systemd-homed contains a local privilege escalation bug via arbitrary system group addition to a local, logged in, homed-managed user

The remote Ubuntu 22.04 LTS / 24.04 LTS / 26.04 LTS host has packages installed that are affected by multiple vulnerabilities as referenced in the USN-8626-1 advisory.

    It was discovered that systemd-homed did not properly verify the signature of home records. A local     attacker could possibly use this issue to add arbitrary system groups to a logged-in user and gain     elevated privileges. (CVE-2026-16742)

    It was discovered that systemd-machined incorrectly handled certain polkit authorization checks. A local     attacker could possibly use this issue to terminate arbitrary processes, including privileged ones. This     issue only affected Ubuntu 26.04 LTS. (CVE-2026-15060)

    It was discovered that systemd-oomd did not properly validate certain IPC requests. A local attacker could     possibly use this issue to terminate arbitrary processes. (CVE-2026-15059)

Tenable has extracted the preceding description block directly from the Ubuntu security advisory.

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

There are packages installed that are affected by a vulnerability referenced in the following CVE:

  - systemd-homed contains a local privilege escalation bug via arbitrary system group addition to a local,
    logged in, homed-managed user (CVE-2026-16742)

It is, therefore, affected by a vulnerability as referenced in the ALAS2023-2026-3117 advisory.

    systemd-homed contains a local privilege escalation bug via arbitrary system group addition to a local,     logged in, homed-managed user (CVE-2026-16742)

Tenable has extracted the preceding description block directly from the tested product security advisory.

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

The remote openSUSE 16 host has packages installed that are affected by multiple vulnerabilities as referenced in the openSUSE-SU-2026:21754-1 advisory.

    This update for systemd fixes the following issue:

    Security issue fixed:

    - CVE-2026-16742: `systemd-homed`: local privilege escalation due to missing home record signature     verification on       the authentication path (bsc#1271444).

    Non security issue fixed:

    - `systemd-resolved` fails to start due to write access to `tmpfs` denied (bsc#1237515).

Tenable has extracted the preceding description block directly from the SUSE security advisory.

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

The version of Tencent Linux installed on the remote TencentOS Server 4 host is prior to tested version. It is, therefore, affected by multiple vulnerabilities as referenced in the TSSA-2026:0870 advisory.

    Package updates are available for TencentOS Server 4 that fix the following vulnerabilities:

    CVE-2026-16742:
    systemd-homed contains a local privilege escalation bug via arbitrary system group addition to a local,     logged in, homed-managed user

    CVE-2026-15059:
    Local unprivileged users can terminate arbitrary local processes via a systemd-oomd IPC API due to a     missing path traversal validation.

Tenable has extracted the preceding description block directly from the Tencent Linux security advisory.

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

The Linux/Unix host has one or more packages installed that are impacted by a vulnerability without a vendor supplied patch available.

  - systemd-homed contains a local privilege escalation bug via arbitrary system group addition to a local,     logged in, homed-managed user (CVE-2026-16742)

Note that Nessus relies on the presence of the package as reported by the vendor.

ID	Name	Product	Family	Type	Severity
365443	Ubuntu 22.04 LTS / 24.04 LTS / 26.04 LTS : systemd vulnerabilities (USN-8626-1)	Nessus	Ubuntu Local Security Checks	Local	medium
457436	Echo: systemd: security update to 257.13-1~deb13u1+e2	Tenable Cloud Security	Echo Local Security Checks	Local	medium
457436	Echo: systemd: security update to 257.13-1~deb13u1+e2	Tenable Self-Hosted Container Security	Echo Local Security Checks	Local	medium
351085	Amazon Linux 2023 : systemd, systemd-boot-unsigned, systemd-container (ALAS2023-2026-3117)	Nessus	Amazon Linux Local Security Checks	Local	medium
343938	openSUSE 16: libsystemd0 / libudev1 / systemd / systemd-boot / systemd-container / etc (openSUSE-SU-2026:21754-1)	Nessus	SuSE Local Security Checks	Local	medium
342064	TencentOS Server 4: systemd (TSSA-2026:0870)	Nessus	Tencent Local Security Checks	Local	medium
336069	Linux Distros Unpatched Vulnerability : CVE-2026-16742	Nessus	Misc.	Local	medium

Detections

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CVE-2026-16742

medium

Tenable Plugins

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