CVE-2017-11176: Debian Linux

High severity, CVSS 7.8. EPSS: 3.8% chance of exploitation in the next 30 days.

The mq_notify function in the Linux kernel through 4.11.9 does not set the sock pointer to NULL upon entry into the retry logic. During a user-space close of a Netlink socket, it allows attackers to cause a denial of service (use-after-free) or possibly have unspecified other impact.

Affected products

• Debian Debian Linux: version 8.0 only; version 9.0 only
• Linux Linux Kernel: before 3.2.92 (fixed in 3.2.92); from 3.3, before 3.16.47 (fixed in 3.16.47); from 3.17, before 3.18.61 (fixed in 3.18.61); from 3.19, before 4.1.43 (fixed in 4.1.43); from 4.2, before 4.4.77 (fixed in 4.4.77); from 4.5, before 4.9.38 (fixed in 4.9.38); …

Published 2017-07-11. Last modified 2026-06-17.