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NVD / CVE Program· CNA mitre

CVE-2019-20386: An issue was discovered in button_open in login/logind-button.c in systemd before 243.

Noroxi assessment

Priority: Monitor (action score 9/100)

  • The sources we track (CISA KEV, Exploit-DB, Metasploit, Nuclei, GitHub) show no public exploit code or exploitation in the wild.
  • Probability of exploitation in the next 30 days: 0.42% (FIRST EPSS).
  • Physical access to the device is required. No account or password is required. No user action is required. No special conditions are required; it is repeatable.
  • Fixed version: systemd (Debian:12) 243-5; systemd (openSUSE:Leap 15.1) 234-lp151.26.7.1; systemd-mini (openSUSE:Leap 15.1) 234-lp151.26.7.1.
  • Mentioned 1 time in Turkish national cyber security advisories (siberguvenlik.gov.tr).

Low priority for now. Upgrade to systemd (Debian:12) 243-5; systemd (openSUSE:Leap 15.1) 234-lp151.26.7.1; systemd-mini (openSUSE:Leap 15.1) 234-lp151.26.7.1 or later.

Generated automatically from the record's data: CVSS (NVD and CNA), CISA KEV and SSVC, FIRST EPSS, exploit sources, fixed versions. How we calculate it

Primary sources: NVD · CVE.org · FIRST EPSS

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.

LowCVSS 2.4 · v3.1—No exploit Fix available
Published
Jan 21, 2020
Updated
Jun 16, 2026
EPSS
0.4% · 36th percentile

Report tools

JSON

Action score

9

Monitor

Low priority for now.

CVSS
9 / 40 · 2.4 / 10
CISA KEV
0 / 30 · Not listed
EPSS
0 / 30 · 0.4%

CISA SSVC decision

Exploitation
none
Automatable
no
Technical impact
partial

Vulnrichment: CISA's decision-tree inputs.

Get told when this record changes

  • Not in KEV: no record of exploitation in the wild
  • No public exploit code on record
  • A fix has been released

If any of these changes, we'll tell you in the daily email digest.

Follow CVE-2019-20386

When you'll hear from us

  • when it enters CISA KEV
  • when exploit code appears or is weaponized
  • when the record is updated (including a fixed version)
  • when EPSS rises 20 points in a week

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Noroxi analysis

What does it mean in your environment?

The assessment above is generated automatically from the record's data; it doesn't know your environment. Our team verifies on your systems whether this vulnerability is actually exploitable and which mitigation is enough.

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Affected systems

Is your version affected?

Pick the product and type the version you run. It's compared with this record's version ranges in your browser; the version isn't sent anywhere.

VendorProduct
systemd projectsystemd
canonicalubuntu linux
fedoraprojectfedora
opensuseleap
netappactive iq unified manager
netappcloud backup
netappsteelstore cloud integrated storage

Affected versions

NVD version ranges (for catalog products). Add the product to your stack with a version and matching uses these.

  • canonical ubuntu linux16.04
  • canonical ubuntu linux18.04
  • canonical ubuntu linux19.10
  • fedoraproject fedora30
  • netapp active iq unified managerall versions
  • netapp cloud backupall versions
  • netapp steelstore cloud integrated storageall versions
  • opensuse leap15.1
  • systemd project systemdbefore 243

Package-level exposure

OSV and GitHub Advisory data: ecosystem, package and range. SBOM matching uses this table.

