CVE-2025-9408 HIGH

CVE-2025-9408: Userspace privilege escalation vulnerability on Cortex M

Vendor Zephyrproject-Rtos

Product Zephyr

Weakness CWE-270

Published November 11, 2025

Last update November 12, 2025

View on NVD All CVEs

CVSS base score

8.2/10

Attack vector Local

Attack complexity High

Privileges required None

User interaction None

Confidentiality High

Integrity High

CVSS vector

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

What the vulnerability does

01Description

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.

Key dates

02Disclosure timeline

November 11, 2025 CVE published

November 12, 2025 Record updated

External resources

03References

NVD — National Vulnerability Database https://nvd.nist.gov/vuln/detail/CVE-2025-9408 CWE — Common Weakness Enumeration https://cwe.mitre.org/data/definitions/270.html

Related vulnerabilities

CVE-2025-9408: Userspace privilege escalation vulnerability on Cortex M

01Description

02Disclosure timeline

03References

04Related CVE