A regression exists in the Linux Kernel within KVM: nVMX that allowed for speculative execution attacks. L2 can carry out Spectre v2 attacks on L1 due to L1 thinking it doesnt need retpolines or IBPB after running L2 due to KVM (L0) advertising eIBRS support to L1. An attacker at L2 with code execution can execute code on an indirect branch on the host machine. We recommend upgrading to Kernel 6.2 or past commit 2e7eab81425a
The product initializes or sets a resource with a default that is intended to be changed by the administrator, but the default is not secure.
| Name | Vendor | Start Version | End Version |
|---|---|---|---|
| Linux_kernel | Linux | 5.4.47 (including) | 5.4.233 (excluding) |
| Linux_kernel | Linux | 5.6.19 (including) | 5.7 (excluding) |
| Linux_kernel | Linux | 5.7.3 (including) | 5.10.170 (excluding) |
| Linux_kernel | Linux | 5.11 (including) | 5.15.96 (excluding) |
| Linux_kernel | Linux | 5.16 (including) | 6.1.14 (excluding) |
Developers often choose default values that leave the product as open and easy to use as possible out-of-the-box, under the assumption that the administrator can (or should) change the default value. However, this ease-of-use comes at a cost when the default is insecure and the administrator does not change it.