CVE-2017-16939: Debian Linux

High severity, CVSS 7.8. EPSS: 2.2% chance of exploitation in the next 30 days.

The XFRM dump policy implementation in net/xfrm/xfrm_user.c in the Linux kernel before 4.13.11 allows local users to gain privileges or cause a denial of service (use-after-free) via a crafted SO_RCVBUF setsockopt system call in conjunction with XFRM_MSG_GETPOLICY Netlink messages.

Affected products

• Debian Debian Linux: version 8.0 only
• Linux Linux Kernel: from 2.6.28, before 3.2.97 (fixed in 3.2.97); from 3.3, before 3.16.52 (fixed in 3.16.52); from 3.17, before 3.18.86 (fixed in 3.18.86); from 3.19, before 4.1.48 (fixed in 4.1.48); from 4.2, before 4.4.104 (fixed in 4.4.104); from 4.5, before 4.9.60 (fixed in 4.9.60); …

Published 2017-11-24. Last modified 2026-06-17.