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CVE-2025-41238 is a heap-based buffer overflow vulnerability in the PVSCSI (Paravirtualized SCSI) controller implementation used by VMware ESXi, Workstation, and Fusion. The flaw results from improper validation of the length of user-supplied data before it is copied into a heap-based buffer, leading to an out-of-bounds write in the virtual device implementation. A malicious actor with local administrative privileges inside a guest virtual machine can exploit the issue to achieve code execution in the context of the virtual machine monitor process. In VMware Workstation and Fusion, successful exploitation can result in execution on the underlying host system. In ESXi, exploitation is reported as contained by the VMX sandbox and only exploitable in unsupported configurations.
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What an attacker gets, and what they’ve been doing with it.
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Patch, then assume compromise.
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No public exploit code observed for this vulnerability.
Products and vendors Mallory has correlated with this vulnerability. Open in Mallory to drill down to specific CPE configurations and version ranges.
Vendor-confirmed product mapping. Mallory continuously reconciles this list against your asset inventory.
12 sources tracked across advisories, community write-ups, and news. New activity surfaces here as Mallory finds it.
A heap overflow vulnerability in the PVSCSI controller in VMware products that could be exploited for host code execution in certain configurations.
A critical VMware vulnerability listed in the advisory as affecting multiple VMware products; the specific technical details for this CVE are not separately described in the content.
Query your assets running an affected version, and investigate the blast radius.
Every observed campaign linking this CVE to a named adversary.
Malware families riding this exploit, with evidence and IOCs.
YARA, Sigma, Snort, and vendor rules, auto-deployed to your SIEM.
Cross-references every affected SKU, including bundled OEM variants.
Community discussion across Reddit, Mastodon, and other social sources.