EcosystemPackageAffected rangeFix
Debian:12systemdbefore 243-5243-5
openSUSE:Leap 15.1systemdbefore 234-lp151.26.7.1234-lp151.26.7.1
openSUSE:Leap 15.1systemd-minibefore 234-lp151.26.7.1234-lp151.26.7.1
openSUSE:Tumbleweedsystemdbefore 249.4-2.2249.4-2.2
Red Hat:enterprise_linux:7::clientlibgudev1before 0:219-78.el70:219-78.el7
Red Hat:enterprise_linux:7::clientlibgudev1-develbefore 0:219-78.el70:219-78.el7
Red Hat:enterprise_linux:7::clientsystemdbefore 0:219-78.el70:219-78.el7
Red Hat:enterprise_linux:7::clientsystemd-debuginfobefore 0:219-78.el70:219-78.el7
Red Hat:enterprise_linux:7::clientsystemd-develbefore 0:219-78.el70:219-78.el7
Red Hat:enterprise_linux:7::clientsystemd-journal-gatewaybefore 0:219-78.el70:219-78.el7
Red Hat:enterprise_linux:7::clientsystemd-libsbefore 0:219-78.el70:219-78.el7
Red Hat:enterprise_linux:7::clientsystemd-networkdbefore 0:219-78.el70:219-78.el7
Red Hat:enterprise_linux:7::clientsystemd-pythonbefore 0:219-78.el70:219-78.el7
Red Hat:enterprise_linux:7::clientsystemd-resolvedbefore 0:219-78.el70:219-78.el7
Red Hat:enterprise_linux:7::clientsystemd-sysvbefore 0:219-78.el70:219-78.el7
Red Hat:enterprise_linux:8::baseossystemdbefore 0:239-40.el80:239-40.el8
Red Hat:enterprise_linux:8::baseossystemd-containerbefore 0:239-40.el80:239-40.el8
Red Hat:enterprise_linux:8::baseossystemd-container-debuginfobefore 0:239-40.el80:239-40.el8
Red Hat:enterprise_linux:8::baseossystemd-debuginfobefore 0:239-40.el80:239-40.el8
Red Hat:enterprise_linux:8::baseossystemd-debugsourcebefore 0:239-40.el80:239-40.el8
Red Hat:enterprise_linux:8::baseossystemd-develbefore 0:239-40.el80:239-40.el8
Red Hat:enterprise_linux:8::baseossystemd-journal-remotebefore 0:239-40.el80:239-40.el8
Red Hat:enterprise_linux:8::baseossystemd-journal-remote-debuginfobefore 0:239-40.el80:239-40.el8
Red Hat:enterprise_linux:8::baseossystemd-libsbefore 0:239-40.el80:239-40.el8

+10

Same product

systemd project: all records

Other highest-scoring records for the same primary product.

  • CVE-2017-9445In systemd through 233, certain sizes passed to dns_packet_new in systemd-resolved can cause it to allocate a buffer that's too small.
    46Plan
  • CVE-2018-21029systemd 239 through 245 accepts any certificate signed by a trusted certificate authority for DNS Over TLS.
    40Plan
  • CVE-2015-7510Stack-based buffer overflow in the getpwnam and getgrnam functions of the NSS module nss-mymachines in systemd.
    40Plan

Published before and after this one in the same product

  • ← EarlierCVE-2018-20839May 17, 2019 · systemd 242 changes the VT1 mode upon a logout, which allows attackers to read cleartext passwords in certain circumstances, such as watchin
    18Monitor
  • ← EarlierCVE-2019-15718Sep 4, 2019 · In systemd 240, bus_open_system_watch_bind_with_description in shared/bus-util.c (as used by systemd-resolved to connect to the system D-Bus
    17Monitor
  • Later →CVE-2012-1101Mar 11, 2020 · systemd 37-1 does not properly handle non-existent services, which causes a denial of service (failure of login procedure).
    22Monitor

Remediation

Which version to upgrade to

Fix versions compiled from the vendor, package registries and Microsoft. Verify the vendor's note before upgrading.

