CVE-2020-16125

mediumpriority · track · 37EPSS 0.011 · 66 %ileexploit · PoCEUUS

grimoire priorityP1 · Urgent

Exploitable?

Public exploit

1 exploit · PoC

Likely / severe?

1.11% (66th) EPSS

CVSS 4.6 · medium

Is it mine?

1,259 products

Check your exposure

Who says so?

4 sources

cnnvd · enisa_euvd · nvd · redhat_csaf

EPSS · scored 2026-10-27

gdm3 versions before 3.36.2 or 3.38.2 would start gnome-initial-setup if gdm3 can't contact the accountservice service via dbus in a timely manner; on Ubuntu (and potentially derivatives) this could be be chained with an additional issue that could allow a local user to create a new privileged account.

remediations

Vendor fix, mitigation, or workaround guidance, as published by each source.

A vendor fix is available.

Fixedgdm-1:3.28.3-39.el8.aarch64 as a component of Red Hat Enterprise Linux AppStream (v. 8)redhat_csaf
For details on how to apply this update, which includes the changes described in this advisory, refer to: https://access.redhat.com/articles/11258 GDM must be restarted for this update to take effect.
https://access.redhat.com/errata/RHSA-2021:1586
Fixedgdm-1:3.28.3-39.el8.i686 as a component of Red Hat Enterprise Linux AppStream (v. 8)redhat_csaf
For details on how to apply this update, which includes the changes described in this advisory, refer to: https://access.redhat.com/articles/11258 GDM must be restarted for this update to take effect.
https://access.redhat.com/errata/RHSA-2021:1586
Fixedgdm-1:3.28.3-39.el8.ppc64le as a component of Red Hat Enterprise Linux AppStream (v. 8)redhat_csaf
For details on how to apply this update, which includes the changes described in this advisory, refer to: https://access.redhat.com/articles/11258 GDM must be restarted for this update to take effect.
https://access.redhat.com/errata/RHSA-2021:1586
Fixedgdm-1:3.28.3-39.el8.s390x as a component of Red Hat Enterprise Linux AppStream (v. 8)redhat_csaf
For details on how to apply this update, which includes the changes described in this advisory, refer to: https://access.redhat.com/articles/11258 GDM must be restarted for this update to take effect.
https://access.redhat.com/errata/RHSA-2021:1586
Fixedgdm-1:3.28.3-39.el8.src as a component of Red Hat Enterprise Linux AppStream (v. 8)redhat_csaf
For details on how to apply this update, which includes the changes described in this advisory, refer to: https://access.redhat.com/articles/11258 GDM must be restarted for this update to take effect.
https://access.redhat.com/errata/RHSA-2021:1586
Fixedgdm-1:3.28.3-39.el8.x86_64 as a component of Red Hat Enterprise Linux AppStream (v. 8)redhat_csaf
For details on how to apply this update, which includes the changes described in this advisory, refer to: https://access.redhat.com/articles/11258 GDM must be restarted for this update to take effect.
https://access.redhat.com/errata/RHSA-2021:1586
Fixedgdm-debuginfo-1:3.28.3-39.el8.aarch64 as a component of Red Hat Enterprise Linux AppStream (v. 8)redhat_csaf
For details on how to apply this update, which includes the changes described in this advisory, refer to: https://access.redhat.com/articles/11258 GDM must be restarted for this update to take effect.
https://access.redhat.com/errata/RHSA-2021:1586
Fixedgdm-debuginfo-1:3.28.3-39.el8.i686 as a component of Red Hat Enterprise Linux AppStream (v. 8)redhat_csaf
For details on how to apply this update, which includes the changes described in this advisory, refer to: https://access.redhat.com/articles/11258 GDM must be restarted for this update to take effect.
https://access.redhat.com/errata/RHSA-2021:1586
Fixedgdm-debuginfo-1:3.28.3-39.el8.ppc64le as a component of Red Hat Enterprise Linux AppStream (v. 8)redhat_csaf
For details on how to apply this update, which includes the changes described in this advisory, refer to: https://access.redhat.com/articles/11258 GDM must be restarted for this update to take effect.
https://access.redhat.com/errata/RHSA-2021:1586
Fixedgdm-debuginfo-1:3.28.3-39.el8.s390x as a component of Red Hat Enterprise Linux AppStream (v. 8)redhat_csaf
For details on how to apply this update, which includes the changes described in this advisory, refer to: https://access.redhat.com/articles/11258 GDM must be restarted for this update to take effect.
https://access.redhat.com/errata/RHSA-2021:1586
Fixedgdm-debuginfo-1:3.28.3-39.el8.x86_64 as a component of Red Hat Enterprise Linux AppStream (v. 8)redhat_csaf
For details on how to apply this update, which includes the changes described in this advisory, refer to: https://access.redhat.com/articles/11258 GDM must be restarted for this update to take effect.
https://access.redhat.com/errata/RHSA-2021:1586
Fixedgdm-debugsource-1:3.28.3-39.el8.aarch64 as a component of Red Hat Enterprise Linux AppStream (v. 8)redhat_csaf
For details on how to apply this update, which includes the changes described in this advisory, refer to: https://access.redhat.com/articles/11258 GDM must be restarted for this update to take effect.
https://access.redhat.com/errata/RHSA-2021:1586
Fixedgdm-debugsource-1:3.28.3-39.el8.i686 as a component of Red Hat Enterprise Linux AppStream (v. 8)redhat_csaf
For details on how to apply this update, which includes the changes described in this advisory, refer to: https://access.redhat.com/articles/11258 GDM must be restarted for this update to take effect.
https://access.redhat.com/errata/RHSA-2021:1586
Fixedgdm-debugsource-1:3.28.3-39.el8.ppc64le as a component of Red Hat Enterprise Linux AppStream (v. 8)redhat_csaf
For details on how to apply this update, which includes the changes described in this advisory, refer to: https://access.redhat.com/articles/11258 GDM must be restarted for this update to take effect.
https://access.redhat.com/errata/RHSA-2021:1586
Fixedgdm-debugsource-1:3.28.3-39.el8.s390x as a component of Red Hat Enterprise Linux AppStream (v. 8)redhat_csaf
For details on how to apply this update, which includes the changes described in this advisory, refer to: https://access.redhat.com/articles/11258 GDM must be restarted for this update to take effect.
https://access.redhat.com/errata/RHSA-2021:1586
Fixedgdm-debugsource-1:3.28.3-39.el8.x86_64 as a component of Red Hat Enterprise Linux AppStream (v. 8)redhat_csaf
For details on how to apply this update, which includes the changes described in this advisory, refer to: https://access.redhat.com/articles/11258 GDM must be restarted for this update to take effect.
https://access.redhat.com/errata/RHSA-2021:1586

