CVE-2014-3122: Canonical Ubuntu Linux

Medium severity, CVSS 4.9. EPSS: 0.5% chance of exploitation in the next 30 days.

The try_to_unmap_cluster function in mm/rmap.c in the Linux kernel before 3.14.3 does not properly consider which pages must be locked, which allows local users to cause a denial of service (system crash) by triggering a memory-usage pattern that requires removal of page-table mappings.

Affected products

• Canonical Ubuntu Linux: version 14.04 only
• Debian Debian Linux: version 7.0 only
• Linux Linux Kernel: before 3.14.3 (fixed in 3.14.3)

Published 2014-05-11. Last modified 2026-06-17.