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CVE-2026-122192Guest access to Firecracker process memory after a failed memory discard
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.
7.1 HIGHEPSS 0.15%Not in KEVNVD: Received
Overview
Severity
| Score | Severity | Version | Vector String |
|---|---|---|---|
| 7.1 | HIGH | 4.0AMZN (CNA) | 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 |
| 7.5 | HIGH | 3.1AMZN (CNA) | CVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:C/C:H/I:H/A:H |
Details
- CVE ID
- CVE-2026-122192
- Status
- Received
- Assigner (CNA)
- AMZN
- Published
- Nov 4, 2026
- Last modified
- 2026-11-04 20:19 UTC
Affected Products
As published by the CNA in the CVE record.
AWSfirecracker1 version range
- 0.23.0 before 1.16.2
References
- aws.amazon.com https://aws.amazon.com/security/security-bulletins/2026-169-aws/
- 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
- github.com https://github.com/firecracker-microvm/firecracker/security/advisories/GHSA-48ww-rqpp-2mgm