{"cve":"CVE-2026-5747","nvd":{"published":"2026-04-08T00:16:05.657","modified":"2026-07-24T09:10:00.153","status":"Analyzed","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.\n\nTo remediate this, users should upgrade to Firecracker 1.14.4 or 1.15.1 and later.","cvss_v4":{"vector":"CVSS:4.0/AV:L/AC:H/AT:P/PR:H/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H","score":8.7},"cvss_v3":{"version":"3.1","vector":"CVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:C/C:H/I:H/A:H","score":7.5},"cwes":["CWE-369","CWE-787"],"references":["https://aws.amazon.com/security/security-bulletins/2026-015-aws/","https://github.com/firecracker-microvm/firecracker/releases/tag/v1.14.4","https://github.com/firecracker-microvm/firecracker/releases/tag/v1.15.1","https://github.com/firecracker-microvm/firecracker/security/advisories/GHSA-776c-mpj7-jm3r"],"products":["amazon:firecracker"],"source":"nvd","synced_at":"2026-10-19T22:28:59.047572785+00:00"},"epss":{"cve":"CVE-2026-5747","score":0.00256,"percentile":0.1735,"date":"2026-10-31"},"kev":null,"osv":[],"attribution":["This product uses the NVD API but is not endorsed or certified by the NVD.","EPSS scores: FIRST Exploit Prediction Scoring System, https://www.first.org/epss","Known exploited vulnerabilities: CISA Known Exploited Vulnerabilities Catalog, https://www.cisa.gov/known-exploited-vulnerabilities-catalog","Package advisories: OSV (https://osv.dev), from the GitHub Advisory Database, PyPA, Go, RustSec and other ecosystem databases, under CC-BY 4.0 or CC0","CVE records: the CVE Program's CVE List (https://www.cve.org), under its terms of use (https://www.cve.org/Legal/TermsOfUse). CVE is a registered trademark of The MITRE Corporation; this product is not affiliated with the CVE Program."]}