CVE-2017-2636: Debian Linux

High severity, CVSS 7.0. EPSS: 1% chance of exploitation in the next 30 days.

Race condition in drivers/tty/n_hdlc.c in the Linux kernel through 4.10.1 allows local users to gain privileges or cause a denial of service (double free) by setting the HDLC line discipline.

Affected products

• Debian Debian Linux: version 8.0 only
• Linux Linux Kernel: from 2.6.31, before 3.2.87 (fixed in 3.2.87); from 3.3, before 3.10.106 (fixed in 3.10.106); from 3.11, before 3.12.72 (fixed in 3.12.72); from 3.13, before 3.16.42 (fixed in 3.16.42); from 3.17, before 3.18.49 (fixed in 3.18.49); from 3.19, before 4.1.49 (fixed in 4.1.49); …

Published 2017-03-07. Last modified 2026-06-17.