CVE-2017-16995: Canonical Ubuntu Linux

High severity, CVSS 7.8. EPSS: 30.1% chance of exploitation in the next 30 days.

The check_alu_op function in kernel/bpf/verifier.c in the Linux kernel through 4.4 allows local users to cause a denial of service (memory corruption) or possibly have unspecified other impact by leveraging incorrect sign extension.

Affected products

• Canonical Ubuntu Linux: version 14.04 only; version 16.04 only
• Debian Debian Linux: version 9.0 only
• Linux Linux Kernel: from 4.9, before 4.9.72 (fixed in 4.9.72); from 4.10, before 4.14.9 (fixed in 4.14.9)

Published 2017-12-27. Last modified 2026-06-17.