NULL pointer dereference in Linux Kernel
CVE-2019-19227
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.
Published · last modified .
CVSS v3 metric
CVSS v3 base score 5.5 (Medium). Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H.
EPSS exploit prediction
EPSS: 0.006 (49.0th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 49th percentile — 49.0% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.006 · newest: 0.006 · change: 0.000
Affected products
Weakness classification (CWE)
Public proof-of-concept exploits
References
- git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/ (Patch, Issue Tracking, Vendor Advisory)
- cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.1 (Release Notes, Vendor Advisory)
- lists.opensuse.org/opensuse-security-announce/2019-12/msg00029.html (vendor-advisory)
- security.netapp.com/advisory/ntap-20200103-0001/
- seclists.org/bugtraq/2020/Jan/10 (mailing-list)
- packetstormsecurity.com/files/155890/Slackware-Security-Advisory-Slackware-14.2…
- lists.debian.org/debian-lts-announce/2020/01/msg00013.html (mailing-list)
- usn.ubuntu.com/4254-1/ (vendor-advisory)
- usn.ubuntu.com/4254-2/ (vendor-advisory)
- usn.ubuntu.com/4258-1/ (vendor-advisory)
Frequently asked questions
- What is CVE-2019-19227?
- CVE-2019-19227 is a medium-severity vulnerability in Linux Kernel, classified under NULL Pointer Dereference. CVSS score: 5.5/10. Published 2019-11-22.
- How severe is CVE-2019-19227?
- Medium severity. CVSS v3 base score is 5.5 out of 10.
- Is CVE-2019-19227 known to be exploited?
- 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.