Bug 2558488

Summary: CVE-2026-19630 bind: BIND: Denial of Service via unbounded processing of crafted DNS messages [fedora-all]
Product: [Fedora] Fedora Reporter: Marco Benatto <mbenatto>
Component: bindAssignee: Petr Menšík <pemensik>
Status: MODIFIED --- QA Contact: Fedora Extras Quality Assurance <extras-qa>
Severity: high Docs Contact:
Priority: high    
Version: rawhideCC: anon.amish, dns-sig, mruprich, pemensik, zdohnal
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 19:19:54 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.
Comment 1 Fedora Update System 2026-11-05 18:51:08 UTC 
FEDORA-2026-7198802985 (bind-9.18.51^git20261102.973d8646-1.fc45) has been submitted as an update to Fedora 45.
https://bodhi.fedoraproject.org/updates/FEDORA-2026-7198802985
Comment 2 Fedora Update System 2026-11-05 18:51:20 UTC 
FEDORA-2026-cf9d4ec5e6 (bind-9.18.51^git20261102.973d8646-3.fc44) has been submitted as an update to Fedora 44.
https://bodhi.fedoraproject.org/updates/FEDORA-2026-cf9d4ec5e6