CVE-2018-14345: An issue was discovered in SDDM through 0.17.0

Q: How do I fix CVE-2018-14345?

sddm: upgrade to newer than 0.17.0. Exact commands for each OS are on this page.

Q: Is CVE-2018-14345 being exploited?

CVE-2018-14345 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

Q: What does CVE-2018-14345 affect?

CVE-2018-14345 affects sddm. Severity is high (CVSS 7.5). An issue was discovered in SDDM through 0.17.0. If configured with ReuseSession=true, the password is not checked for users with an already existing session. Any user with access to the system D-Bus can therefore unlock any graphical sessio

This month

HIGH 7.5UPGRADE

CVE-2018-14345 is a high-severity flaw (CVSS 7.5) affecting sddm. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

An issue was discovered in SDDM through 0.17.0. If configured with ReuseSession=true, the password is not checked for users with an already existing session. Any user with access to the system D-Bus can therefore unlock any graphical session. This is related to daemon/Display.cpp and helper/backend/PamBackend.cpp.

Why this priority

High severity

A fixed release or distro patch exists.

Risk facts

CVSS score	7.5 (High)
Attack vector	Network (remote)
Attack complexity	High
Privileges needed	Low
User interaction	None
EPSS exploit chance	1.2% (top 32%)
CISA exploited list	No
Weakness	CWE-287, CWE-613
Published	2018-07-17
Last modified	2026-06-17

Publisher (CNA): MITRE · Vendor: sddm project

Last updated 2026-06-17 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2018-07-17 14:29 UTCPublished CVE record published
2026-06-17 01:40 UTCUpdated Record last modified

sddm project sddm UPGRADE

Affected: <= 0.17.0

Fixed in: newer than 0.17.0

Safe to downgrade to: no unaffected older release

1. Check installed version

apt-cache policy sddm || rpm -q sddm || sddm --version

2. UPGRADE to newer than 0.17.0 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade sddm

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade sddm

Note

Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2018-14345?

sddm: upgrade to newer than 0.17.0. Exact commands for each OS are on this page.

Is CVE-2018-14345 being exploited?

CVE-2018-14345 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2018-14345 affect?

CVE-2018-14345 affects sddm. Severity is high (CVSS 7.5). An issue was discovered in SDDM through 0.17.0. If configured with ReuseSession=true, the password is not checked for users with an already existing session. Any user with access to the system D-Bus can therefore unlock any graphical sessio

How urgent is CVE-2018-14345?

Priority 43/100. High severity

Related CVEs

CVE-2020-28049 MEDIUM 6.3 UPGRADE MITIGATE An issue was discovered in SDDM before 0.19.0

References

← Back to latest CVEs