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CVE-2026-5747

HIGH

7.5

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.

CVE Details

CVSS v3.1 Score7.5

SeverityHIGH

CVSS VectorCVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:C/C:H/I:H/A:H

Attack VectorLOCAL

ComplexityHIGH

Privileges RequiredHIGH

User InteractionNONE

Published4/8/2026

Last Modified4/8/2026

Sourcenvd

Honeypot Sightings0

Weaknesses (CWE)

CWE-369CWE-787

References

https://aws.amazon.com/security/security-bulletins/2026-015-aws/(ff89ba41-3aa1-4d27-914a-91399e9639e5)

https://github.com/firecracker-microvm/firecracker/releases/tag/v1.14.4(ff89ba41-3aa1-4d27-914a-91399e9639e5)

https://github.com/firecracker-microvm/firecracker/releases/tag/v1.15.1(ff89ba41-3aa1-4d27-914a-91399e9639e5)

https://github.com/firecracker-microvm/firecracker/security/advisories/GHSA-776c-mpj7-jm3r(ff89ba41-3aa1-4d27-914a-91399e9639e5)

IOC Correlations

No correlations recorded

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