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CVE-2020-27173

HIGH
7.5
CVSS Score
Published: October 16, 2020 at 03:58 AM UTC
Updated: June 17, 2026 at 03:08 AM UTC
1 product affected across 1 vendorVm Superio

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Severity
HIGH7.5
Exploit prediction
EPSS 2%

Description

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

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

Vm Superio· Vm Superio Project
95%
v < 0.1.1
Affected range stops below 0.1.1, so it looks safe — our inference, not a vendor statement

Remediation

No guide yet

No remediation guidance has been written for this CVE yet. What the record does show:

Patch and advisory references

References (2)

x_refsource_MISCThird Party Advisory
Source: [email protected]
https://github.com/rust-vmm/vm-superio/issues/17
x_refsource_MISCPatchThird Party Advisory
Source: [email protected]
https://github.com/rust-vmm/vm-superio/pull/19

CVSS

7.5HIGH[email protected]
Attack Vector
NETWORK
Complexity
LOW
Privileges
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
NONE
Integrity
NONE
Availability
HIGH
Vector?

Quick Info

StatusMODIFIED
CWE
CWE-770

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