Bug 2540321 (CVE-2026-96746)

Summary: CVE-2026-96746 mongo-c-driver: mongo-c-driver: Denial of Service via out-of-bounds write in connection monitoring
Product: [Other] Security Response Reporter: OSIDB Bzimport <bzimport>
Component: vulnerabilityAssignee: Product Security <prodsec-ir-bot>
Status: NEW --- QA Contact:
Severity: medium Docs Contact:
Priority: medium    
Version: unspecifiedKeywords: Security
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Hardware: All   
OS: Linux   
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A flaw was found in the MongoDB C Driver. An unauthenticated remote attacker who controls network name resolution and server responses for hosts specified in a client's connection string can trigger an out-of-bounds write in the connection-monitoring logic. By delivering manipulated responses, the attacker can write data beyond the allocated memory buffer, leading to a Denial of Service (DoS) through an application crash.
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oVirt Team: --- RHEL 7.3 requirements from Atomic Host:
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Bug Depends On: 2540667, 2540668    
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Description OSIDB Bzimport 2026-09-24 16:20:34 UTC 
An out-of-bounds write in the connection-monitoring logic of the MongoDB C Driver may allow an unauthenticated party who controls name resolution and the responses of the hosts named in a client's connection string to write beyond the end of a heap buffer. This may cause the application using the driver to terminate unexpectedly.