Bug 2509643 (CVE-2026-65423)

Summary: CVE-2026-65423 open62541: open62541: Out-of-bounds write via integer overflow
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 open62541. An integer overflow in the UA_Variant arrayDimensions product computation may allow a remote attacker to trigger an out-of-bounds write. This could lead to arbitrary code execution or a denial of service (DoS).
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oVirt Team: --- RHEL 7.3 requirements from Atomic Host:
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Bug Depends On: 2509790    
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Description OSIDB Bzimport 2026-07-30 23:01:28 UTC 
An integer overflow in the UA_Variant arrayDimensions product 
computation in open62541 may allow a remote attacker to trigger an 
out-of-bounds write.