CVE-2019-19227 Null dereference in n/a

What is CVE-2019-19227?

CVE-2019-19227 is a medium-severity vulnerability in Linux kernel, published on 22 Nov 2019. It can only be exploited from the same machine or local network, with no action from the victim.

Official description

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.

Weakness: CWE-476

Which versions are affected by CVE-2019-19227?

It affects 1 product.

Products include Linux kernel.

How do I fix CVE-2019-19227?

Apply the vendor's patch.

Is CVE-2019-19227 being exploited?

There is no known exploitation of CVE-2019-19227 in the wild and no public exploit code.

Other vulnerabilities in Linux kernel

• CVE-2026-53266 Linux Kernel Out-of-Bounds Write Exploited High 8.8
• CVE-2013-6282 Linux Kernel Improper Input Validation Exploited High 8.8
• CVE-2022-0185 Linux Kernel Heap-Based Buffer Overflow Exploited High 8.4
• CVE-2013-2094 Linux Kernel Privilege Escalation Exploited High 8.4
• CVE-2026-53362 Linux Kernel Unspecified Exploited High 7.8

All Linux kernel vulnerabilities

Sources

• CVE record
• NVD
• OSV
• GitHub advisory
• How this page is made

Also known as DEBIAN-CVE-2019-19227, GHSA-pg7j-hxr2-g93f, UBUNTU-CVE-2019-19227.