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CVE-2020-27173

19
FAUCET Score

CVE-2020-27173 describes a denial-of-service vulnerability in vm-superio before version 0.1.1, where an unconstrained serial console FIFO can lead to unlimited memory consumption on the host system. This can be triggered by sending excessive data to the input source, impacting all other virtual machines on the same host. With a CVSS score of 7.5 (High), this vulnerability is remotely exploitable with low attack complexity, potentially causing a complete loss of availability for affected systems. There is no evidence of active exploitation, public exploit code, or significant community discussion surrounding this CVE.

Impacted Technologies

VendorProductVersion(s)CPE
< 0.1.1CPE matchmatch criteria
cpe:2.3:a:vm-superio_project:vm-superio:*:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.1

7.5HIGH

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
HIGH
Exploitability Score
3.9
Impact Score
3.6
CvssVersion
3.1

Exploit Intelligence

EPSS Score
1.53%
Probability of exploitation in next 30 days
EPSS Percentile
72.2%
Percentile rank of EPSS score among Peer Group
As of 2026-07-28
Model: v2026.06.15
This CVE's current EPSS score of 0.0153 is in the 54th percentile among its peer group of 51,553 CVEs.

Social Chatter

No social media mentions found for this CVE.

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.1 Bluesky, 0.1 Mastodon, and 0.4 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.1 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Patch Available

Vendor Patches (1)

github_advisorypatch availablevia nvd_reference
View patch

References

github.com / rust-vmm/vm-superio/issues/17
Third Party Advisory
github.com / rust-vmm/vm-superio/pull/19
PatchThird Party Advisory