NVIDIA vGPU Manager (vGPU plugin): Time-of-check to time-of-use on a shared resource between guest and host plugin. A

Impact

Time-of-check to time-of-use on a shared resource between guest and host plugin. A tenant that wins the race gets host-side information disclosure or crashes the shared GPU. vGPU 8.x before 8.4, 9.x before 9.4, 10.x before 10.3.

Who can reach it

Any unprivileged user inside a guest VM with a vGPU.

What to do

Upgrade the vGPU Manager on the hypervisor host to the fixed vGPU release. The host component is a kernel module inside the hypervisor, so this is a full node drain: evacuate or power off every tenant VM on the host, upgrade, reboot the host. Guest drivers must be kept within the supported version skew and updated per VM (guest reboot). No VBIOS flash, but expect a maintenance window per host and a matching hypervisor-vendor package (VMware/Citrix/KVM/Nutanix builds ship separately).

References

Related entries

• NVIDIA vGPU Manager (vGPU plugin): The plugin keeps using a resource it validated after the guest has changed it - aCVE-2021-1061 · NVIDIA vGPU Manager (vGPU plugin)Medium
• NVIDIA vGPU Manager (vGPU plugin): A guest VM hands the vGPU Manager a wrongly sized buffer and drives the host into anCVE-2019-5696 · NVIDIA vGPU Manager (vGPU plugin)Medium
• NVIDIA vGPU Manager (vGPU plugin): Unvalidated guest-supplied index in the vGPU plugin. A tenant VM crashes the hostCVE-2020-5959 · NVIDIA vGPU Manager (vGPU plugin)Medium
• NVIDIA vGPU Manager (vGPU plugin): Guest-supplied size not validated in the vGPU pluginCVE-2020-5986 · NVIDIA vGPU Manager (vGPU plugin)Medium
• NVIDIA vGPU Manager (vGPU plugin): NULL dereference in the vGPU plugin reachable from a guest - one tenant crashes theCVE-2020-5989 · NVIDIA vGPU Manager (vGPU plugin)Medium
• NVIDIA vGPU Manager (vGPU plugin): Unvalidated guest input causes unbounded resource consumption on the host, so oneCVE-2021-1066 · NVIDIA vGPU Manager (vGPU plugin)Medium