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CVE-2020-27174

24
FAUCET Score

CVE-2020-27174 describes a memory leak vulnerability in Amazon AWS Firecracker versions prior to 0.21.3 and 0.22.x before 0.22.1. This flaw allows an attacker to exhaust host memory by continuously sending data to the serial console, leading to a denial of service. Rated with a CVSS score of 7.5 (High), it is easily exploitable over the network with low attack complexity and no user interaction required. There is currently no evidence of active exploitation, public exploit code, or significant community discussion surrounding this vulnerability.

Impacted Technologies

VendorProductVersion(s)CPE
< 0.21.3CPE matchmatch criteria
cpe:2.3:a:amazon:firecracker:*:*:*:*:*:*:*:*
>= 0.22.0, < 0.22.1CPE matchmatch criteria
cpe:2.3:a:amazon:firecracker:*:*:*:*:*:*:*:*

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
1.74%
Probability of exploitation in next 30 days
EPSS Percentile
75.4%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0174 is in the 58th percentile among its peer group of 51,506 CVEs.

Social Chatter

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 / firecracker-microvm/firecracker/issues/2177
Third Party Advisory
github.com / firecracker-microvm/firecracker/pull/2178
PatchThird Party Advisory
github.com / firecracker-microvm/firecracker/pull/2179
PatchThird Party Advisory
openwall.com / lists/oss-security/2020/10/23/1
Third Party Advisory