CVE-2016-3135: Canonical Ubuntu Linux

High severity, CVSS 7.8. EPSS: 1% chance of exploitation in the next 30 days.

Integer overflow in the xt_alloc_table_info function in net/netfilter/x_tables.c in the Linux kernel through 4.5.2 on 32-bit platforms allows local users to gain privileges or cause a denial of service (heap memory corruption) via an IPT_SO_SET_REPLACE setsockopt call.

Affected products

• Canonical Ubuntu Linux: version 14.04 only; version 15.10 only; version 16.04 only
• Linux Linux Kernel: from 4.2, before 4.4.21 (fixed in 4.4.21); from 4.5, before 4.6 (fixed in 4.6)

Published 2016-04-27. Last modified 2026-06-17.