CVE-2026-5747

HIGH EPSS 10.9%
Published Apr 8, 20262mo ago · Modified Jun 17, 20262w ago
8.7 CVSS 4.0
High
Find Similar
Published Apr 8, 2026 2mo ago
Last Modified Jun 17, 2026 2w ago

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.

CVSS Details

Base Score
8.7
Exploitability
—
Impact
—
Vector string
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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
Attack Vector Local
Attack Complexity High
Privileges Required High
User Interaction None
Scope X

Threat Intelligence

EPSS Exploit Probability
10.9% percentile
Exploit & Patch Status
No Known Exploit
No Patch Available

Weaknesses 2

CWE-369
CWE-787 Out-of-bounds Write Memory Safety

Affected Products 3

VendorProductVersionRange
amazonfirecracker*≥1.13.0  –  ≤1.14.3
amazonfirecracker1.15.0any
amazonfirecracker1.15.0any

References 4

  • aws.amazon.com https://aws.amazon.com/security/security-bulletins/2026-015-aws/
    Vendor Advisory
  • github.com https://github.com/firecracker-microvm/firecracker/releases/tag/v1.14.4
    Release Notes
  • github.com https://github.com/firecracker-microvm/firecracker/releases/tag/v1.15.1
    Release Notes
  • github.com https://github.com/firecracker-microvm/firecracker/security/advisories/GHSA-776c-mpj7-jm3r
    Vendor Advisory

Remediation

No remediation data recorded yet

Check vendor advisories and the NVD entry for patch availability.