Firecracker vsock implementation buffer overflow in versions 0.18.0 and 0.19.0.
Priority MEDIUM 48CWE-120Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- None
- Attack complexity
- Low
- Impact type
- Code execution
- Confidentiality · integrity · availability
- High · High · High
- Fix status
- No fix listed
Attack profile from CVSS 3.1 · NVD. Fix status from CNA. Impact type from CWE-120 and the CVSS impact.
Summary
Firecracker vsock implementation buffer overflow in versions 0.18.0 and 0.19.0. This can result in potentially exploitable crashes.
Why it matters now
EPSS 0.03252 88th 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
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| — | — | all versions | — | No fix listed | CNA |
- — Vendor— Affected all versions Fixed in — No fix listed CNA
Remediation
No fixed version listed by the sources yet.
Timeline
- 2026-10-02 Threatist record created from CVE-2019-18960
- 2026-10-03 Alias added: GHSA-979p-m9gj-6h5g
References
Advisory 6
- https://github.com/firecracker-microvm/firecracker/releases
- http://www.openwall.com/lists/oss-security/2019/12/10/1
- https://github.com/firecracker-microvm/firecracker/issues/1462
- https://github.com/firecracker-microvm/firecracker/releases/tag/v0.19.1
- https://github.com/firecracker-microvm/firecracker/releases/tag/v0.18.1
- [oss-security] 20220911 Re: CVE-2019-18960: Firecracker v0.18.0 and v0.19.0 vsock buffer overflow
More AWS Firecracker vulnerabilities
- 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-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
- CVE-2019-18960 · CVE Program
- CVE-2019-18960 · NVD
- FIRST EPSS
- GHSA-979p-m9gj-6h5g · GitHub Advisory Database · CC BY 4.0
This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences