CVE-2026-122192
Guest access to Firecracker process memory after a failed memory discard
CVSS Score
7.5
EPSS Score
0.0%
EPSS Percentile
0th
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.
| CWE | CWE-390 CWE-825 |
| Vendor | aws |
| Product | firecracker |
| Published | Nov 4, 2026 |
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CVSS v3 Breakdown
CVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:C/C:H/I:H/A:H Attack Vector
Local
Attack Complexity
High
Privileges Required
High
User Interaction
None
Scope
Changed
Confidentiality
High
Integrity
High
Availability
High
Affected Versions
AWS / firecracker
0.23.0 < 1.16.2
References
github.com: https://github.com/firecracker-microvm/firecracker/releases/tag/v1.16.2 github.com: https://github.com/firecracker-microvm/firecracker/releases/tag/v1.17.0 aws.amazon.com: https://aws.amazon.com/security/security-bulletins/2026-169-aws/ github.com: https://github.com/firecracker-microvm/firecracker/security/advisories/GHSA-48ww-rqpp-2mgm
Credits
Coinspect