CVE-2016-4951: Canonical Ubuntu Linux

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

The tipc_nl_publ_dump function in net/tipc/socket.c in the Linux kernel through 4.6 does not verify socket existence, which allows local users to cause a denial of service (NULL pointer dereference and system crash) or possibly have unspecified other impact via a dumpit operation.

Affected products

• Canonical Ubuntu Linux: version 14.04 only; version 15.10 only; version 16.04 only
• Linux Linux Kernel: from 3.19, before 4.1.28 (fixed in 4.1.28); from 4.2, before 4.4.14 (fixed in 4.4.14); from 4.5, before 4.6.3 (fixed in 4.6.3)
• Oracle Linux: version 6 only

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