What is CVE-2026-5747?

CVE-2026-5747 is a high-severity vulnerability in Amazon Firecracker, classified under Divide By Zero. CVSS score: 7.5/10. Published 2026-04-08.

How severe is CVE-2026-5747?

High severity. CVSS v3 base score is 7.5 out of 10.

Buffer overflow in Amazon Firecracker

CVE-2026-5747

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…

EPSS: 0.000 (1.0th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:C/C:H/I:H/A:H.

Affected products

Amazon Firecracker — versions 1.15.0
Aws Firecracker — versions 1.13.0, 1.15.0, 1.14.4

Weakness classification (CWE)

References

ff89ba41-3aa1-4d27-914a-91399e9639e5 (Release Notes, patch)
ff89ba41-3aa1-4d27-914a-91399e9639e5 (Release Notes, patch)
ff89ba41-3aa1-4d27-914a-91399e9639e5 (vendor-advisory, Vendor Advisory)
ff89ba41-3aa1-4d27-914a-91399e9639e5 (Vendor Advisory, third-party-advisory)

Frequently asked questions

What is CVE-2026-5747?: CVE-2026-5747 is a high-severity vulnerability in Amazon Firecracker, classified under Divide By Zero. CVSS score: 7.5/10. Published 2026-04-08.
How severe is CVE-2026-5747?: High severity. CVSS v3 base score is 7.5 out of 10.