Product / packageFixed versionSource
debian:systemd243-5 · Debian:12Package registry (OSV)
opensuse:systemd234-lp151.26.7.1 · openSUSE:Leap 15.1Package registry (OSV)
opensuse:systemd-mini234-lp151.26.7.1 · openSUSE:Leap 15.1Package registry (OSV)
red hat:libgudev10:219-78.el7 · Red Hat:enterprise_linux:7::clientPackage registry (OSV)
red hat:libgudev1-devel0:219-78.el7 · Red Hat:enterprise_linux:7::clientPackage registry (OSV)
red hat:systemd0:219-78.el7 · Red Hat:enterprise_linux:7::clientPackage registry (OSV)
red hat:systemd-container0:239-40.el8 · Red Hat:enterprise_linux:8::baseosPackage registry (OSV)
red hat:systemd-debuginfo0:219-78.el7 · Red Hat:enterprise_linux:7::clientPackage registry (OSV)
red hat:systemd-devel0:219-78.el7 · Red Hat:enterprise_linux:7::clientPackage registry (OSV)
red hat:systemd-journal-gateway0:219-78.el7 · Red Hat:enterprise_linux:7::clientPackage registry (OSV)
red hat:systemd-libs0:219-78.el7 · Red Hat:enterprise_linux:7::clientPackage registry (OSV)
red hat:systemd-networkd0:219-78.el7 · Red Hat:enterprise_linux:7::clientPackage registry (OSV)
red hat:systemd-python0:219-78.el7 · Red Hat:enterprise_linux:7::clientPackage registry (OSV)
red hat:systemd-resolved0:219-78.el7 · Red Hat:enterprise_linux:7::clientPackage registry (OSV)
red hat:systemd-sysv0:219-78.el7 · Red Hat:enterprise_linux:7::clientPackage registry (OSV)
suse:systemd234-24.39.1 · SUSE:Linux Enterprise Module for Basesystem 15Package registry (OSV)

Exploit status

No known public exploit

No public exploit has been observed yet. That doesn't mean you're safe, only that the bar is a little higher.

Research context

For pentesters and researchers: attack profile, score disagreement, timeline, patch commits, credits, variant and chain candidates, bug bounty scope. All derived from existing data; no exploit code.

Timeline

From publication to today: proof of concept, Metasploit module, CISA KEV and fix record. Dates are as reported by the sources.

No dated events beyond publication.

No history yet (it accumulates with the daily EPSS job).

Patch and commit links

Commit, PR and diff links among the references. A starting point for patch-diffing and variant hunting; fixes, not exploits.

Credits

All researchers

Finders, reporters and analysts named in the CNA record. Click a name for that researcher’s other records.

No credits in the CNA record.

Variant candidates

Same product, same weakness class, within 18 months. If the patch missed the root cause, the sibling bug is here.

No nightly-computed relations.

Chain candidates

An authentication bypass and a privilege-requiring bug in the same product, published close together: combined they may become an unauthenticated path.

—

Bug bounty scope

No known public program.

Source: bounty-targets-data (public HackerOne, Bugcrowd, Intigriti, YesWeHack listings).

National notice (Türkiye Cybersecurity Directorate / USOM)

Official security notices citing this record; remediation advice is on the agency's page.

All national notices →

Technical details

Attack conditions

  • Physical access to the device is required.
  • No account or password is required.
  • No user action is required.
  • No special conditions are required; it is repeatable.

If successful

Confidentiality
none
Integrity
none
Availability
low · the service can be disrupted
Attack vector
Physical
Attack complexity
Low
Privileges required
None
User interaction
None
Scope
Unchanged
Confidentiality impact
None
Integrity impact
None
Availability impact
Low

Weakness class (CWE)

CWE-401 · Missing Release of Memory after Effective Lifetime

CVSS vector

CVSS:3.1/AV:P/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L

nvd-primary

Attack context

MITRE CAPEC attack patterns and ATT&CK techniques for this weakness class (CWE). A starting point for detection rules and threat hunting.

MITRE has no CAPEC/ATT&CK mapping for this CWE.

Change log

  1. Fix✗ → ✓

For records you follow, these changes also arrive as notifications. →

References

Show all references (4 more)

Vendor advisories and official records. Exploit/PoC links are deliberately left out.

All records