CVE-2026-122192Guest access to Firecracker process memory after a failed memory discard

Descripción

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.

Datos: CVE.org, NVD, CISA KEV, FIRST EPSS, Ubuntu. Se publican tal como los indican las fuentes, en inglés.

Productos y versiones afectados

Referencias y parches

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