Advisoriesby IbisVMwareCVE-2026-47876
VMware Cloud Foundation: out-of-bounds write
Fix: upgrade to ESXi-9.1.0.0200-25557999 or later (3 fixed versions below)
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 versions
| Package | Affected | Fixed in |
|---|---|---|
| Cloud Foundation Product | <= 9.1.x.x | No fix yet |
| <= 9.0.x.x | No fix yet | |
| <= 5.x | No fix yet | |
| ESX Product | >= 9.1.x.x, < ESXi-9.1.0.0200-25557999 | ESXi-9.1.0.0200-25557999 |
| >= 9.0.x.x, < ESXi-9.0.2.0100-25595025 | ESXi-9.0.2.0100-25595025 | |
| >= 8.0, < ESXi80U3k-25595708 | ESXi80U3k-25595708 | |
| Telco Cloud Platform Product | <= 5.1.x | No fix yet |
| <= 5.0.x | No fix yet | |
| vSphere Foundation Product | <= 9.1.x.x | No fix yet |
| <= 9.0.x.x | No fix yet |
Details and references
- CVSS 3.1
- CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H
- Severity from
- the vendor (its own CVE record or advisory)
- Weakness
- CWE-787