CVE-2019-19227

NameCVE-2019-19227
DescriptionIn 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.
SourceCVE (at NVD; CERT, LWN, oss-sec, fulldisc, bugtraq, EDB, Metasploit, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, Mageia, GitHub code/issues, web search, more)
NVD severitylow

Vulnerable and fixed packages

The table below lists information on source packages.

Source PackageReleaseVersionStatus
linux (PTS)jessie3.16.56-1+deb8u1vulnerable
jessie (security)3.16.76-1vulnerable
stretch4.9.189-3vulnerable
stretch (security)4.9.189-3+deb9u2vulnerable
buster4.19.67-2+deb10u1vulnerable
buster (security)4.19.67-2+deb10u2vulnerable
bullseye5.3.9-3fixed
sid5.3.15-1fixed

The information below is based on the following data on fixed versions.

PackageTypeReleaseFixed VersionUrgencyOriginDebian Bugs
linuxsource(unstable)5.2.6-1

Notes

https://git.kernel.org/linus/9804501fa1228048857910a6bf23e085aade37cc

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