CVE-2026-47876

VMXNET3 out-of-bounds write vulnerability

Published Jul 30, 2026 CVSS 3.1 · 9.3 Critical EPSS < 1% KEV · Not listed
Description
VMware 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.

Remediation

No solution or workaround provided in the CVE record

Tracking

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Advisories

No advisories available
History
Type Values Removed Values Added
First Time appeared Vmware
Vmware cloud Foundation
Vmware esx
Vmware telco Cloud Platform
Vmware vsphere Foundation
Vendors & Products Vmware
Vmware cloud Foundation
Vmware esx
Vmware telco Cloud Platform
Vmware vsphere Foundation
Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'total'}, 'version': '2.0.3'}

Type Values Removed Values Added
Description VMware 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.
Title VMXNET3 out-of-bounds write vulnerability
Weaknesses CWE-787
References
Metrics cvssV3_1

{'score': 9.3, 'vector': 'CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H'}

Weaknesses

Sources

Status
PUBLISHED
Assigner
vmware
Published
Updated
Jul 30, 2026, 1:02 PM
Reserved
May 20, 2026, 10:00 AM
Status
Awaiting Analysis
Published
Jul 30, 2026, 1:16 PM
Modified
Jul 30, 2026, 2:16 PM