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TI-2020-12848 Aliases CVE-2020-16843GHSA-mq2v-3xvx-978w

In Firecracker 0.20.x before 0.20.1 and 0.21.x before 0.21.2, the network stack can…

Priority LOW 30Published · Updated

Key facts

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

Attack profile from CVSS 3.1 · NVD. Fix status from CNA.

Summary

In Firecracker 0.20.x before 0.20.1 and 0.21.x before 0.21.2, the network stack can freeze under heavy ingress traffic. This can result in a denial of service on the microVM when it is configured with a single network interface, and an availability problem for the microVM network interface on which the issue is triggered.

Why it matters now

EPSS 0.01674 76th 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 · 3

CPEVersionsRoleVendor
cpe:2.3:a:amazon:firecracker:0.20.0:*:*:*:*:*:*:*0.20.0VulnerableAWS
cpe:2.3:a:amazon:firecracker:0.21.0:*:*:*:*:*:*:*0.21.0VulnerableAWS
cpe:2.3:a:amazon:firecracker:0.21.1:*:*:*:*:*:*:*0.21.1VulnerableAWS
  • cpe:2.3:a:amazon:firecracker:0.20.0:*:*:*:*:*:*:* Versions 0.20.0 Vulnerable ·AWS
  • cpe:2.3:a:amazon:firecracker:0.21.0:*:*:*:*:*:*:* Versions 0.21.0 Vulnerable ·AWS
  • cpe:2.3:a:amazon:firecracker:0.21.1:*:*:*:*:*:*:* Versions 0.21.1 Vulnerable ·AWS

Remediation

No fixed version listed by the sources yet.

Timeline

  1. 2026-10-02 Threatist record created from CVE-2020-16843
  2. 2026-10-03 Alias added: GHSA-mq2v-3xvx-978w

References

Advisory 3

  • 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-2020-16517 In Amazon AWS Firecracker before 0.21.3, and 0.22.x before 0.22.1, the serial console… CVSS 3.1HIGH 7.5
  • 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