Full Report
Cloud software firm VMware has issued a critical security advisory, detailing three zero-day vulnerabilities being actively exploited in the wild
Analysis Summary
This summary focuses on the documented vulnerability, CVE-2025-22224, as details for subsequent flaws were truncated in the provided text.
# Vulnerability: VMware ESXi/Workstation Heap Overflow (TOCTOU)
## CVE Details
- CVE ID: CVE-2025-22224
- CVSS Score: 9.3 (Severe)
- CWE: (Inferred: CWE likely related to TOCTOU or Heap Overflow)
## Affected Systems
- Products: VMware ESXi, VMware Workstation
- Versions: Not explicitly listed in the provided text, but all affected customers are urged to patch.
- Configurations: Exploitation requires a malicious actor with local administrative privileges on a virtual machine (VM).
## Vulnerability Description
This vulnerability is a Time-of-Check Time-of-Use (TOCTOU) issue manifesting as a heap-overflow in the affected products. Successful exploitation allows a local attacker, who has administrative access within a virtual machine, to potentially execute code as the virtual machine's VMX process running on the host system (VMkernel). The VMX process handles non-critical device input/output.
## Exploitation
- Status: Actively exploited in the wild
- Complexity: Low (Implied by the active exploitation status and local access requirement, suggesting a straightforward attack path once prerequisites are met)
- Attack Vector: Local (Requires administrative access within a VM)
## Impact
- Confidentiality: High (Potential access to host system processes)
- Integrity: High (Potential ability to modify host system state)
- Availability: High (Potential denial of service or system compromise)
## Remediation
### Patches
- VMware has issued a critical security advisory urging customers to apply updates immediately. Specific fixed versions are not detailed here but are available via the vendor's support site. ([Link to apply updates](https://support.broadcom.com/web/ecx/support-content-notification/-/external/content/SecurityAdvisories/0/25390) - *Note: This URL is presented as provided in the source.*)
### Workarounds
- No workarounds were available as of the advisory date. Immediate patching is required.
## Detection
- The article does not provide specific Indicators of Compromise (IOCs). Detection efforts should focus on monitoring for suspicious activity originating from virtual machines attempting to interact with or overflow host process memory structures related to the VMX process.
## References
- Vendor advisory link: https://support.broadcom.com/web/ecx/support-content-notification/-/external/content/SecurityAdvisories/0/25390
- Source Article: infosecurity-magazine dot com/news/vmware-patch-exploited-zero-day/