A vulnerability in the Key Management sub component was found in the Linux kernel. Trying to KEYTCL_READ on negative key would lead to a NULL pointer dereference. A local attacker could use this flaw to crash the kernel.
An upstream patch:
Created kernel tracking bugs for this issue:
Affects: fedora-all [bug 1493436]
This issue does not affect the Linux kernel packages as shipped with Red Hat Enterprise Linux 5.
This issue affects the Linux kernel packages as shipped with Red Hat Enterprise Linux 6, 7 and MRG-2.
Future Linux kernel updates for the respective releases will address this issue.
This issue has been addressed in the following products:
Red Hat Enterprise Linux 7
Via RHSA-2018:0151 https://access.redhat.com/errata/RHSA-2018:0151