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CVE-2025-22224: VMware ESXi and Workstation TOCTOU Race Condition Vulnerability

criticalknown exploitedCVE-2025-22224
Actively exploited. At least one CVE in this advisory is listed in the CISA Known Exploited Vulnerabilities catalog — exploitation has been observed in the wild. Treat remediation as urgent.
VMware ESXi and Workstation contain a time-of-check time-of-use (TOCTOU) race condition vulnerability that leads to an out-of-bounds write. Successful exploitation enables an attacker with local administrative privileges on a virtual machine to execute code as the virtual machine's VMX process running on the host.

CSIRTS triage

vendor: VMwareproduct: ESXi and WorkstationOther
What
A TOCTOU race condition vulnerability leads to an out-of-bounds write, allowing code execution as the VMX process.
Who is affected
Users with local administrative privileges on a virtual machine running VMware ESXi or Workstation.
Urgency
Critical urgency for remediation due to active exploitation and high severity.
Action
Apply the latest security updates provided by VMware.

AI-assisted analysis generated from the source advisory — verify against the original.

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Details

Source
CISA Known Exploited Vulnerabilities (US · database · site)
Severity
critical
Published
2025-03-04
Exploitation
Observed in the wild (CISA KEV)

Original advisory: https://nvd.nist.gov/vuln/detail/CVE-2025-22224

Exploitation outlook

EPSS (FIRST.org) estimates each CVE’s probability of exploitation in the next 30 days — here is the CSIRTS.com read on those numbers.

Referenced CVEs

CVECSIRTS overviewExternal
CVE-2025-22224coverage & exploitation statusNVD · CVE.org

Recent advisories for VMware ESXi and

A cluster of recent advisories against the same product widens the attack surface — attackers routinely chain freshly published CVEs on one product, so review these together.

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