Wi-Fi Protected Access (WPA and WPA2) allows reinstallation of the Group
Temporal Key (GTK) during the group key handshake, allowing an attacker
within radio range to replay frames from access points to
Jann Horn discovered that the Berkeley Packet Filter (BPF) implementation
in the Linux kernel improperly performed sign extension in some situations.
A local attacker could use this to cause a denial of service (system crash)
or possibly execute arbitrary code. (CVE-2017-16995)
The problem can be corrected by updating your livepatches to the following