CVE-2026-122192 (CVSS 7.5)

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.

Is your site exposed to CVE-2026-122192?

Run a free security scan — no signup, results in seconds.

CVSS v3.1 Score

7.5

HIGH

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

EPSS — Exploit Prediction

0.0016

Probability of exploitation

0.05%

Percentile rank

EPSS estimates the probability that this vulnerability will be exploited in the wild within the next 30 days. A higher score means more likely to be exploited.

Weakness Type (CWE)

CWE-390 CWE-390

CWE-825 CWE-825

References

Other References

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/v1.17.0 https://github.com/firecracker-microvm/firecracker/security/advisories/GHSA-48ww-rqpp-2mgm

Frequently Asked Questions

What is CVE-2026-122192? +

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. It has a CVSS v3.1 base score of 7.5 (HIGH).

How severe is CVE-2026-122192? +

CVE-2026-122192 has a CVSS v3.1 score of 7.5 out of 10, rated HIGH. This is a high-severity vulnerability that should be prioritized for patching. The EPSS score is 0.0016, placing it in the 0th percentile for exploitation probability.

How do I check if I'm vulnerable to CVE-2026-122192? +

You can use Secably's free Website Scanner to check your website for known vulnerabilities. For infrastructure scanning, use the Port Scanner to identify exposed services that may be affected. Check the vendor advisories linked above for specific patch and version information.

Related Vulnerabilities

CVE-2026-104480

Discord libdave before 1.2.0 did not reject an MLS Welcome message when the resulting group roster contained an unrecognized participant. …

CVE-2026-62275

Detection of error condition without action in the MigTD's vmcall_raw transport for the Intel(R) TDX Migration Trust Domain (MigTD) within …

CVE-2026-102280

Sandboxie-Plus is an open source sandbox-based isolation software for Windows. Prior to 1.18.6, a process inside a sandbox could send …

CVE-2026-111823 9.8

Mage OSS through 0.9.80 before 76c4f46 can proceed with session creation upon encountering an unknown OAuth provider.

CVE-2026-52989 9.8

In the Linux kernel, the following vulnerability has been resolved: nvmet-tcp: propagate nvmet_tcp_build_pdu_iovec() errors to its callers Currently, when nvmet_tcp_build_pdu_iovec() …

CVE-2026-53434 9.1

Detection of Error Condition Without Action vulnerability in Apache Tomcat when configuring CRLs for a FFM based connector. This issue …