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Unity Linux 20.1070e Security Update: systemd (UTSA-2026-004962)
medium Nessus Plugin ID 296635
Synopsis
The Unity Linux host is missing one or more security updates.Description
The Unity Linux 20 host has a package installed that is affected by a vulnerability as referenced in the UTSA-2026-004962 advisory.A vulnerability was found in systemd-coredump. This flaw allows an attacker to force a SUID process to crash and replace it with a non-SUID binary to access the original's privileged process coredump, allowing the attacker to read sensitive data, such as /etc/shadow content, loaded by the original process.
A SUID binary or process has a special type of permission, which allows the process to run with the file owner's permissions, regardless of the user executing the binary. This allows the process to access more restricted data than unprivileged users or processes would be able to. An attacker can leverage this flaw by forcing a SUID process to crash and force the Linux kernel to recycle the process PID before systemd- coredump can analyze the /proc/pid/auxv file. If the attacker wins the race condition, they gain access to the original's SUID process coredump file. They can read sensitive content loaded into memory by the original binary, affecting data confidentiality.
Tenable has extracted the preceding description block directly from the Unity 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 affected systemd package.See Also
http://www.nessus.org/u?0ea5e27a
Plugin Details
Severity: Medium
ID: 296635
File Name: unity_linux_UTSA-2026-004962.nasl
Version: 1.1
Type: local
Published: 1/26/2026
Updated: 1/26/2026
Supported Sensors: Nessus
Risk Information
VPR
Risk Factor: Medium
Score: 5.1
CVSS v2
Risk Factor: Low
Base Score: 3.2
Temporal Score: 2.5
Vector: CVSS2#AV:L/AC:L/Au:S/C:P/I:N/A:P
CVSS Score Source: CVE-2025-4598
CVSS v3
Risk Factor: Medium
Base Score: 4.7
Temporal Score: 4.2
Vector: CVSS:3.0/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:N/A:N
Temporal Vector: CVSS:3.0/E:P/RL:O/RC:C
CVSS v4
Risk Factor: Medium
Base Score: 4.8
Threat Score: 1.9
Threat Vector: CVSS:4.0/E:P
Vector: CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:L/VI:N/VA:L/SC:N/SI:N/SA:N
Vulnerability Information
Required KB Items: Host/local_checks_enabled, Host/cpu, Host/UOS-Server/release, Host/UOS-Server/rpm-list
Exploit Available: true
Exploit Ease: Exploits are available
Patch Publication Date: 1/27/2026
Vulnerability Publication Date: 5/29/2025
Reference Information
CVE: CVE-2025-4598