VULNERABILITY INTELLIGENCE

CVE-2026-5747

CVSS score8.7 HIGH
EPSS probability0.26%
CISA KEVNot currently listed
Published2026-04-08
Last modified2026-07-24
CVSS vectorCVSS:4.0/AV:L/AC:H/AT:P/PR:H/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H

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.

Weakness classification

  • CWE-369: Divide By Zero
  • CWE-787: Out-of-bounds Write

Primary references