CVE-2026-5747

An out-of-bounds write issue in the virtio PCI transport in 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.

CVSS v3 7.5 HIGH

7.5^/10

CVSS v3 : HIGH

Vector :

Exploitability : 0.8 / Impact : 6.0

Attack Vector LOCAL

Attack Complexity HIGH

Privileges Required HIGH

User Interaction NONE

Confidentiality Impact HIGH

Integrity Impact HIGH

Availability Impact HIGH

Scope CHANGED

References

Link	Resource
https://aws.amazon.com/security/security-bulletins/2026-015-aws/	Vendor Advisory
https://github.com/firecracker-microvm/firecracker/releases/tag/v1.14.4	Release Notes
https://github.com/firecracker-microvm/firecracker/releases/tag/v1.15.1	Release Notes
https://github.com/firecracker-microvm/firecracker/security/advisories/GHSA-776c-mpj7-jm3r	Vendor Advisory

Configurations

Configuration 1 (hide)

OR	cpe:2.3:a:amazon:firecracker::::::::
	cpe:2.3:a:amazon:firecracker:1.15.0:-::::::
	cpe:2.3:a:amazon:firecracker:1.15.0:dev::::::

History

No history.

Information

Published : 2026-04-08 00:16

Updated : 2026-07-24 09:10

NVD link : CVE-2026-5747

Mitre link : CVE-2026-5747

CVE.ORG link : CVE-2026-5747

JSON object : View

Products Affected

amazon

firecracker

CWE

CWE-369

Divide By Zero

CWE-787

Out-of-bounds Write

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