What’s Vulnerable › Vulnerabilities
CVE-2016-7796
- Severity: medium (CVSS 5.5 v3.0)
- Exploited in the wild: not listed in CISA KEV
- EPSS: 0.9% probability of exploitation in the next 30 days
- Public exploit or detection template: yes
- Published: 2016-10-13 · updated 2026-06-17
- Weakness: CWE-20
Description
The 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.
Affected products
- Novell Suse Linux Enterprise Desktop: 12-sp1
- Novell Suse Linux Enterprise Server: 12.0, 12.0-sp1
- Novell Suse Linux Enterprise Server For Sap: 12.0
- Novell Suse Linux Enterprise Software Development Kit: 12.0-sp1
- RedHat Enterprise Linux Desktop: 7.0
- RedHat Enterprise Linux Hpc Node: 7.0
- RedHat Enterprise Linux Server: 7.0
- RedHat Enterprise Linux Workstation: 7.0
- systemd: 209, 213, 214, 229
References
- http://lists.opensuse.org/opensuse-security-announce/2016-10/msg00015.html
- http://lists.opensuse.org/opensuse-security-announce/2016-10/msg00016.html
- http://rhn.redhat.com/errata/RHSA-2017-0003.html
- http://www.openwall.com/lists/oss-security/2016/09/30/1
- http://www.securityfocus.com/bid/93250
- http://www.securitytracker.com/id/1037320
- https://bugzilla.redhat.com/show_bug.cgi?id=1381911
- https://github.com/systemd/systemd/issues/4234#issuecomment-250441246
- https://rhn.redhat.com/errata/RHBA-2015-2092.html
- https://www.agwa.name/blog/post/how_to_crash_systemd_in_one_tweet
- http://lists.opensuse.org/opensuse-security-announce/2016-10/msg00015.html
- http://lists.opensuse.org/opensuse-security-announce/2016-10/msg00016.html
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