CVE-2016-8666: Linux Kernel

High severity, CVSS 7.5. EPSS: 4.7% chance of exploitation in the next 30 days.

The IP stack in the Linux kernel before 4.6 allows remote attackers to cause a denial of service (stack consumption and panic) or possibly have unspecified other impact by triggering use of the GRO path for packets with tunnel stacking, as demonstrated by interleaved IPv4 headers and GRE headers, a related issue to CVE-2016-7039.

Affected products

• Linux Linux Kernel: from 3.14, before 3.16.35 (fixed in 3.16.35); from 3.17, before 3.18.47 (fixed in 3.18.47); from 3.19, before 4.1.38 (fixed in 4.1.38); from 4.2, before 4.4.29 (fixed in 4.4.29); from 4.5, before 4.6 (fixed in 4.6)

Published 2016-10-16. Last modified 2026-06-17.