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TI-2020-16517 Aliases CVE-2020-27174GHSA-w7c8-xhpc-x95j

In Amazon AWS Firecracker before 0.21.3, and 0.22.x before 0.22.1, the serial console…

Priority LOW 36CWE-401Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
None
Attack complexity
Low
Impact type
Denial of service
Confidentiality · integrity · availability
None · None · High
Fix status
No fix listed

Attack profile from CVSS 3.1 · NVD. Fix status from CNA. Impact type from CWE-401.

Summary

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.

Why it matters now

EPSS 0.01741 77th percentileScored 2026-11-07
Fix No fix listed No fixed version in the sources yet

SSVC decision points

Not available: CISA has not published SSVC decision points for this record.

Affected products

VendorProductAffected versionsFixed inStatusSource
——all versions—No fix listedCNA
  • — Vendor— Affected all versions Fixed in — No fix listed CNA

CPE configurations NVD · 1

CPEVersionsRoleVendor
cpe:2.3:a:amazon:firecracker:*:*:*:*:*:*:*:*before 0.21.3; 0.22.0 to before 0.22.1VulnerableAWS
  • cpe:2.3:a:amazon:firecracker:*:*:*:*:*:*:*:* Versions before 0.21.3; 0.22.0 to before 0.22.1 Vulnerable ·AWS

Remediation

No fixed version listed by the sources yet.

Timeline

  1. 2026-10-02 Threatist record created from CVE-2020-27174
  2. 2026-10-03 Alias added: GHSA-w7c8-xhpc-x95j

References

Patch 2

Advisory 2

  • TI-2019-13671 Firecracker vsock implementation buffer overflow in versions 0.18.0 and 0.19.0. CVSS 3.1CRITICAL 9.8
  • TI-2026-05038 Out-of-bounds Write in Firecracker virtio-pci Transport CVSS 4.0HIGH 8.7
  • TI-2020-12848 In Firecracker 0.20.x before 0.20.1 and 0.21.x before 0.21.2, the network stack can… CVSS 3.1MEDIUM 5.9
  • TI-2026-01085 Arbitrary Host File Overwrite via Symlink in Firecracker Jailer CVSS 4.0MEDIUM 6.0

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences