An out of bounds read was discovered in systemd-journald in the way it parses log messages that terminate with a colon ':'. A local attacker can use this flaw to disclose process memory data. Versions from v221 to v239 are vulnerable.
https://www.debian.org/security/2019/dsa-4367
https://usn.ubuntu.com/3855-1/
https://security.netapp.com/advisory/ntap-20190117-0001/
https://security.gentoo.org/glsa/201903-07
https://seclists.org/bugtraq/2019/May/25
https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2018-16866
https://access.redhat.com/errata/RHSA-2020:0593
https://access.redhat.com/errata/RHSA-2019:3222
https://access.redhat.com/errata/RHSA-2019:2091
http://www.securityfocus.com/bid/106527
http://www.openwall.com/lists/oss-security/2019/05/10/4
http://seclists.org/fulldisclosure/2019/May/21
http://packetstormsecurity.com/files/152841/System-Down-A-systemd-journald-Exploit.html