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CVE-2026-5747

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CVE-2026-5747

Published: Apr 7, 2026

Modified: Apr 20, 2026

PUBLISHED

CVSS v3.1

7.5

HIGH

Description

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.

VendorProductVersions

AWS

Firecracker

affected
1.13.0 - <= 1.14.3
affected
1.15.0
unaffected
1.14.4
unaffected
1.15.1

Weaknesses (CWE)

CWE-787
CWE-369

CVSS v3.1 Details

CVSS v3.1 Vector

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

Attack Vector

Local

Attack Complexity

High

Privileges Required

High

User Interaction

None

Scope

Changed

Confidentiality

High

Integrity

High

Availability

High

References

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