CVE-2026-122192

What it is

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.

At a glance

Exploitability

Can be exploited locally on the machine with an admin-level account. High risk of data exposure, data tampering, service disruption.

Exploit odds

0.2% chance of exploitation in the next 30 days (EPSS).

Fix

A patch, advisory or fixed version is referenced. Upgrade or apply it.

Timeline

1. 2026-11-04 19:28 UTC ReservedThe CVE id was reserved by its CNA
2. 2026-11-04 20:19 UTC PublishedDisclosed publicly on CVE.org and NVD
3. 2026-11-04 20:19 UTC Last updatedMost recent change to the record

Why it ranks here

• Exploited in the wild: no, CISA does not list it.
• Exploit odds: 0.2% in the next 30 days (EPSS).
• Severity: 7.1 HIGH (CVSS).
• Fix: a patch or advisory is linked.

Details

Published

2026-11-04 20:19 UTC

Last modified

2026-11-04 20:19 UTC

Exploit probability

0.2% · EPSS, next 30 days

Weakness

CWE-390

Record status

Received

Attack profile CVSS 4.0 · 7.1

Attack vector

Local

Complexity

Low

Attack requirements

Present

Privileges needed

High

User interaction

None

Confidentiality

High

Integrity

High

Availability

High

Is it in your code?

Hand this to your coding agent. It searches your project for the affected products and checks versions. Nothing leaves your machine.

Read https://cve-list.com/agent/cve/CVE-2026-122192.md and follow it. Check whether this project is affected by CVE-2026-122192. Read only. Don't change anything and don't upload my code. Tell me yes, no or not sure, with the file as proof.

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