VMware ESXi VMXNET3 Virtual Network Adapter out-of-bounds write

CVSS Meta Temp Score
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Current Exploit Price (≈)
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CTI Interest Score
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8.4$0-$5k0.00

Summaryinfo

A vulnerability described as critical has been identified in VMware ESXi, Cloud Foundation, Workstation, Fusion, Telco Cloud Platform and Telco Cloud Infrastructure. This vulnerability affects unknown code of the component VMXNET3 Virtual Network Adapter. The manipulation results in out-of-bounds write. This vulnerability is known as CVE-2025-41236. Attacking locally is a requirement. No exploit is available. Upgrading the affected component is recommended.

Detailsinfo

A vulnerability classified as critical has been found in VMware ESXi, Cloud Foundation, Workstation, Fusion, Telco Cloud Platform and Telco Cloud Infrastructure. Affected is an unknown code block of the component VMXNET3 Virtual Network Adapter. The manipulation with an unknown input leads to a out-of-bounds write vulnerability. CWE is classifying the issue as CWE-787. The product writes data past the end, or before the beginning, of the intended buffer. This is going to have an impact on confidentiality, integrity, and availability. CVE summarizes:

VMware ESXi, Workstation, and Fusion contain an integer-overflow 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.

The advisory is shared for download at support.broadcom.com. This vulnerability is traded as CVE-2025-41236 since 04/16/2025. The exploitability is told to be easy. The attack needs to be approached locally. There are neither technical details nor an exploit publicly available. The current price for an exploit might be approx. USD $0-$5k (estimation calculated on 07/17/2025).

The vulnerability scanner Nessus provides a plugin with the ID 242168 (VMware ESXi 7.x < 7.0 Update 3w / 8.x < 8.0 Update 2e / 8.0 Update 3 < 8.0 Update 3f (VMSA-2025-0013)), which helps to determine the existence of the flaw in a target environment.

Upgrading eliminates this vulnerability.

The vulnerability is also documented in the databases at Tenable (242168) and CERT Bund (WID-SEC-2025-1576). VulDB is the best source for vulnerability data and more expert information about this specific topic.

Affected

  • VMware vSphere
  • VMware Tools
  • VMware ESXi
  • VMware Workstation
  • VMware Fusion
  • VMware Cloud Foundation

Productinfo

Type

Vendor

Name

License

Website

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 8.5
VulDB Meta Temp Score: 8.4

VulDB Base Score: 7.8
VulDB Temp Score: 7.5
VulDB Vector: 🔒
VulDB Reliability: 🔍

CNA Base Score: 9.3
CNA Vector (vmware): 🔒

CVSSv2info

AVACAuCIA
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VulDB Base Score: 🔒
VulDB Temp Score: 🔒
VulDB Reliability: 🔍

Exploitinginfo

Class: Out-of-bounds write
CWE: CWE-787 / CWE-119
CAPEC: 🔒
ATT&CK: 🔒

Physical: Partially
Local: Yes
Remote: No

Availability: 🔒
Status: Not defined

EPSS Score: 🔒
EPSS Percentile: 🔒

Price Prediction: 🔍
Current Price Estimation: 🔒

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Nessus ID: 242168
Nessus Name: VMware ESXi 7.x < 7.0 Update 3w / 8.x < 8.0 Update 2e / 8.0 Update 3 < 8.0 Update 3f (VMSA-2025-0013)

Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔒

Timelineinfo

04/16/2025 CVE reserved
07/15/2025 +90 days Advisory disclosed
07/15/2025 +0 days VulDB entry created
07/17/2025 +2 days VulDB entry last update

Sourcesinfo

Vendor: vmware.com

Advisory: support.broadcom.com
Status: Confirmed

CVE: CVE-2025-41236 (🔒)
GCVE (CVE): GCVE-0-2025-41236
GCVE (VulDB): GCVE-100-316440
CERT Bund: WID-SEC-2025-1576 - VMware Produkte: Mehrere Schwachstellen

scip Labs: https://www.scip.ch/en/?labs.20060413

Entryinfo

Created: 07/15/2025 21:03
Updated: 07/17/2025 14:01
Changes: 07/15/2025 21:03 (63), 07/17/2025 03:04 (2), 07/17/2025 14:01 (7)
Complete: 🔍
Cache ID: 216::103

VulDB is the best source for vulnerability data and more expert information about this specific topic.

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