CVE-2019-20386

Severity: low (CVSS 2.4 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.4% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2020-01-21 · updated 2026-06-17
Weakness: CWE-401

Description

An issue was discovered in button_open in login/logind-button.c in systemd before 243. When executing the udevadm trigger command, a memory leak may occur.

Affected products

Canonical Ubuntu Linux: 16.04, 18.04, 19.10
Fedoraproject Fedora: 30
Active IQ Unified Manager for VMware vSphere, Linux, and Microsoft Windows: all versions
NetApp Cloud Backup: all versions
NetApp Steelstore Cloud Integrated Storage: all versions
openSUSE Leap: 15.1
systemd: before 243 — fixed in 243

How to fix

Upgrade to a fixed version: systemd 243. Check the vendor advisory for mitigations.

References

http://lists.opensuse.org/opensuse-security-announce/2020-02/msg00014.html
https://github.com/systemd/systemd/commit/b2774a3ae692113e1f47a336a6c09bac9cfb49ad
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/HZPCOMW5X6IZZXASCDD2CNW2DLF3YADC/
https://security.netapp.com/advisory/ntap-20200210-0002/
https://usn.ubuntu.com/4269-1/
http://lists.opensuse.org/opensuse-security-announce/2020-02/msg00014.html
https://github.com/systemd/systemd/commit/b2774a3ae692113e1f47a336a6c09bac9cfb49ad
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/HZPCOMW5X6IZZXASCDD2CNW2DLF3YADC/
https://security.netapp.com/advisory/ntap-20200210-0002/
https://usn.ubuntu.com/4269-1/

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