CVE-2026-122192

high

Description

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.

References

https://github.com/firecracker-microvm/firecracker/security/advisories/GHSA-48ww-rqpp-2mgm

https://github.com/firecracker-microvm/firecracker/releases/tag/v1.17.0

https://github.com/firecracker-microvm/firecracker/releases/tag/v1.16.2

https://euvd.enisa.europa.eu/vulnerability/EUVD-2026-117056

https://aws.amazon.com/security/security-bulletins/2026-169-aws/

Details

Source: Mitre, NVD

Published: 2026-11-04

Updated: 2026-11-04

Risk Information

CVSS v2

Base Score: 5.9

Vector: CVSS2#AV:L/AC:H/Au:M/C:C/I:C/A:C

Severity: Medium

CVSS v3

Base Score: 7.5

Vector: CVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:C/C:H/I:H/A:H

Severity: High

CVSS v4

Base Score: 7.1

Vector: CVSS:4.0/AV:L/AC:L/AT:P/PR:H/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N

Severity: High

EPSS

EPSS: 0.00157