Bug 2420217 (CVE-2025-62408)

Summary: CVE-2025-62408 c-ares: c-ares: Denial of Service due to query termination after maximum attempts
Product: [Other] Security Response Reporter: OSIDB Bzimport <bzimport>
Component: vulnerabilityAssignee: Product Security DevOps Team <prodsec-dev>
Status: NEW --- QA Contact:
Severity: medium Docs Contact:
Priority: medium    
Version: unspecifiedCC: caswilli, kaycoth, kshier, stcannon, teagle, yguenane
Target Milestone: ---Keywords: Security
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Hardware: All   
OS: Linux   
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A flaw was found in c-ares. This vulnerability allows a Denial of Service (DoS) via terminating a query after maximum attempts when using `read_answer()` and `process_answer()` functions.
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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: 2421305, 2421306, 2421301, 2421302, 2421303, 2421304, 2421307    
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Description OSIDB Bzimport 2025-12-08 23:01:19 UTC
c-ares is an asynchronous resolver library. Versions 1.32.3 through 1.34.5  terminate a query after maximum attempts when using read_answer() and process_answer(), which can cause a Denial of Service. This issue is fixed in version 1.34.6.