NVIDIA vGPU Manager (vGPU plugin): The vGPU Manager trusts a length field in a guest request that does not match the

Impact

The vGPU Manager trusts a length field in a guest request that does not match the actual input. A malicious tenant lies about the size and gets host-side disclosure, tampering or a shared-GPU outage. vGPU 12.x before 12.3, 11.x before 11.5, 8.x before 8.8.

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

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