Bug 2499821 (CVE-2026-51539)

Summary: CVE-2026-51539 libmodbus: libmodbus: Denial of Service via improper timeout management in network read operations
Product: [Other] Security Response Reporter: OSIDB Bzimport <bzimport>
Component: vulnerabilityAssignee: Product Security DevOps Team <prodsec-dev>
Status: NEW --- QA Contact:
Severity: high Docs Contact:
Priority: high    
Version: unspecifiedKeywords: Security
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Hardware: All   
OS: Linux   
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A flaw was found in libmodbus. This Denial of Service (DoS) vulnerability exists in the receive loop when the software is running on Windows. The issue is caused by improper timeout management during network read operations, which can allow a remote attacker to cause the application to become unresponsive.
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Description OSIDB Bzimport 2026-07-13 22:02:09 UTC
A Denial of Service (DoS) vulnerability exists in the receive loop of libmodbus 3.1.12 when running on Windows. The issue stems from improper timeout management during network read operations.