CVE-2020-27173: Vm-Superio Project Vm-Superio

High severity, CVSS 7.5. EPSS: 1.5% chance of exploitation in the next 30 days.

In vm-superio before 0.1.1, the serial console FIFO can grow to unlimited memory usage when data is sent to the input source (i.e., standard input). This behavior cannot be reproduced from the guest side. When no rate limiting is in place, the host can be subject to memory pressure, impacting all other VMs running on the same host.

Affected products

• Vm-Superio Project Vm-Superio: before 0.1.1 (fixed in 0.1.1)

Published 2020-10-16. Last modified 2026-06-17.