CVE WatchOct 18, 2026

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 malici

CVSS

8.1

High

EPSS

0.1%

KEV

—

Exploit Today

0-100

Published: Nov 11, 2025 · Last modified: Oct 18, 2026 · CWE-270

EPSS · 30d

0.1%EPSS · 30 days0.1%

2026-09-232026-10-21

Technical 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.

Official references

github.comhttps://github.com/zephyrproject-rtos/zephyr/security/advisories/GHSA-3r6j-5mp3-75wr

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