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RHEL 9 : systemd (RHSA-2026:13677)

medium Nessus Plugin ID 312185

Synopsis

The remote Red Hat host is missing a security update for systemd.

Description

The remote Redhat Enterprise Linux 9 host has packages installed that are affected by a vulnerability as referenced in the RHSA-2026:13677 advisory.

 The systemd packages contain systemd, a system and service manager for Linux, compatible with the SysV and LSB init scripts. It provides aggressive parallelism capabilities, uses socket and D-Bus activation for starting services, offers on-demand starting of daemons, and keeps track of processes using Linux cgroups.
 In addition, it supports snapshotting and restoring of the system state, maintains mount and automount points, and implements an elaborate transactional dependency-based service control logic. It can also work as a drop-in replacement for sysvinit.

 Security Fix(es):

 * systemd: systemd: Arbitrary code execution or Denial of Service via spurious IPC API call data (CVE-2026-29111)

 For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.

Tenable has extracted the preceding description block directly from the Red Hat Enterprise Linux security advisory.

Note that Nessus has not tested for this issue but has instead relied only on the application's self-reported version number.

Solution

Update the RHEL systemd package based on the guidance in RHSA-2026:13677.

See Also

https://access.redhat.com/security/updates/classification/#moderate

https://bugzilla.redhat.com/show_bug.cgi?id=2450505

http://www.nessus.org/u?45a239b6

https://access.redhat.com/errata/RHSA-2026:13677

Plugin Details

Severity: Medium

ID: 312185

File Name: redhat-RHSA-2026-13677.nasl

Version: 1.1

Type: Local

Agent: unix

Published: 5/5/2026

Updated: 5/5/2026

Supported Sensors: Agentless Assessment, Continuous Assessment, Frictionless Assessment Agent, Frictionless Assessment AWS, Frictionless Assessment Azure, Nessus Agent, Nessus

Risk Information

VPR

Risk Factor: Medium

Score: 4.4

Vendor

Vendor Severity: Moderate

CVSS v2

Risk Factor: Medium

Base Score: 6.8

Temporal Score: 5

Vector: CVSS2#AV:L/AC:L/Au:S/C:C/I:C/A:C

CVSS Score Source: CVE-2026-29111

CVSS v3

Risk Factor: Medium

Base Score: 5.5

Temporal Score: 4.8

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

Temporal Vector: CVSS:3.0/E:U/RL:O/RC:C

Vulnerability Information

CPE: p-cpe:/a:redhat:enterprise_linux:systemd-ukify, p-cpe:/a:redhat:enterprise_linux:systemd-journal-remote, p-cpe:/a:redhat:enterprise_linux:systemd-pam, p-cpe:/a:redhat:enterprise_linux:systemd, p-cpe:/a:redhat:enterprise_linux:systemd-rpm-macros, cpe:/o:redhat:enterprise_linux:9, p-cpe:/a:redhat:enterprise_linux:systemd-libs, p-cpe:/a:redhat:enterprise_linux:rhel-net-naming-sysattrs, p-cpe:/a:redhat:enterprise_linux:systemd-devel, p-cpe:/a:redhat:enterprise_linux:systemd-boot-unsigned, p-cpe:/a:redhat:enterprise_linux:systemd-oomd, p-cpe:/a:redhat:enterprise_linux:systemd-udev, p-cpe:/a:redhat:enterprise_linux:systemd-resolved, p-cpe:/a:redhat:enterprise_linux:systemd-container

Required KB Items: Host/local_checks_enabled, Host/RedHat/release, Host/RedHat/rpm-list, Host/cpu

Exploit Ease: No known exploits are available

Patch Publication Date: 5/5/2026

Vulnerability Publication Date: 3/23/2026

Reference Information

CVE: CVE-2026-29111

CWE: 1287

RHSA: 2026:13677