CVE-2026-5747An 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 Firecra…
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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
- 7.5 HIGH (v3.1, NVD)CVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:C/C:H/I:H/A:H
- Weakness (CWE)
- CWE-369, CWE-787
- Known exploited
- Not in CISA's KEV catalog
- EPSS (exploitation in the next 30 days)
- Not loaded for this CVE
- Assigned by
- Not given
- NVD analysis
- Analyzed
- Record last updated
- Jul 24, 2026
- First seen by InfoSec Signals
- Oct 9, 2026
Affected products
amazon firecracker amazon:firecracker | from 1.13.0 through 1.14.3; 1.15.0; 1.15.0 | NVD |
References
- https://aws.amazon.com/security/security-bulletins/2026-015-aws/vendor-advisory
- https://github.com/firecracker-microvm/firecracker/releases/tag/v1.14.4release-notes
- https://github.com/firecracker-microvm/firecracker/releases/tag/v1.15.1release-notes
- https://github.com/firecracker-microvm/firecracker/security/advisories/GHSA-776c-mpj7-jm3rvendor-advisory
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.