HOMEVULNERABILITIESCVE-2019-3843
HIGHPOC

CVE-2019-3843

CWE-266Published: April 26, 2019· Updated: Jun 17, 2026

7.8
CVSS v3.1

Official Description

It was discovered that a systemd service that uses DynamicUser property can create a SUID/SGID binary that would be allowed to run as the transient service UID/GID even after the service is terminated. A local attacker may use this flaw to access resources that will be owned by a potentially different service in the future, when the UID/GID will be recycled.

NVD Source

Technical Analysis

CVE-2019-3843 requires local access, meaning attackers must already have a foothold on the target system.

Exploitation requires low privileges, which limits the exposure to scenarios where an attacker has already gained initial access.

A successful exploit results in complete confidentiality breach (data exposure), full integrity compromise (data manipulation), availability disruption (denial of service), with a CVSS base score of 7.8.

A proof-of-concept (PoC) exploit exists for CVE-2019-3843. While not yet confirmed in active campaigns, the availability of PoC code increases exploitation risk substantially.

CVSS v3.1 Vector Breakdown

Exploitability
Attack VectorLocal
Attack ComplexityLow
Privileges Req.Low
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

Affected Vendors & Products

Canonical1 product(s)
ubuntu linux
Fedora1 product(s)
fedora
netapp5 product(s)
hci management nodesnapprotectsolidfirecn1610 firmwarecn1610
systemd_project1 product(s)
systemd
Source: NVD CPE · 10 total CPE entries

Exploit & PoC Resources

POC AVAILABLEProof-of-concept code exists
Exploit-DB
Offensive Security exploit database
GitHub PoC Search
Community PoC repositories
Rapid7 / Metasploit
Metasploit module search
PacketStorm
Security advisories & exploits
NVD Detail
Official NIST entry
MITRE CVE
CVE Program entry
External links open in a new tab. Always verify in a controlled environment before use.

Official Patches & Advisories

PATCHhttps://bugzilla.redhat.com/show_bug.cgi?id=CVE-2019-3843
PATCHhttps://bugzilla.redhat.com/show_bug.cgi?id=CVE-2019-3843
ADVISORYhttp://www.securityfocus.com/bid/108116
ADVISORYhttps://security.netapp.com/advisory/ntap-20190619-0002/
ADVISORYhttps://usn.ubuntu.com/4269-1/
ADVISORYhttp://www.securityfocus.com/bid/108116
ADVISORYhttps://security.netapp.com/advisory/ntap-20190619-0002/
ADVISORYhttps://usn.ubuntu.com/4269-1/

All References (14)

→
http://www.securityfocus.com/bid/108116Third Party Advisory · VDB Entry
→
https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2019-3843Issue Tracking · Patch · Third Party Advisory
→
https://lists.apache.org/thread.html/r58af02e294bd07f487e2c64ffc0a29b837db5600e33b6e698b9d696b%40%3Cissues.bookkeeper.apache.org%3E
→
https://lists.apache.org/thread.html/rf4c02775860db415b4955778a131c2795223f61cb8c6a450893651e4%40%3Cissues.bookkeeper.apache.org%3E
→
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/5JXQAKSTMABZ46EVCRMW62DHWYHTTFES/
→
https://security.netapp.com/advisory/ntap-20190619-0002/Third Party Advisory
→
https://usn.ubuntu.com/4269-1/Third Party Advisory
→
http://www.securityfocus.com/bid/108116Third Party Advisory · VDB Entry
→
https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2019-3843Issue Tracking · Patch · Third Party Advisory
→
https://lists.apache.org/thread.html/r58af02e294bd07f487e2c64ffc0a29b837db5600e33b6e698b9d696b%40%3Cissues.bookkeeper.apache.org%3E
→
https://lists.apache.org/thread.html/rf4c02775860db415b4955778a131c2795223f61cb8c6a450893651e4%40%3Cissues.bookkeeper.apache.org%3E
→
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/5JXQAKSTMABZ46EVCRMW62DHWYHTTFES/
→
https://security.netapp.com/advisory/ntap-20190619-0002/Third Party Advisory
→
https://usn.ubuntu.com/4269-1/Third Party Advisory

Quick Facts

CVE IDCVE-2019-3843
CVSS Score7.8 / 10
SeverityHIGH
WeaknessCWE-266
CISA KEVNo
ExploitPOC
Affected4 vendor(s)
PublishedApr 26, 2019

Related CVEs (CWE-266)

CVE-2024-9479
10.0
CVE-2024-9478
10.0
CVE-2025-10725
9.9
CVE-2025-8795
9.9
CVE-2019-10940
9.9
CVE-2025-62645
9.9

Recommended Actions

  • →Apply vendor patches immediately
  • →Monitor CVE-2019-3843 in threat intel feeds
  • →Review IDS/IPS signatures for exploitation attempts
Data sourced from NVD (NIST), CISA KEV, and EPSS (FIRST). Analysis generated by CTIWatch. CVE data is provided under the NVD usage policy.
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