What is CVE-2017-4938?

CVE-2017-4938 is a medium-severity vulnerability in VMware Fusion, classified under NULL Pointer Dereference. CVSS score: 6.5/10. Published 2017-11-17.

How severe is CVE-2017-4938?

Medium severity. CVSS v3 base score is 6.5 out of 10.

NULL pointer dereference in VMware Fusion

CVE-2017-4938

VMware Workstation (12.x before 12.5.8) and Fusion (8.x before 8.5.9) contain a guest RPC NULL pointer dereference vulnerability. Successful exploitation of this issue may allow attackers with normal user privileges to crash their VMs.

Published 2017-11-17 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 6.5 (Medium). Vector: CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:C/C:N/I:N/A:H.

EPSS exploit prediction

EPSS: 0.004 (28.1th percentile), scored 2026-10-01.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 28th percentile — 28.1% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.004 · newest: 0.004 · change: 0.000

Affected products

VMware Fusion — versions 8.x before 8.5.9, 8.5.2, 8.5.0
VMware Workstation — versions 12.5, 12.0.0, 12.5.7

Weakness classification (CWE)

CWE-476 — NULL Pointer Dereference

References

www.vmware.com/security/advisories/VMSA-2017-0018.html (Patch, Vendor Advisory)
www.securitytracker.com/id/1039835 (VDB Entry, Third Party Advisory, vdb-entry)
www.securityfocus.com/bid/101887 (VDB Entry, Third Party Advisory, vdb-entry)

Frequently asked questions

What is CVE-2017-4938?: CVE-2017-4938 is a medium-severity vulnerability in VMware Fusion, classified under NULL Pointer Dereference. CVSS score: 6.5/10. Published 2017-11-17.
How severe is CVE-2017-4938?: Medium severity. CVSS v3 base score is 6.5 out of 10.