Description

An out-of-bounds write issue in the virtio PCI transport in Amazon Firecracker 1.13.0 through 1.14.3 and 1.15.0 on x86_64 and aarch64 might allow a local guest user with root privileges to crash the Firecracker VMM process or potentially execute arbitrary code on the host via modification of virtio queue configuration registers after device activation. Achieving code execution on the host requires additional preconditions, such as the use of a custom guest kernel or specific snapshot configurations. To remediate this, users should upgrade to Firecracker 1.14.4 or 1.15.1 and later.

INFO

Published Date :

2026-04-07T23:17:23.944Z

Last Modified :

2026-04-08T15:15:58.759Z

Source :

AMZN
AFFECTED PRODUCTS

The following products are affected by CVE-2026-5747 vulnerability.

Vendors Products
Aws
  • Firecracker
REFERENCES

Here, you will find a curated list of external links that provide in-depth information to CVE-2026-5747.

URL Resource
https://aws.amazon.com/security/security-bulletins/2026-015-aws/ cve-icon cve-icon
https://github.com/firecracker-microvm/firecracker/releases/tag/v1.14.4 cve-icon cve-icon
https://github.com/firecracker-microvm/firecracker/releases/tag/v1.15.1 cve-icon cve-icon
https://github.com/firecracker-microvm/firecracker/security/advisories/GHSA-776c-mpj7-jm3r cve-icon cve-icon
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CVSS Vulnerability Scoring System

Detailed values of each vector for above chart.
Attack Vector
Attack Complexity
Attack Requirements
Privileges Required
User Interaction
VS Confidentiality
VS Integrity
VS Availability
SS Confidentiality
SS Integrity
SS Availability
Detailed values of each vector for above chart.
Attack Vector
Attack Complexity
Privileges Required
User Interaction
Scope
Confidentiality Impact
Integrity Impact
Availability Impact