CVE-2022-23084

What it is

The total size of the user-provided nmreq to nmreq_copyin() was first computed and then trusted during the copyin. This time-of-check to time-of-use bug could lead to kernel memory corruption. On systems configured to include netmap in their devfs_ruleset, a privileged process running in a jail can affect the host environment.

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. 2024-02-15 05:15 UTC PublishedDisclosed publicly on CVE.org and NVD
2. 2026-06-17 04:29 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: 7.5 HIGH (CVSS).
• Fix: a patch or advisory is linked.

Details

Published

2024-02-15 05:15 UTC

Last modified

2026-06-17 04:29 UTC

Exploit probability

0.2% · EPSS, next 30 days

Weakness

CWE-367

Record status

Analyzed

Affected

• Freebsd < 12.3
• Freebsd 12.3
• Freebsd 13.0

Attack profile CVSS 3.1 · 7.5

Attack vector

Local

Complexity

High

Privileges needed

High

User interaction

None

Scope

Changed

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-2022-23084.md and follow it. Check whether this project is affected by CVE-2022-23084. 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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