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.
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| VMware | Cloud Foundation | 9.1.x.x, 9.0.x.x, 5.x | — |
| VMware | vSphere Foundation | 9.1.x.x, 9.0.x.x | — |
| VMware | ESX | 9.1.x.x – < ESXi-9.1.0.0200-25557999, 9.0.x.x – < ESXi-9.0.2.0100-25595025, 8.0 – < ESXi80U3k-25595708 | ESXi-9.1.0.0200-25557999 |
| VMware | Telco Cloud Platform | 5.1.x, 5.0.x | — |
Advisories 2
- WID-SEC-2026-2569 VMware Produkte: Mehrere Schwachstellen BSI CERT-Bund (WID) · Oct 28, 2026
- NCSC-2026-0269 Kwetsbaarheden verholpen in VMware producten NCSC-NL (Netherlands) · Jul 29, 2026