CVE-2016-7796

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Summary

CVECVE-2016-7796
StatePUBLISHED
Assignermitre
Source PriorityCVE Program / NVD first with legacy fallback
Published2016-10-13 14:59:14 UTC
Updated2026-05-06 22:30:45 UTC
DescriptionThe manager_dispatch_notify_fd function in systemd allows local users to cause a denial of service (system hang) via a zero-length message received over a notify socket, which causes an error to be returned and the notification handler to be disabled.

Risk And Classification

Primary CVSS: v3.0 5.5 MEDIUM from [email protected]

CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

EPSS: 0.003850000 probability, percentile 0.597700000 (date 2026-05-07)

Problem Types: CWE-20 | n/a

VersionSourceTypeScoreSeverityVector
3.0[email protected]Primary5.5MEDIUMCVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
2.0[email protected]Primary4.9AV:L/AC:L/Au:N/C:N/I:N/A:C

CVSS v3.0 Breakdown

Attack Vector
Local
Attack Complexity
Low
Privileges Required
Low
User Interaction
None
Scope
Unchanged
Confidentiality
None
Integrity
None
Availability
High

CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

CVSS v2.0 Breakdown

Access Vector
Local
Access Complexity
Low
Authentication
None
Confidentiality
None
Integrity
None
Availability
Complete

AV:L/AC:L/Au:N/C:N/I:N/A:C

NVD Known Affected Configurations (CPE 2.3)

TypeVendorProductVersionUpdateEditionLanguage
Operating System Novell Suse Linux Enterprise Desktop 12 sp1 All All
Operating System Novell Suse Linux Enterprise Server 12.0 All All All
Operating System Novell Suse Linux Enterprise Server 12.0 sp1 All All
Operating System Novell Suse Linux Enterprise Server For Sap 12.0 All All All
Application Novell Suse Linux Enterprise Software Development Kit 12.0 sp1 All All
Operating System Redhat Enterprise Linux Desktop 7.0 All All All
Operating System Redhat Enterprise Linux Hpc Node 7.0 All All All
Operating System Redhat Enterprise Linux Server 7.0 All All All
Operating System Redhat Enterprise Linux Workstation 7.0 All All All
Application Systemd Project Systemd 209 All All All
Application Systemd Project Systemd 213 All All All
Application Systemd Project Systemd 214 All All All
Application Systemd Project Systemd 229 All All All

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Na N/a affected n/a Not specified

References

ReferenceSourceLinkTags
[security-announce] SUSE-SU-2016:2476-1: important: Security update for af854a3a-2127-422b-91ae-364da2661108 lists.opensuse.org Third Party Advisory
Bug 1381911 – CVE-2016-7796 systemd: freeze when PID 1 receives a zero-length message over notify socket af854a3a-2127-422b-91ae-364da2661108 bugzilla.redhat.com Issue Tracking, Third Party Advisory, VDB Entry
systemd Zero-Length Notification Processing Flaw Lets Local Users Cause Denial of Service Conditions - SecurityTracker af854a3a-2127-422b-91ae-364da2661108 www.securitytracker.com
Red Hat Customer Portal af854a3a-2127-422b-91ae-364da2661108 rhn.redhat.com
Assertion failure when PID 1 receives a zero-length message over notify socket · Issue #4234 · systemd/systemd · GitHub af854a3a-2127-422b-91ae-364da2661108 github.com Exploit, Patch, Vendor Advisory
How to Crash Systemd in One Tweet af854a3a-2127-422b-91ae-364da2661108 www.agwa.name Exploit, Technical Description, Third Party Advisory
Red Hat Customer Portal af854a3a-2127-422b-91ae-364da2661108 rhn.redhat.com Third Party Advisory
[security-announce] SUSE-SU-2016:2475-1: important: Security update for af854a3a-2127-422b-91ae-364da2661108 lists.opensuse.org Third Party Advisory
oss-security - Re: CVE Request: systemd v209+: local denial-of-service attack af854a3a-2127-422b-91ae-364da2661108 www.openwall.com Third Party Advisory
systemd CVE-2016-7796 Local Denial of Service Vulnerability af854a3a-2127-422b-91ae-364da2661108 www.securityfocus.com Third Party Advisory
CVE Program record CVE.ORG www.cve.org canonical
NVD vulnerability detail NVD nvd.nist.gov canonical, analysis
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