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Fencer Vulns
medium 5.1

CVE-2019-20386 json

An issue was discovered in button_open in login/logind-button.c in systemd before 243.

published 2020-01-21 6 y ago modified 2026-06-17 4 mo ago also EUVD-2019-10938

cvss
5.1
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
0.4%
EPSS 0.4% chance of exploitation in 30 days, percentile 37%
public exploits
0
none known

Summary

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.

Patch / fix

  • systemd_project systemd 243
  • systemd Debian 14, Debian 13, Debian 12 243-5

debian advisories DEBIAN-CVE-2019-20386

  • systemd Ubuntu 16.04 LTS 229-4ubuntu21.27
  • systemd Ubuntu 18.04 LTS 237-3ubuntu10.38

ubuntu advisories UBUNTU-CVE-2019-20386

Ubuntu security data © Canonical Ltd., from https://github.com/canonical/ubuntu-security-notices via OSV; changed: normalised to fixed package versions per release. CC BY-SA 4.0

  • systemd RHEL 8 239-40.el8
  • systemd-pam RHEL 8 239-40.el8
  • systemd-libs RHEL 8 239-40.el8
  • systemd-udev RHEL 8 239-40.el8
  • systemd-tests RHEL 8 239-40.el8
  • systemd-container RHEL 8 239-40.el8
  • systemd-journal-remote RHEL 8 239-40.el8
  • systemd RHEL 7 219-78.el7

red hat advisories RHSA-2020:4553RHSA-2020:4007

  • systemd SLES for SAP 12 SP4, SLES 12 SP4, SLE Software Development Kit 12 SP4 228-150.86.3
  • systemd SLES for SAP 12 SP5, SLES 12 SP5, SLE Software Development Kit 12 SP5 228-157.12.5
  • systemd SLES for SAP 15, SLES 15-LTSS, SLE Module for Basesystem 15 SP1 +3 more 234-24.39.1

suse advisories SUSE-SU-2020:1842-1SUSE-SU-2020:1828-1SUSE-SU-2020:0335-1

  • systemd openSUSE Tumbleweed 249.4-2.2
  • systemd openSUSE Leap 15.1 234-lp151.26.7.1
  • systemd-mini openSUSE Leap 15.1 234-lp151.26.7.1

opensuse advisories openSUSE-SU-2024:11420-1openSUSE-SU-2020:0208-1

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2019-20386 updated cvss 2.4

systemd: memory leak in button_open() in login/logind-button.c when udev events are received

  • Red Hat OpenShift Container Platform 4 systemd, systemd-pam, systemd-libs, systemd-oomd, systemd-udev, systemd-tests, +7 more
    affected: no fix planned “Will not fix”
  • Red Hat OpenShift Do 1 openshiftdo/odo-init-image-rhel7 1.1.3-2
    fixed: vendor fix RHSA-2021:0949
  • Red Hat Enterprise Linux BaseOS (v. 8) systemd 239-40.el8, systemd-pam 239-40.el8, systemd-libs 239-40.el8, systemd-udev 239-40.el8, systemd-tests 239-40.el8, systemd-container 239-40.el8, +1 more
    fixed: vendor fix RHSA-2020:4553
  • Red Hat Enterprise Linux Client (v. 7) systemd 219-78.el7, libgudev1 219-78.el7, systemd-libs 219-78.el7, systemd-sysv 219-78.el7, systemd-python 219-78.el7, systemd-networkd 219-78.el7, +2 more Red Hat Enterprise Linux Client Optional (v. 7) systemd 219-78.el7, libgudev1 219-78.el7, systemd-libs 219-78.el7, systemd-sysv 219-78.el7, systemd-python 219-78.el7, systemd-networkd 219-78.el7, +2 more Red Hat Enterprise Linux ComputeNode (v. 7) systemd 219-78.el7, libgudev1 219-78.el7, systemd-libs 219-78.el7, systemd-sysv 219-78.el7, systemd-python 219-78.el7, systemd-networkd 219-78.el7, +2 more Red Hat Enterprise Linux ComputeNode Optional (v. 7) systemd 219-78.el7, libgudev1 219-78.el7, systemd-libs 219-78.el7, systemd-sysv 219-78.el7, systemd-python 219-78.el7, systemd-networkd 219-78.el7, +2 more Red Hat Enterprise Linux Server (v. 7) systemd 219-78.el7, libgudev1 219-78.el7, systemd-libs 219-78.el7, systemd-sysv 219-78.el7, systemd-python 219-78.el7, systemd-networkd 219-78.el7, +2 more Red Hat Enterprise Linux Server Optional (v. 7) systemd 219-78.el7, libgudev1 219-78.el7, systemd-libs 219-78.el7, systemd-sysv 219-78.el7, systemd-python 219-78.el7, systemd-networkd 219-78.el7, +2 more
    +2 more products
    Red Hat Enterprise Linux Workstation (v. 7) systemd 219-78.el7, libgudev1 219-78.el7, systemd-libs 219-78.el7, systemd-sysv 219-78.el7, systemd-python 219-78.el7, systemd-networkd 219-78.el7, +2 more Red Hat Enterprise Linux Workstation Optional (v. 7) systemd 219-78.el7, libgudev1 219-78.el7, systemd-libs 219-78.el7, systemd-sysv 219-78.el7, systemd-python 219-78.el7, systemd-networkd 219-78.el7, +2 more
    fixed: vendor fix RHSA-2020:4007

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

CISA SSVC

Exploitation
none
Automatable
no
Technical impact
partial
Assessed
17 mo ago

Exploit prediction

0.43% chance of exploitation in the next 30 days, higher than 37% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by version score vector
CISA ADP 3.1 5.1 CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N
NVD 3.1 2.4 CVSS:3.1/AV:P/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
CNA 3.1 5.1 CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N
NVD 2.0 2.1 AV:L/AC:L/Au:N/C:N/I:N/A:P

Classification

Weakness
  • CWE-401 Missing Release of Memory after Effective Lifetime

References

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.