CVE-2017-6347: Linux Kernel

High severity, CVSS 7.8. EPSS: 0.4% chance of exploitation in the next 30 days.

The ip_cmsg_recv_checksum function in net/ipv4/ip_sockglue.c in the Linux kernel before 4.10.1 has incorrect expectations about skb data layout, which allows local users to cause a denial of service (buffer over-read) or possibly have unspecified other impact via crafted system calls, as demonstrated by use of the MSG_MORE flag in conjunction with loopback UDP transmission.

Affected products

• Linux Linux Kernel: from 4.0, before 4.4.52 (fixed in 4.4.52); from 4.5, before 4.9.13 (fixed in 4.9.13); from 4.10, before 4.10.1 (fixed in 4.10.1)

Published 2017-03-01. Last modified 2026-06-17.