{"id":"CVE-2019-19227","details":"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.","modified":"2026-03-12T23:05:35.989565Z","published":"2019-11-22T14:15:11.323Z","related":["SUSE-SU-2019:3200-1","SUSE-SU-2019:3289-1","SUSE-SU-2019:3316-1","SUSE-SU-2019:3317-1","SUSE-SU-2019:3371-1","SUSE-SU-2019:3372-1","SUSE-SU-2019:3381-1","SUSE-SU-2020:0093-1","SUSE-SU-2020:0599-1","SUSE-SU-2020:0613-1","SUSE-SU-2020:14354-1","openSUSE-SU-2019:2675-1"],"references":[{"type":"WEB","url":"http://packetstormsecurity.com/files/155890/Slackware-Security-Advisory-Slackware-14.2-kernel-Updates.html"},{"type":"WEB","url":"https://usn.ubuntu.com/4258-1/"},{"type":"WEB","url":"https://usn.ubuntu.com/4287-2/"},{"type":"WEB","url":"http://lists.opensuse.org/opensuse-security-announce/2019-12/msg00029.html"},{"type":"WEB","url":"https://lists.debian.org/debian-lts-announce/2020/01/msg00013.html"},{"type":"WEB","url":"https://lists.debian.org/debian-lts-announce/2020/03/msg00001.html"},{"type":"WEB","url":"https://seclists.org/bugtraq/2020/Jan/10"},{"type":"WEB","url":"https://usn.ubuntu.com/4254-1/"},{"type":"WEB","url":"https://usn.ubuntu.com/4254-2/"},{"type":"WEB","url":"https://usn.ubuntu.com/4287-1/"},{"type":"ADVISORY","url":"https://cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.1"},{"type":"ADVISORY","url":"https://security.netapp.com/advisory/ntap-20200103-0001/"},{"type":"FIX","url":"https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=9804501fa1228048857910a6bf23e085aade37cc"}],"affected":[{"database_specific":{"source":"https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2019-19227.json","unresolved_ranges":[{"events":[{"introduced":"0"},{"fixed":"5.1"}]}]}}],"schema_version":"1.7.5","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H"}]}