CVE-2017-12762: Canonical Ubuntu Linux

Critical severity, CVSS 9.8. EPSS: 5.2% chance of exploitation in the next 30 days.

In /drivers/isdn/i4l/isdn_net.c: A user-controlled buffer is copied into a local buffer of constant size using strcpy without a length check which can cause a buffer overflow. This affects the Linux kernel 4.9-stable tree, 4.12-stable tree, 3.18-stable tree, and 4.4-stable tree.

Affected products

• Canonical Ubuntu Linux: version 12.04 only; version 14.04 only
• Linux Linux Kernel: from 3.18, before 3.18.64 (fixed in 3.18.64); from 3.19, up to and including 4.4.80; from 4.5, up to and including 4.9.41; from 4.10, up to and including 4.12.5

Published 2017-08-09. Last modified 2026-06-17.