CVE-2019-3844

HIGH

7.8

CVSS v3

Description

It was discovered that a systemd service that uses DynamicUser property can get new privileges through the execution of SUID binaries, which would allow to create binaries owned by the service transient group with the setgid bit set. A local attacker may use this flaw to access resources that will be owned by a potentially different service in the future, when the GID will be recycled.

CWE-268

How to fix

Remediation Available

systemdDebian

Fixed in:242-4CVE-2019-3844

systemdUbuntu

Fixed in:229-4ubuntu21.27USN-4269-1

Fixed in:237-3ubuntu10.38USN-4269-1

TridentStack Control can deploy fixes like this automatically across your Windows, macOS, and Linux fleet. See how it works

Remediation is compiled from vendor and distribution security advisories. Always confirm against the linked source for your exact version and platform.

CVSS v3 Vector

Exploitability

Attack VectorLocal

Attack ComplexityLow

Privileges RequiredLow

User InteractionNone

ScopeUnchanged

Impact

ConfidentialityHigh

IntegrityHigh

AvailabilityHigh

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

Exploit Intelligence

0.92%probability of exploitation in 30 days

57thpercentile

Moderate risk: more likely to be exploited than 57% of all known CVEs.

References

Patch1

bugzilla.redhat.com

Third-Party Advisory3

Other references2

Related Vulnerabilities

Other CWE-268 vulnerabilities, ordered by exploit likelihood. View all

CVE	Severity	CVSS	EPSS	Exploited	Fix
CVE-2025-49741	High	7.4	3.5%	-	Fix
CVE-2024-1250	Medium	6.5	0.5%	-	Fix
CVE-2024-1299	Medium	6.5	0.5%	-	Fix
CVE-2023-20194	Medium	4.9	0.5%	-	-
CVE-2022-1003	Low	3.3	0.5%	-	Fix
CVE-2024-4877	High	8.8	0.4%	-	Fix

Common questions

How do I fix CVE-2019-3844?

Published advisories record a fix for 2 affected products. The "How to fix" section on this page lists the fixed version and source advisory for each one, so apply the entry matching what you actually run.

Is CVE-2019-3844 being actively exploited?

Not that we know of. CVE-2019-3844 is not in the CISA Known Exploited Vulnerabilities catalog. Its EPSS score of 0.92% is the estimated probability that it will be exploited in the next 30 days. That is higher than 57% of all scored CVEs.

How severe is CVE-2019-3844?

CVE-2019-3844 has a CVSS v3 base score of 7.8, rated high. CVSS rates the technical impact if the vulnerability is exploited, not how likely that is, so weigh it alongside the exploit-prediction score when you decide what to patch first.

What does CVE-2019-3844 affect?

Published advisories record a fix for systemd (Debian), systemd (Ubuntu). Only products with a sourced advisory are listed, so treat this as what we can cite rather than a complete inventory.

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This product uses NVD data but is not endorsed or certified by the NVD. EPSS scores courtesy of FIRST.org (https://www.first.org/epss). Source: CISA KEV Catalog. Data as of 2024-11-21.