net/sunrpc/xdr.c in the Linux kernel before 5.13.4 allows remote attackers to cause a denial of service (xdr_set_page_base slab-out-of-bounds access) by performing many NFS 4.2 READ_PLUS operations.
https://security.netapp.com/advisory/ntap-20210902-0010/
https://github.com/torvalds/linux/commit/6d1c0f3d28f98ea2736128ed3e46821496dc3a8c
https://cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.13.4