Vulnerability Bulletins


System information

Affected software AmazonWS


Publication Date: 07/28/2023 3:30PM PDT AWS is aware of CVE-2023-20593, otherwise known as "Zenbleed", and can confirm this issue affected AMD “Zen 2”, also known as “Rome”, CPUs that power the C5a, C5ad, G4ad, and G5 instance families. Because of the design of the EC2 Nitro hypervisor, there is no risk of cross-instance data access. The updated microcode from AMD has been applied to all C5a, C5ad, G4ad, and G5 instances. No action is required from customers

More info:

Standar resources

Property Value
CVE CVE-2023-20593.

Version history

Version Comments Date
1.0 Advisory issued 2023-07-30
Ministerio de Defensa
Presidencia española. Consejo de la Unión Europea