# CVE-2025-9408

## Summary

- **CVE ID:** CVE-2025-9408
- **Severity:** HIGH
- **CVSS Score:** 8.2 (CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:H)
- **CWE:** CWE-270
- **Published:** Nov 11, 2025
- **Last Modified:** Mar 12, 2026

## Description

System call entry on Cortex M (and possibly R and A, but I think not) has a race which allows very practical privilege escalation for malicious userspace processes.

## Affected Products

- zephyrproject-rtos — Zephyr (*)

## References

- [CNA](https://github.com/zephyrproject-rtos/zephyr/security/advisories/GHSA-3r6j-5mp3-75wr)

## Exploitation Prediction (EPSS)

- **EPSS Score:** 0.11%
- **EPSS Percentile:** 1.7

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_Exported from OnDuty AI Vulnerability Intelligence on 2026-09-11._