An issue was discovered in the Linux kernel before 5.13.3. lib/seq_buf.c has a seq_buf_putmem_hex buffer overflow.
https://security.netapp.com/advisory/ntap-20230427-0005/
https://lore.kernel.org/lkml/20210625122453.5e2fe304%40oasis.local.home/
https://lkml.kernel.org/r/20210626032156.47889-1-yun.zhou%40windriver.com
https://cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.13.3