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Fencer Intel
medium 5.5

CVE-2016-7795 json

The manager_invoke_notify_message function in systemd 231 and earlier allows local users to cause a denial of service (assertion failure an…

published 2016-10-13 10 y ago modified 2026-06-17 4 mo ago also EUVD-2016-8645

cvss
5.5
version 3.0, NVD
cisa kev
Not listed
not in CISA's catalog
epss
0.6%
EPSS 0.6% chance of exploitation in 30 days, percentile 50%
public exploits
0
none known

Summary

The manager_invoke_notify_message function in systemd 231 and earlier allows local users to cause a denial of service (assertion failure and PID 1 hang) via a zero-length message received over a notify socket.

Patch / fix

  • systemd Debian 14, Debian 13, Debian 12 231-9

debian advisories DEBIAN-CVE-2016-7795

  • systemd Ubuntu 16.04 LTS 229-4ubuntu10

ubuntu advisories UBUNTU-CVE-2016-7795

Ubuntu security data © Canonical Ltd., from https://github.com/canonical/ubuntu-security-notices via OSV; changed: normalised to fixed package versions per release. CC BY-SA 4.0

  • systemd RHEL 7 219-30.el7_3.3
  • libgudev1 RHEL 7 219-30.el7_3.3
  • systemd-libs RHEL 7 219-30.el7_3.3
  • systemd-sysv RHEL 7 219-30.el7_3.3
  • systemd-python RHEL 7 219-30.el7_3.3
  • systemd-networkd RHEL 7 219-30.el7_3.3
  • systemd-resolved RHEL 7 219-30.el7_3.3
  • systemd-journal-gateway RHEL 7 219-30.el7_3.3

red hat advisories RHSA-2016:2694RHSA-2016:2610

  • systemd Arch Linux 231-2

arch linux advisories AVG-38

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2016-7795 updated cvss 6.8

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

  • Red Hat Enterprise Linux Client (v. 7) systemd 219-30.el7_3.3, libgudev1 219-30.el7_3.3, systemd-libs 219-30.el7_3.3, systemd-sysv 219-30.el7_3.3, systemd-python 219-30.el7_3.3, systemd-networkd 219-30.el7_3.3, +2 more Red Hat Enterprise Linux Client Optional (v. 7) systemd 219-30.el7_3.3, libgudev1 219-30.el7_3.3, systemd-libs 219-30.el7_3.3, systemd-sysv 219-30.el7_3.3, systemd-python 219-30.el7_3.3, systemd-networkd 219-30.el7_3.3, +2 more Red Hat Enterprise Linux ComputeNode (v. 7) systemd 219-30.el7_3.3, libgudev1 219-30.el7_3.3, systemd-libs 219-30.el7_3.3, systemd-sysv 219-30.el7_3.3, systemd-python 219-30.el7_3.3, systemd-networkd 219-30.el7_3.3, +2 more
    fixed: vendor fix RHSA-2016:2610
  • Red Hat Enterprise Linux ComputeNode EUS (v. 7.2) systemd 219-19.el7_2.18, libgudev1 219-19.el7_2.18, systemd-libs 219-19.el7_2.18, systemd-sysv 219-19.el7_2.18, systemd-python 219-19.el7_2.18, systemd-networkd 219-19.el7_2.18, +2 more
    fixed: vendor fix RHSA-2016:2694
  • Red Hat Enterprise Linux ComputeNode Optional (v. 7) systemd 219-30.el7_3.3, libgudev1 219-30.el7_3.3, systemd-libs 219-30.el7_3.3, systemd-sysv 219-30.el7_3.3, systemd-python 219-30.el7_3.3, systemd-networkd 219-30.el7_3.3, +2 more
    fixed: vendor fix RHSA-2016:2610
  • Red Hat Enterprise Linux ComputeNode Optional EUS (v. 7.2) systemd 219-19.el7_2.18, libgudev1 219-19.el7_2.18, systemd-libs 219-19.el7_2.18, systemd-sysv 219-19.el7_2.18, systemd-python 219-19.el7_2.18, systemd-networkd 219-19.el7_2.18, +2 more
    fixed: vendor fix RHSA-2016:2694
  • Red Hat Enterprise Linux Server (v. 7) systemd 219-30.el7_3.3, libgudev1 219-30.el7_3.3, systemd-libs 219-30.el7_3.3, systemd-sysv 219-30.el7_3.3, systemd-python 219-30.el7_3.3, systemd-networkd 219-30.el7_3.3, +2 more
    fixed: vendor fix RHSA-2016:2610
  • Red Hat Enterprise Linux Server EUS (v. 7.2) systemd 219-19.el7_2.18, libgudev1 219-19.el7_2.18, systemd-libs 219-19.el7_2.18, systemd-sysv 219-19.el7_2.18, systemd-python 219-19.el7_2.18, systemd-networkd 219-19.el7_2.18, +2 more
    fixed: vendor fix RHSA-2016:2694
  • Red Hat Enterprise Linux Server Optional (v. 7) systemd 219-30.el7_3.3, libgudev1 219-30.el7_3.3, systemd-libs 219-30.el7_3.3, systemd-sysv 219-30.el7_3.3, systemd-python 219-30.el7_3.3, systemd-networkd 219-30.el7_3.3, +2 more
    fixed: vendor fix RHSA-2016:2610
  • Red Hat Enterprise Linux Server Optional EUS (v. 7.2) systemd 219-19.el7_2.18, libgudev1 219-19.el7_2.18, systemd-libs 219-19.el7_2.18, systemd-sysv 219-19.el7_2.18, systemd-python 219-19.el7_2.18, systemd-networkd 219-19.el7_2.18, +2 more
    fixed: vendor fix RHSA-2016:2694
show 1 more
  • Red Hat Enterprise Linux Workstation (v. 7) systemd 219-30.el7_3.3, libgudev1 219-30.el7_3.3, systemd-libs 219-30.el7_3.3, systemd-sysv 219-30.el7_3.3, systemd-python 219-30.el7_3.3, systemd-networkd 219-30.el7_3.3, +2 more Red Hat Enterprise Linux Workstation Optional (v. 7) systemd 219-30.el7_3.3, libgudev1 219-30.el7_3.3, systemd-libs 219-30.el7_3.3, systemd-sysv 219-30.el7_3.3, systemd-python 219-30.el7_3.3, systemd-networkd 219-30.el7_3.3, +2 more
    fixed: vendor fix RHSA-2016:2610

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

Exploit prediction

0.63% chance of exploitation in the next 30 days, higher than 50% of all scored CVEs (FIRST EPSS, 2026-11-09).

Exploits and checks

  • github.com https://github.com/systemd/systemd/issues/4234 referenced PoC, tagged "exploit" by a source, unverified
  • agwa.name https://www.agwa.name/blog/post/how_to_crash_systemd_in_one_tweet referenced PoC, tagged "exploit" by a source, unverified

CVSS scores

assigned by version score vector
NVD 3.0 5.5 CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
NVD 2.0 4.9 AV:L/AC:L/Au:N/C:N/I:N/A:C

Classification

Weakness
  • CWE-20 Improper Input Validation

References

Sources

Fencer Intel keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.