{"id":"CVE-2025-9408","title":"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.","summary":"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.","severity":"high","cvss":8.1,"cvssVector":"CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:H","cwe":["CWE-270"],"published":"2025-11-11","updated":"2026-10-13","sourceUpdated":"2026-10-13T20:17:01.173","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2025-9408","references":[{"url":"https://github.com/zephyrproject-rtos/zephyr/security/advisories/GHSA-3r6j-5mp3-75wr","label":"vulnerabilities@zephyrproject.org"}],"tags":["nvd"],"epss":0.00123,"epssPercentile":0.01841,"ingestedAt":"2026-10-13T20:53:44.534Z","slug":"CVE-2025-9408","body":"## Overview\n\nSystem 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.\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"twilight","depthScore":45,"depthScoreParts":{"impact":44.6,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[]}