CVE-2016-4470: Linux Kernel

Medium severity, CVSS 5.5. EPSS: 0.6% chance of exploitation in the next 30 days.

The key_reject_and_link function in security/keys/key.c in the Linux kernel through 4.6.3 does not ensure that a certain data structure is initialized, which allows local users to cause a denial of service (system crash) via vectors involving a crafted keyctl request2 command.

Affected products

• Linux Linux Kernel: up to and including 4.6.3
• Novell Suse Linux Enterprise Real Time Extension: version 12.0 only
• Oracle Linux: version 5.0 only; version 6 only; version 7 only
• Oracle Vm Server: version 3.3 only; version 3.4 only
• Red Hat Enterprise Linux: version 6.0 only
• Red Hat Enterprise Linux Desktop: version 7.0 only
• Red Hat Enterprise Linux For Real Time: version 7.0 only
• Red Hat Enterprise Linux Hpc Node: version 7.0 only
• Red Hat Enterprise Linux Hpc Node Eus: version 7.0 only
• Red Hat Enterprise Linux Server: version 7.0 only
• Red Hat Enterprise Linux Server Aus: version 7.2 only
• Red Hat Enterprise Linux Server Eus: version 7.2 only
• Red Hat Enterprise Linux Workstation: version 7.0 only
• Red Hat Enterprise Mrg: version 2.0 only

Published 2016-06-27. Last modified 2026-06-17.