CVE-2019-19227: Linux Kernel

Medium severity, CVSS 5.5. EPSS: 0.6% chance of exploitation in the next 30 days.

In the AppleTalk subsystem in the Linux kernel before 5.1, there is a potential NULL pointer dereference because register_snap_client may return NULL. This will lead to denial of service in net/appletalk/aarp.c and net/appletalk/ddp.c, as demonstrated by unregister_snap_client, aka CID-9804501fa122.

Affected products

• Linux Linux Kernel: before 5.1 (fixed in 5.1)

Published 2019-11-22. Last modified 2026-06-17.