cvss

Technical severity, 0–10. One row per scoring source.

7.2

010

base score 0–10 · higher = more severe · hover a vector to decode⚠ sources disagree · medium–high · 4.6–7.2

v2.04.6mediumAV:L/AC:L/Au:N/C:P/I:P/A:Pprimary · NVD / NIST USexploitability 3.9 · impact 6.4

v3.16.8mediumCVSS:3.1/AV:P/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:Hprimary · NVD / NIST USexploitability 0.9 · impact 5.9

v3.17.2highCVSS:3.1/AV:P/AC:L/PR:L/UI:R/S:C/C:H/I:H/A:Hsecondary · ENISA EU

v3.17.2highCVSS:3.1/AV:P/AC:L/PR:L/UI:R/S:C/C:H/I:H/A:Hsecondary · security@ubuntu.comexploitability 0.5 · impact 6

v3.16.4mediumCVSS:3.1/AV:P/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H/E:Psecondary · CVSS-BT (t0sche)

v3.16.4mediumCVSS:3.1/AV:P/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:Hsecondary · Red Hat Product Security US

weaknesses

The CWE weakness classes this flaw belongs to.

CWE-754USprimaryCWE-636US

exploits (1)

Public proof-of-concept and weaponised exploit code.

za970120604/CVE-2020-16125-Reproductionza970120604/CVE-2020-16125-ReproductionPoC · poc_in_github

affected products (1,259)

Products and version ranges known to be affected.

