In the Linux kernel before 5.1.13, there is a memory leak in drivers/scsi/libsas/sas_expander.c when SAS expander discovery fails. This will cause a BUG and denial of service.
https://support.f5.com/csp/article/K52136304?utm_source=f5support&%3Butm_medium=RSS
https://security.netapp.com/advisory/ntap-20191004-0001/
https://lists.debian.org/debian-lts-announce/2019/09/msg00025.html
https://lists.debian.org/debian-lts-announce/2019/09/msg00015.html
https://lists.debian.org/debian-lts-announce/2019/09/msg00014.html
https://cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.1.13