CVE-2016-4794: Canonical Ubuntu Linux

High severity, CVSS 7.8. EPSS: 0.5% chance of exploitation in the next 30 days.

Use-after-free vulnerability in mm/percpu.c in the Linux kernel through 4.6 allows local users to cause a denial of service (BUG) or possibly have unspecified other impact via crafted use of the mmap and bpf system calls.

Affected products

• Canonical Ubuntu Linux: version 14.04 only; version 16.04 only
• Linux Linux Kernel: from 3.18, before 3.18.37 (fixed in 3.18.37); from 3.19, before 4.1.28 (fixed in 4.1.28); from 4.2, before 4.4.16 (fixed in 4.4.16); from 4.5, before 4.6.5 (fixed in 4.6.5)

Published 2016-05-23. Last modified 2026-06-17.