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.
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| AWS | Firecracker | 1.13.0 – ≤ 1.14.3, 1.15.0 | 1.14.4 |
Fixed in Linux distributions
Distributions backport fixes, so the version that fixes this vulnerability differs per release — upgrade to at least the version shown. From the distributions' security trackers and advisories.
openSUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| openSUSE Tumbleweed | firecracker | 1.15.1-1.1 | openSUSE-SU-2026:10561-1 |
Advisories 1
- openSUSE-SU-2026:10561-1 firecracker-1.15.1-1.1 on GA media SUSE / openSUSE Security Updates · Apr 17, 2026
References
- https://github.com/firecracker-microvm/firecracker/releases/tag/v1.15.1 patch
- https://github.com/firecracker-microvm/firecracker/releases/tag/v1.14.4 patch
- https://aws.amazon.com/security/security-bulletins/2026-015-aws/ vendor-advisory
- https://github.com/firecracker-microvm/firecracker/security/advisories/GHSA-776c-mpj7-jm3r third-party-advisory