CVE-2023-20900: Debian Linux

High severity, CVSS 7.5. EPSS: 1.5% chance of exploitation in the next 30 days.

A malicious actor that has been granted Guest Operation Privileges https://docs.vmware.com/en/VMware-vSphere/8.0/vsphere-security/GUID-6A952214-0E5E-4CCF-9D2A-90948FF643EC.html  in a target virtual machine may be able to elevate their privileges if that target virtual machine has been assigned a more privileged Guest Alias https://vdc-download.vmware.com/vmwb-repository/dcr-public/d1902b0e-d479-46bf-8ac9-cee0e31e8ec0/07ce8dbd-db48-4261-9b8f-c6d3ad8ba472/vim.vm.guest.AliasManager.html .

Affected products

• Debian Debian Linux: version 10.0 only; version 11.0 only; version 12.0 only
• Fedoraproject Fedora: version 37 only; version 38 only; version 39 only
• Netapp Ontap Select Deploy Administration Utility: affected versions not specified
• VMware Open Vm Tools: from 10.3.0, before 12.3.0 (fixed in 12.3.0)
• VMware Tools: from 10.3.0, before 12.3.0 (fixed in 12.3.0); from 10.3.0, before 10.3.26 (fixed in 10.3.26)

Published 2023-08-31. Last modified 2026-10-08.