Bug 2494150

Summary: CVE-2026-5950 bind: Unbounded resend loop in BIND 9 resolver [fedora-all]
Product: [Fedora] Fedora Reporter: Michal Findra <mfindra>
Component: bindAssignee: Petr Menšík <pemensik>
Status: CLOSED DUPLICATE QA Contact: Fedora Extras Quality Assurance <extras-qa>
Severity: medium Docs Contact:
Priority: medium    
Version: rawhideCC: anon.amish, dns-sig, mruprich, pemensik, zdohnal
Target Milestone: ---Keywords: Security, SecurityTracking
Target Release: ---   
Hardware: Unspecified   
OS: Unspecified   
Whiteboard: {"flaws": ["3a57759e-d813-4edc-9988-1fb706ca924a"]}
Fixed In Version: bind-9.18.49-1.fc45 bind-9.18.49-1.fc44 bind-9.18.49-1.fc43 Doc Type: ---
Doc Text:
Story Points: ---
Clone Of: Environment:
Last Closed: 2026-07-14 14:25:31 UTC Type: ---
Regression: --- Mount Type: ---
Documentation: --- CRM:
Verified Versions: Category: ---
oVirt Team: --- RHEL 7.3 requirements from Atomic Host:
Cloudforms Team: --- Target Upstream Version:
Embargoed:
Bug Depends On:    
Bug Blocks: 2479773    

Description Michal Findra 2026-06-29 11:30:53 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.

An unbounded resend loop vulnerability exists in the BIND 9 resolver state machine during bad-server handling, enabling a remote unauthenticated attacker to cause severe resource exhaustion by sending queries that trigger specific retry conditions.
Comment 1 Petr Menšík 2026-07-14 14:25:31 UTC 

*** This bug has been marked as a duplicate of bug 2480121 ***