Gnome GDM33.36 → 3.36.4enisa_euvdEU
Gnome GDM33.38 → 3.38.2enisa_euvdEU
gnome gnome display manager< 3.36.2nvdUScpe:2.3:a:gnome:gnome_display_manager:*:*:*:*:*:*:*:*
gnome gnome display manager3.38.0 → 3.38.2nvdUScpe:2.3:a:gnome:gnome_display_manager:*:*:*:*:*:*:*:*
OpenEXR-0:2.2.0-12.el8.src as a component of Red Hat Enterprise Linux AppStream (v. 8)all versionsnot affectedredhat_csafUS
OpenEXR-debuginfo-0:2.2.0-12.el8.aarch64 as a component of Red Hat CodeReady Linux Builder (v. 8)all versionsnot affectedredhat_csafUS
OpenEXR-debuginfo-0:2.2.0-12.el8.aarch64 as a component of Red Hat Enterprise Linux AppStream (v. 8)all versionsnot affectedredhat_csafUS
OpenEXR-debuginfo-0:2.2.0-12.el8.i686 as a component of Red Hat CodeReady Linux Builder (v. 8)all versionsnot affectedredhat_csafUS
OpenEXR-debuginfo-0:2.2.0-12.el8.i686 as a component of Red Hat Enterprise Linux AppStream (v. 8)all versionsnot affectedredhat_csafUS
OpenEXR-debuginfo-0:2.2.0-12.el8.ppc64le as a component of Red Hat CodeReady Linux Builder (v. 8)all versionsnot affectedredhat_csafUS
OpenEXR-debuginfo-0:2.2.0-12.el8.ppc64le as a component of Red Hat Enterprise Linux AppStream (v. 8)all versionsnot affectedredhat_csafUS
OpenEXR-debuginfo-0:2.2.0-12.el8.s390x as a component of Red Hat CodeReady Linux Builder (v. 8)all versionsnot affectedredhat_csafUS
OpenEXR-debuginfo-0:2.2.0-12.el8.s390x as a component of Red Hat Enterprise Linux AppStream (v. 8)all versionsnot affectedredhat_csafUS
OpenEXR-debuginfo-0:2.2.0-12.el8.x86_64 as a component of Red Hat CodeReady Linux Builder (v. 8)all versionsnot affectedredhat_csafUS
OpenEXR-debuginfo-0:2.2.0-12.el8.x86_64 as a component of Red Hat Enterprise Linux AppStream (v. 8)all versionsnot affectedredhat_csafUS
OpenEXR-debugsource-0:2.2.0-12.el8.aarch64 as a component of Red Hat CodeReady Linux Builder (v. 8)all versionsnot affectedredhat_csafUS
OpenEXR-debugsource-0:2.2.0-12.el8.aarch64 as a component of Red Hat Enterprise Linux AppStream (v. 8)all versionsnot affectedredhat_csafUS
OpenEXR-debugsource-0:2.2.0-12.el8.i686 as a component of Red Hat CodeReady Linux Builder (v. 8)all versionsnot affectedredhat_csafUS
OpenEXR-debugsource-0:2.2.0-12.el8.i686 as a component of Red Hat Enterprise Linux AppStream (v. 8)all versionsnot affectedredhat_csafUS
OpenEXR-debugsource-0:2.2.0-12.el8.ppc64le as a component of Red Hat CodeReady Linux Builder (v. 8)all versionsnot affectedredhat_csafUS

showing 20 of 1,259

advisories (1)

Vendor and ecosystem advisories describing this.

RHSA-2021:1586Red Hat Security Advisory: GNOME security, bug fix, and enhancement update2021-05-18csaf · redhat_csafUS
An update for GNOME is now available for Red Hat Enterprise Linux 8. Red Hat Product Security has rated this update as having a security impact of Moderate. A Common Vulnerability Scoring System (CVSS) base score, which gives a detailed severity rating, is available for each vulnerability from the CVE link(s) in the References section.

also known as (3)

Other names and identifiers for this entity.

sources

Which sources assert this record, and when.

cnnvd enisa_euvd nvd redhat_csaf NVD CVE.org MITRE

published 2020-11-10modified 2026-06-17

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Related entries.

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references (17)

External citations — patches, advisories, analysis.

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