Heap-based buffer overflow in VMware ESXi - CVE-2025-41238
Published: July 17, 2025
Vulnerability identifier: #VU113008
CSH Severity: Medium
CVSS v4.0: CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:L/VI:L/VA:L/SC:H/SI:H/SA:H/E:U/U:Green
CVE-ID: CVE-2025-41238
CWE-ID: CWE-122
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vendor: VMware, Inc
Affected software:
VMware ESXi
VMware ESXi
Detailed vulnerability description
The vulnerability allows an attacker to compromise the host OS.
The vulnerability exists due to a boundary error in the PVSCSI (Paravirtualized SCSI) controller. A malicious guest with local administrative privileges on a virtual machine can trigger a heap-based buffer overflow and execute arbitrary code as the virtual machine's VMX process running on the host.
How to mitigate CVE-2025-41238
Install updates from vendor's website.