• VMware ESXi
• VMware Cloud Foundation (Cloud Foundation) 

Multiple side-channel vulnerabilities in Intel (CVE-2022-29901, CVE-2022-28693, CVE-2022-26373) and AMD (CVE-2022-23816, CVE-2022-23825) CPUs have been disclosed. Patches are available to mitigate these vulnerabilities in affected VMware products.

VMware ESXi contains Return-Stack-Buffer-Underflow (CVE-2022-29901, CVE-2022-28693, CVE-2022-26373) and Branch Type Confusion (CVE-2022-23816, CVE-2022-23825) vulnerabilities due to the Intel and AMD processors it utilizes. VMware has evaluated the severity of these issues to be in the Moderate severity range with a maximum CVSSv3 base score of 5.6.

A malicious actor with administrative access to a virtual machine can take advantage of various side-channel CPU flaws that may leak information stored in physical memory about the hypervisor or other virtual machines that reside on the same ESXi host.

To mitigate CVE-2022-29901, CVE-2022-28693, CVE-2022-23816, CVE-2022-23825, and CVE-2022-26373, apply the patches listed in the 'Fixed Version' column of the 'Resolution Matrix' found below. These patches do not introduce performance impact. VMware has created a supplemental Knowledge Base Article to assist in explaining the various questions that have been raised in regards to speculative execution mitigations in guest operating systems.

None.

A supplemental FAQ was created for additional clarification.

CVE-2022-26373 was disclosed by Intel on August 9th, 2022. VMware ESXi patches previously provided also mitigate CVE-2022-26373.

None.

ESXi70U3sf-20036586:
https://docs.vmware.com/en/VMware-vSphere/7.0/rn/vsphere-esxi-70u3f-release-notes.html
ESXi670-202207401-SG:
https://docs.vmware.com/en/VMware-vSphere/6.7/rn/esxi670-202207001.html
ESXi650-202207401-SG:
https://docs.vmware.com/en/VMware-vSphere/6.5/rn/esxi650-202207001.html

KB Articles:
VCF 4.x: https://kb.vmware.com/s/article/88695
VCF 3.x: https://kb.vmware.com/s/article/88927

FAQ:
https://via.vmw.com/vmsa-2022-0020-qna

Mitre CVE Dictionary Links:
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2022-23816
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2022-23825
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2022-28693
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2022-29901
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2022-26373

FIRST CVSSv3 Calculator:
CVE-2022-23816: https://www.first.org/cvss/calculator/3.1#CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:C/C:H/I:N/A:N
CVE-2022-23825: https://www.first.org/cvss/calculator/3.1#CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:C/C:H/I:N/A:N
CVE-2022-28693: https://www.first.org/cvss/calculator/3.1#CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:C/C:H/I:N/A:N
CVE-2022-29901: https://www.first.org/cvss/calculator/3.1#CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:C/C:H/I:N/A:N
CVE-2022-26373: https://www.first.org/cvss/calculator/3.1#CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:C/C:H/I:N/A:N

2022-07-12: VMSA-2022-0020
Initial security advisory.

2022-08-09: VMSA-2022-0020.1
Added CVE-2022-26373 to advisory in conjunction with its public disclosure by Intel. VMware ESXi patches previously provided also mitigate CVE-2022-26373.

2022-10-25: VMSA-2022-0020.2
Added supplemental Knowledge Base Article link to assist in explaining the various questions that have been raised in regards to speculative execution mitigations in guest operating systems.

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