Bug 2558487

Summary: CVE-2026-19630 dhcp: BIND: Denial of Service via unbounded processing of crafted DNS messages [fedora-all]
Product: [Fedora] Fedora Reporter: Marco Benatto <mbenatto>
Component: dhcpAssignee: Martin Osvald 🛹 <mosvald>
Status: NEW --- QA Contact: Fedora Extras Quality Assurance <extras-qa>
Severity: high Docs Contact:
Priority: high    
Version: rawhideCC: fhrdina, jorton, mosvald, pavel, pemensik
Target Milestone: ---Keywords: Security, SecurityTracking
Target Release: ---   
Hardware: Unspecified   
OS: Unspecified   
Whiteboard: {"flaws": ["72ce7c93-f4d2-4b2f-85d3-2237d84c0083"]}
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oVirt Team: --- RHEL 7.3 requirements from Atomic Host:
Cloudforms Team: --- Target Upstream Version:
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Bug Depends On:    
Bug Blocks: 2556406    

Description Marco Benatto 2026-10-21 19:19:31 UTC 
Disclaimer: Community trackers are created by Red Hat Product Security team on a best effort basis. Package maintainers are required to ascertain if the flaw indeed affects their package, before starting the update process.

In a BIND resolver, inbound DNS protocol messages with a particular structure will result in additional processing, with no limit imposed by BIND. A DNS message with a maliciously large number of such structures will cause BIND to consume disproportionate amounts of CPU time and memory during processing.