CVE-2017-8797: Linux Kernel

High severity, CVSS 7.5. EPSS: 9.5% chance of exploitation in the next 30 days.

The NFSv4 server in the Linux kernel before 4.11.3 does not properly validate the layout type when processing the NFSv4 pNFS GETDEVICEINFO or LAYOUTGET operand in a UDP packet from a remote attacker. This type value is uninitialized upon encountering certain error conditions. This value is used as an array index for dereferencing, which leads to an OOPS and eventually a DoS of knfsd and a soft-lockup of the whole system.

Affected products

• Linux Linux Kernel: from 4.0, before 4.1.40 (fixed in 4.1.40); from 4.2, before 4.4.70 (fixed in 4.4.70); from 4.5, before 4.9.30 (fixed in 4.9.30); from 4.11, before 4.11.3 (fixed in 4.11.3)

Published 2017-07-02. Last modified 2026-06-17.