Greg Kroah-Hartman has released the 4.14.131, 4.9.184, and 4.4.184 stable kernels. Each contains a
single patch that fixes a problem in the TCP
SACK panic fixes that was commonly seen by the Steam gaming
community.

Source: LWN.net – Stable kernels 4.14.131, 4.9.184, and 4.4.184