The NFSv2/NFSv3 server in the nfsd subsystem in the Linux kernel through 4.10.11 allows remote attackers to cause a denial of service (system crash) via a long RPC reply, related to net/sunrpc/svc.c, fs/nfsd/nfs3xdr.c, and fs/nfsd/nfsxdr.c.
https://usn.ubuntu.com/3754-1/
https://marc.info/?l=linux-nfs&m=149247516212924&w=2
https://marc.info/?l=linux-nfs&m=149218228327497&w=2
https://github.com/torvalds/linux/commit/e6838a29ecb484c97e4efef9429643b9851fba6e
https://access.redhat.com/errata/RHSA-2018:1319
https://access.redhat.com/errata/RHSA-2017:1647
https://access.redhat.com/errata/RHSA-2017:1616
https://access.redhat.com/errata/RHSA-2017:1615