VMware ESXi, and Workstation contain a TOCTOU (Time-of-Check Time-of-Use) vulnerability that leads to an out-of-bounds write. A malicious actor with local administrative privileges on a virtual machine may exploit this issue to execute code as the virtual machine's VMX process running on the host.
Actively exploited: CISA added it to its Known Exploited Vulnerabilities catalog on 4 Mar 2025.
Severity
High 8.2
Published
4 Mar 2025
Last changed
17 Jun 2026
Added to UpHeron
1 Nov 2026
Sources
NVD
Affected software
Software
Affected versions
VMware ESXiServers and applications · cpe:o:vmware:esxi
Version 8.0-update_3
Version 8.0-update_2
Version 8.0-update_1d
Version 8.0-update_1
All 43 release lines
Version 7.0-beta
Version 7.0-update_1a
Version 7.0-update_1b
Version 7.0-update_1c
Version 7.0-update_2a
Version 7.0-update_2c
Version 7.0-update_3c
Version 7.0
Version 7.0-update_1
Version 7.0-update_1d
Version 7.0-update_1e
Version 7.0-update_2
Version 7.0-update_2d
Version 7.0-update_2e
Version 7.0-update_3
Version 7.0-update_3d
Version 7.0-update_3e
Version 7.0-update_3f
Version 7.0-update_3g
Version 7.0-update_3i
Version 7.0-update_3j
Version 7.0-update_3k
Version 7.0-update_3l
Version 7.0-update_3m
Version 7.0-update_3n
Version 7.0-update_3o
Version 7.0-update_3p
Version 7.0-update_3q
Version 7.0-update_3r
Version 8.0-a
Version 8.0-b
Version 8.0-c
Version 8.0-update_1a
Version 8.0-update_1c
Version 8.0-update_2b
Version 8.0-update_2c
Version 8.0-update_3b
Version 8.0-update_3c
Version 8.0
Version 8.0-update_1
Version 8.0-update_1d
Version 8.0-update_2
Version 8.0-update_3
Known exploited
CISA name
VMware ESXi and Workstation TOCTOU Race Condition Vulnerability
Required action
Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.