CVE-2026-122192

CVSS 7.5 (high) · published 2026-11-04

Improper handling of a failed memory remap in Firecracker versions 0.23.0 through 1.16.1 might allow a guest user with root privileges to read or modify Firecracker VMM process memory via balloon or virtio-mem discard requests on microVMs restored from a snapshot with the File memory backend, if the host fails to create the replacement mapping. To remediate this issue, users should upgrade to Firecracker 1.16.2 or 1.17.0 and later.

Weakness: CWE-390, CWE-825

Source: NVD CVE-2026-122192

References

• https://aws.amazon.com/security/security-bulletins/2026-169-aws/
• https://github.com/firecracker-microvm/firecracker/releases/tag/v1.16.2
• https://github.com/firecracker-microvm/firecracker/releases/tag/v1.17.0
• https://github.com/firecracker-microvm/firecracker/security/advisories/GHSA-48ww-rqpp-2mgm

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