CVE-2017-18221: Linux Kernel

Medium severity, CVSS 5.5. EPSS: 0.5% chance of exploitation in the next 30 days.

The __munlock_pagevec function in mm/mlock.c in the Linux kernel before 4.11.4 allows local users to cause a denial of service (NR_MLOCK accounting corruption) via crafted use of mlockall and munlockall system calls.

Affected products

• Linux Linux Kernel: before 4.11.4 (fixed in 4.11.4)

Published 2018-03-07. Last modified 2026-06-17.