VMXNET3 out-of-bounds write vulnerability

MITRE NVD CVE.ORG JSON API

Summary

CVECVE-2026-47876
StatePUBLISHED
Assignervmware
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-07-30 13:16:51 UTC
Updated2026-07-30 14:16:58 UTC
DescriptionVMware ESX contains an out-of-bounds write vulnerability in the VMXNET3 virtual network adapter. A malicious actor with local administrative privileges on a virtual machine with VMXNET3 virtual network adapter may exploit this issue to execute code on the host. Non VMXNET3 virtual adapters are not affected by this issue.

Risk And Classification

Primary CVSS: v3.1 9.3 CRITICAL from [email protected]

CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H

EPSS: 0.002810000 probability, percentile 0.204040000 (date 2026-07-31)

Problem Types: CWE-787 | CWE-787 CWE-787 Out-of-bounds write

VersionSourceTypeScoreSeverityVector
3.1[email protected]Secondary9.3CRITICALCVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H
3.1CNACVSS9.3CRITICALCVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H

CVSS v3.1 Breakdown

Attack Vector
Local
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
Changed
Confidentiality
High
Integrity
High
Availability
High

CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA VMware Cloud Foundation affected 9.1.x.x Not specified
CNA VMware Cloud Foundation affected 9.0.x.x Not specified
CNA VMware Cloud Foundation affected 5.x Not specified
CNA VMware VSphere Foundation affected 9.1.x.x Not specified
CNA VMware VSphere Foundation affected 9.0.x.x Not specified
CNA VMware ESX affected 9.1.x.x ESXi-9.1.0.0200-25557999 custom Not specified
CNA VMware ESX affected 9.0.x.x ESXi-9.0.2.0100-25595025 custom Not specified
CNA VMware ESX affected 8.0 ESXi80U3k-25595708 custom Not specified
CNA VMware Telco Cloud Platform affected 5.1.x Not specified
CNA VMware Telco Cloud Platform affected 5.0.x Not specified

References

ReferenceSourceLinkTags
support.broadcom.com/web/ecx/support-content-notification/-/external/content/Secur... [email protected] support.broadcom.com
CVE Program record CVE.ORG www.cve.org canonical
NVD vulnerability detail NVD nvd.nist.gov canonical, analysis

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