Siemens SIMATIC S7-1500 Premature Release of Resource During Expected Lifetime (CVE-2025-31115)

high Tenable OT Security Plugin ID 503922

Synopsis

The remote OT asset is affected by a vulnerability.

Description

The threaded .xz decoder in liblzma has a vulnerability that can at least result in a crash (denial of service). The effects include heap use after free and writing to an address based on the null pointer plus an offset.

This plugin only works with Tenable.ot.
Please visit https://www.tenable.com/products/tenable-ot for more information.

Solution

Refer to the vendor advisory.

Plugin Details

Severity: High

ID: 503922

Version: 1.1

Type: remote

Family: Tenable.ot

Published: 11/13/2025

Updated: 11/13/2025

Supported Sensors: Tenable OT Security

Risk Information

VPR

Risk Factor: Medium

Score: 4.4

CVSS v3

Risk Factor: High

Base Score: 7.5

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

Vulnerability Information

CPE: cpe:/o:siemens:simatic_s7-1500_cpu_firmware:3.1.5, cpe:/o:siemens:siplus_s7-1500_cpu_firmware:3.1.5

Required KB Items: Tenable.ot/Siemens

Exploit Ease: No known exploits are available

Patch Publication Date: 6/10/2025

Vulnerability Publication Date: 6/10/2025

Reference Information

CVE: CVE-2025-31115

CWE: 826

ICSA: 23-348-10

Detections

Analytics