Bug 2453343 (CVE-2026-24028)

Summary: CVE-2026-24028 dnsdist: dnsdist and PowerDNS: Denial of service or information disclosure via crafted DNS response packet
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: unspecifiedKeywords: Security
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Hardware: All   
OS: Linux   
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A flaw was found in dnsdist and PowerDNS when custom Lua code uses newDNSPacketOverlay to parse DNS packets. A remote attacker could exploit this by sending a specially crafted DNS response packet, leading to an out-of-bounds read. This vulnerability might cause a system crash, resulting in a denial of service, or allow access to unrelated memory, potentially leading to information disclosure.
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oVirt Team: --- RHEL 7.3 requirements from Atomic Host:
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Bug Depends On: 2453420, 2453431, 2453432    
Bug Blocks:    

Description OSIDB Bzimport 2026-03-31 13:01:56 UTC 
An attacker might be able to trigger an out-of-bounds read by sending a crafted DNS response packet, when custom Lua code uses newDNSPacketOverlay to parse DNS packets. The out-of-bounds read might trigger a crash, leading to a denial of service, or access unrelated memory, leading to potential information disclosure.