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Vulnerability record · CVE-2025-9408 · published 11 November 2025

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 p…

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.

8.1 CVSS 3.1 High EPSS 0.11% · top 98.6% CWE-270 · CWE-270 Deferred
8.1CVSS 3.1 base score
0.11%EPSS exploitation probability, 30 days
NoNot in CISA KEV
0Affected product versions listed by NVD
1References
17 Jun 2026Last modified by NVD

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

References

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

Track CVE-2025-9408 inside VULONE

Watch it alongside the ransomware crews, C2 infrastructure and forum chatter that reference it, query it through the API and pull it into your SIEM over TAXII.

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Related vulnerabilities

Same products first, then exploited flaws of the same weakness class.

7.8CVE-2021-3493Ubuntu Linux kernel overlayfs file capability privilege escalationThe Linux kernel overlayfs implementation failed to properly validate file capability settings on files in an underlying filesystem with respect to u…KEVEPSS 49%analysed

Source: NIST National Vulnerability Database (record CVE-2025-9408), CISA KEV, FIRST EPSS (scores of 2026-09-27). This page is refreshed as NVD updates the record.