CVE-2025-9408

HIGH
Published Nov 11, 2025 Modified Apr 15, 2026 CWE-270

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.

CVSS v3.1 Score

8.1
HIGH
CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:H

Weakness Type (CWE)

CWE-270 CWE-270

References

Frequently Asked Questions

What is CVE-2025-9408? +
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. It has a CVSS v3.1 base score of 8.1 (HIGH).
How severe is CVE-2025-9408? +
CVE-2025-9408 has a CVSS v3.1 score of 8.1 out of 10, rated HIGH. This is a high-severity vulnerability that should be prioritized for patching.
How do I check if I'm vulnerable to CVE-2025-9408? +
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.

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