drivers/net/ethernet/xilinx/ll_temac_main.c in the Linux kernel before 5.12.13 allows remote attackers to cause a denial of service (buffer overflow and lockup) by sending heavy network traffic for about ten minutes.
https://security.netapp.com/advisory/ntap-20210902-0007/
https://github.com/torvalds/linux/commit/c364df2489b8ef2f5e3159b1dff1ff1fdb16040d
https://cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.12.13