CVE-2025-40217: Linux

EPSS: 0.2% chance of exploitation in the next 30 days.

In the Linux kernel, the following vulnerability has been resolved: pidfs: validate extensible ioctls Validate extensible ioctls stricter than we do now.

Affected products

• Linux Linux: from 6.11, before 6.17.4 (fixed in 6.17.4)

Published 2025-12-04. Last modified 2026-06-17.