CVE-2026-22716: VMware Workstation Privilege Escalation

CVE-2026-22716 Overview

CVE-2026-22716 is an out-of-bounds write vulnerability affecting VMware Workstation version 25H1 and earlier across all supported platforms. This memory corruption flaw allows an attacker with non-administrative privileges on a guest virtual machine to trigger termination of certain Workstation processes on the host system, potentially disrupting virtualization operations and system stability.

Critical Impact

Guest VM users without administrative privileges can exploit this vulnerability to terminate host Workstation processes, potentially causing denial of service conditions and disruption of virtual machine operations.

Affected Products

• VMware Workstation 25H1 and earlier versions
• All supported platforms (Windows, Linux)
• Guest VMs with non-administrative user access

Discovery Timeline

• 2026-02-27 - CVE-2026-22716 published to NVD
• 2026-03-02 - Last updated in NVD database

Technical Details for CVE-2026-22716

Vulnerability Analysis

This vulnerability falls under CWE-787 (Out-of-bounds Write), a memory corruption vulnerability class where an application writes data past the boundaries of an allocated memory buffer. In the context of VMware Workstation, the flaw exists in the handling of operations between the guest VM and host processes.

The vulnerability requires local access, meaning an attacker must have a presence within a guest virtual machine. While user interaction is required for exploitation, the attack can cross security boundaries (Changed scope), affecting host Workstation processes from within the guest VM context. The impact is limited to integrity and availability effects, with no direct confidentiality compromise.

Root Cause

The root cause stems from improper bounds checking during memory write operations within VMware Workstation's guest-to-host communication pathways. When processing certain requests from a guest VM, the affected Workstation components fail to properly validate buffer boundaries before writing data, leading to an out-of-bounds write condition.

This type of vulnerability typically occurs when input length or offset values are not properly validated against allocated buffer sizes, allowing writes to adjacent memory regions that can corrupt process state and cause crashes.

Attack Vector

The attack vector is local, requiring an attacker to first obtain access to a guest virtual machine running on the targeted VMware Workstation installation. From within the guest VM, the attacker can leverage the out-of-bounds write condition to corrupt memory in Workstation host processes.

The exploitation scenario involves crafting specific operations or data from within the guest environment that triggers the vulnerable code path in the host Workstation process, leading to memory corruption and subsequent process termination.

Detection Methods for CVE-2026-22716

Indicators of Compromise

• Unexpected termination of VMware Workstation processes (vmware.exe, vmware-vmx.exe)
• Crash dumps or error logs indicating memory access violations in Workstation components
• Unusual activity patterns from guest VMs preceding host process crashes

Detection Strategies

• Monitor host system event logs for VMware Workstation process crashes and restarts
• Implement application crash monitoring for VMware Workstation binaries
• Track memory exception events related to Workstation processes
• Audit guest VM activity for unusual patterns that correlate with host instability

Monitoring Recommendations

• Enable enhanced logging for VMware Workstation operations
• Deploy endpoint detection and response (EDR) solutions to monitor Workstation process health
• Configure alerts for repeated Workstation process terminations
• Correlate guest VM activity logs with host process crash events

How to Mitigate CVE-2026-22716

Immediate Actions Required

• Review and apply available security updates from VMware/Broadcom
• Restrict guest VM access to trusted users only
• Monitor for abnormal guest VM behavior and Workstation process crashes
• Consider temporarily limiting untrusted workloads in guest VMs until patched

Patch Information

VMware (now under Broadcom) has issued a security advisory addressing this vulnerability. Administrators should consult the Broadcom Security Advisory for specific patch information and update VMware Workstation to a version that addresses CVE-2026-22716.

Organizations should prioritize patching based on their deployment of VMware Workstation and the potential exposure of guest VMs to untrusted users.

Workarounds

• Limit guest VM access to only trusted administrative users until patches are applied
• Implement network segmentation to isolate systems running VMware Workstation with sensitive workloads
• Monitor Workstation processes for unexpected terminations and investigate incidents promptly
• Consider using alternative virtualization solutions for untrusted workloads temporarily

# Example: Monitor VMware Workstation process health on Linux
# Add to monitoring scripts or cron jobs
pgrep -a vmware-vmx || echo "VMware VMX process not running - investigate"
journalctl -u vmware -p err --since "1 hour ago"