CVE-2020-27174

7.5 highEPSS 1.7%

High (7.5) in amazon firecracker. EPSS 1.7% chance of exploitation in the next 30 days.

In Amazon AWS Firecracker before 0.21.3, and 0.22.x before 0.22.1, the serial console buffer can grow its memory usage without limit when data is sent to the standard input. This can result in a memory leak on the microVM emulation thread, possibly occupying more memory than intended on the host.

Severity

CVSS 3.1

7.5 high

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

EPSS: 1.7% chance of exploitation in the next 30 days; higher than 77% of CVEs (scores of 2026-10-31)
CWE: CWE-401
Published: 2020-10-16
Modified: 2026-06-17
Record from: the NVD, synced 2026-10-19

Affected

amazon:firecracker

References

http://www.openwall.com/lists/oss-security/2020/10/23/1
https://github.com/firecracker-microvm/firecracker/issues/2177
https://github.com/firecracker-microvm/firecracker/pull/2178
https://github.com/firecracker-microvm/firecracker/pull/2179
http://www.openwall.com/lists/oss-security/2020/10/23/1

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