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CVE-2016-7795

16
FAUCET Score

CVE-2016-7795 describes a denial-of-service vulnerability in systemd versions 231 and earlier, affecting products like Canonical Ubuntu Linux. A local attacker can trigger an assertion failure and PID 1 hang by sending a zero-length message over a notify socket. Rated Medium (CVSS 5.5), this vulnerability requires local access but can lead to a complete system outage. There is no evidence of active exploitation, public exploit code, or significant community discussion surrounding this CVE.

Impacted Technologies

VendorProductVersion(s)CPE
16.04CPE matchmatch criteria
cpe:2.3:o:canonical:ubuntu_linux:16.04:*:*:*:lts:*:*:*
<= 231CPE matchmatch criteria
cpe:2.3:a:systemd_project:systemd:*:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.0

5.5MEDIUM

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

Attack Vector
LOCAL
Attack Complexity
LOW
Privileges Required
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
HIGH
Exploitability Score
1.8
Impact Score
3.6
CvssVersion
3.0

Exploit Intelligence

EPSS Score
0.63%
Probability of exploitation in next 30 days
EPSS Percentile
46.7%
Percentile rank of EPSS score among Peer Group
As of 2026-07-26
Model: v2026.06.15
This CVE's current EPSS score of 0.0063 is in the 94th percentile among its peer group of 15,938 CVEs.

Social Chatter

No social media mentions found for this CVE.

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.0 Bluesky, 0.0 Mastodon, and 0.1 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.1 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Patch Available

Vendor Patches (3)

github_advisorypatch availablevia nvd_reference
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 7Fixed in: systemd-0:219-30.el7_3.3
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 7.2 Extended Update SupportFixed in: systemd-0:219-19.el7_2.18
View patch

Vendor Advisories (1)

redhatCVE-2016-7795Moderate

systemd: Assertion failure when PID 1 receives a zero-length message over notify socket

Sep 28, 2016

References

rhn.redhat.com / errata/RHSA-2016-2610.html
rhn.redhat.com / errata/RHSA-2016-2694.html
github.com / systemd/systemd/issues/4234
ExploitPatchThird Party Advisory
agwa.name / blog/post/how_to_crash_systemd_in_one_tweet
ExploitTechnical DescriptionThird Party Advisory
openwall.com / lists/oss-security/2016/09/28/9
Third Party Advisory
openwall.com / lists/oss-security/2016/09/30/1
Third Party Advisory
securityfocus.com / bid/93223
Third Party AdvisoryVDB Entry
securitytracker.com / id/1037320
ubuntu.com / usn/USN-3094-1
Third Party Advisory