority: high    
Version: unspecifiedKeywords: Security
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Hardware: All   
OS: Linux   
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A flaw was found in PowerDNS DNSdist. A client can trigger excessive memory allocation by generating a lot of errors responses over a single DoQ and DoH3 connection, as some resources were not properly released until the end of the connection.
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oVirt Team: --- RHEL 7.3 requirements from Atomic Host:
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Bug Depends On: 2460840, 2460841    
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Description OSIDB Bzimport 2026-04-22 15:04:10 UTC
A client can trigger excessive memory allocation by generating a lot of errors responses over a single DoQ and DoH3 connection, as some resources were not properly released until the end of the connection.