Medium severity · published Jun 25, 2020
CVE-2020-3971
VMware ESXi (6.7 before ESXi670-201904101-SG and 6.5 before ESXi650-201907101-SG), Workstation (15.x before 15.0.2), and Fusion (11.x before 11.0.2) contain a heap overflow…
5.5
CVSS
0.3%
EPSS
No
On KEV
Description
VMware ESXi (6.7 before ESXi670-201904101-SG and 6.5 before ESXi650-201907101-SG), Workstation (15.x before 15.0.2), and Fusion (11.x before 11.0.2) contain a heap overflow vulnerability in the vmxnet3 virtual network adapter. A malicious actor with local access to a virtual machine with a vmxnet3 network adapter present may be able to read privileged information contained in physical memory.
CVSS vector
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N
Attack vector
Local
Complexity
Low
Privileges
Low
User interaction
None
Confidentiality
High
Integrity
None
Availability
None
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.3% · higher than 28% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
ES
ESXi · VMware
6.5; 6.5; 6.5; 6.5; 6.5; 6.5; +34 more · source: NVD
CF
Cloud Foundation · Vmware
3.0 before 3.7.2 · source: NVD
FU
Fusion · Vmware
11.0.0 before 11.0.2 · source: NVD
WO
Workstation · Vmware
15.0.0 before 15.0.2 · source: NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2020-3971
CVE.org
https://www.cve.org/CVERecord?id=CVE-2020-3971
Vendor Advisory
https://www.vmware.com/security/advisories/VMSA-2020-0015.html
More from ESXi
9.8
CVE-2020-3992
VMware ESXi OpenSLP Use-After-Free Vulnerability
9.8
CVE-2019-5544
VMware ESXi and Horizon DaaS OpenSLP Heap-Based Buffer Overflow Vulnerability
8.2
CVE-2025-22225
VMware ESXi Arbitrary Write Vulnerability
8.2
CVE-2025-22224
VMware ESXi and Workstation TOCTOU Race Condition Vulnerability
7.8
CVE-2010-3904
Linux Kernel Improper Input Validation Vulnerability
