Is CVE-2025-9408 actively exploited?

No active exploitation of CVE-2025-9408 has been confirmed so far. Continue monitoring, as exploit status can change.

Can CVE-2025-9408 be exploited remotely?

No. CVE-2025-9408 requires local access to exploit.

What is the CVSS score of CVE-2025-9408?

CVE-2025-9408 has a CVSS score of 8.1 (HIGH).

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HIGH

CVE-2025-9408

CWE-270Published: November 11, 2025· Updated: Jun 17, 2026

8.1

CVSS v3.1

Official 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.

NVD Source

Technical Analysis

CVE-2025-9408 requires local access, meaning attackers must already have a foothold on the target system.

The vulnerability requires no privileges and no user interaction, making it a prime target for automated exploitation campaigns and worm-like propagation.

A successful exploit results in complete confidentiality breach (data exposure), full integrity compromise (data manipulation), availability disruption (denial of service), with a CVSS base score of 8.1.

The vulnerability has a "Changed" scope, meaning successful exploitation can impact components beyond the vulnerable component itself — such as the host operating system or adjacent services.