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.
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History
Wed, 08 Apr 2026 16:15:00 +0000
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Tue, 07 Apr 2026 23:30:00 +0000
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| 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. | |
| Title | Out-of-bounds Write in Firecracker virtio-pci Transport | |
| Weaknesses | CWE-369 CWE-787 |
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cvssV3_1
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Status: PUBLISHED
Assigner: AMZN
Published: 2026-04-07T23:17:23.944Z
Updated: 2026-04-08T15:15:58.759Z
Reserved: 2026-04-07T14:39:46.309Z
Link: CVE-2026-5747
Updated: 2026-04-08T15:15:55.692Z
Status : Received
Published: 2026-04-08T00:16:05.657
Modified: 2026-04-08T00:16:05.657
Link: CVE-2026-5747
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