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

> CVE-2026-122192: Guest access to Firecracker process memory after a failed memory discard. CVSS 7.5 (CVSS 3.1).

Canonical: https://rewindex.com/cve/CVE-2026-122192
Last updated: 2026-11-09T22:18:34Z

- Published: 2026-11-04 19:35 UTC · Updated: 2026-11-09 22:18 UTC · Assigner: AMZN
- CVSS: 7.5 (CVSS 3.1) · Severity: High · Vector: CVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:C/C:H/I:H/A:H
- EPSS: 0.16%, 5th percentile (scored 2026-11-10)
- CISA KEV: no
- CWE: CWE-390, CWE-825

## 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.

## Affected vendors and products

- AWS: firecracker

## Tracked companies

- [Amazon Web Services](https://rewindex.com/company/aws.md)

## References

- [CVE record on cve.org](https://www.cve.org/CVERecord?id=CVE-2026-122192)
- [NVD entry](https://nvd.nist.gov/vuln/detail/CVE-2026-122192)
- [https://aws.amazon.com/security/security-bulletins/2026-169-aws/](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/v1.16.2)
- [https://github.com/firecracker-microvm/firecracker/releases/tag/v1.17.0](https://github.com/firecracker-microvm/firecracker/releases/tag/v1.17.0)
- [https://github.com/firecracker-microvm/firecracker/security/advisories/GHSA-48ww-rqpp-2mgm](https://github.com/firecracker-microvm/firecracker/security/advisories/GHSA-48ww-rqpp-2mgm)

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_Sources: CVE records from the CVE Program (cve.org). CVE® is a registered trademark of The MITRE Corporation. (https://www.cve.org/) This product uses data from the NVD API but is not endorsed or certified by the NVD. (https://nvd.nist.gov/) Known Exploited Vulnerabilities catalog from CISA. (https://www.cisa.gov/known-exploited-vulnerabilities-catalog) EPSS scores from FIRST (Exploit Prediction Scoring System). (https://www.first.org/epss/)_


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Canonical: https://rewindex.com/cve/CVE-2026-122192 · Markdown: https://rewindex.com/cve/CVE-2026-122192.md · JSON: https://rewindex.com/api/v1/cves/CVE-2026-122192 · Data licensed CC BY 4.0 (https://creativecommons.org/licenses/by/4.0/) · Generated 2026-11-11T05:26:39.793Z