security/keys/keyctl.c in the Linux kernel before 4.11.5 does not consider the case of a NULL payload in conjunction with a nonzero length value, which allows local users to cause a denial of service (NULL pointer dereference and OOPS) via a crafted add_key or keyctl system call, a different vulnerability than CVE-2017-12192.
http://www.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.11.5
http://www.securityfocus.com/bid/101292
https://access.redhat.com/errata/RHSA-2019:1946
https://bugzilla.suse.com/show_bug.cgi?id=1045327
https://github.com/torvalds/linux/commit/5649645d725c73df4302428ee4e02c869248b4c5
https://patchwork.kernel.org/patch/9781573/
Source: MITRE
Published: 2017-10-12
Updated: 2018-03-16
Type: CWE-476
Base Score: 4.9
Vector: AV:L/AC:L/Au:N/C:N/I:N/A:C
Impact Score: 6.9
Exploitability Score: 3.9
Severity: MEDIUM
Base Score: 5.5
Vector: CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Impact Score: 3.6
Exploitability Score: 1.8
Severity: MEDIUM