PatchSiren cyber security CVE debrief

CVE-2024-58058 Siemens CVE debrief

A NULL pointer dereference vulnerability in the UBIFS (Unsorted Block Image File System) implementation of the Linux kernel. The flaw occurs when the TNC (Tree Node Cache) tree dumping routine fails to validate that the zroot pointer is non-NULL before dereferencing it. This can lead to a kernel crash (denial of service) when triggered by a local attacker with low privileges. The vulnerability affects Siemens SIMATIC S7-1500 TM MFP industrial control systems that utilize the GNU/Linux subsystem.

Vendor: Siemens
Product: SIMATIC S7-1500 TM MFP - GNU/Linux subsystem
CVSS: MEDIUM 5.5
CISA KEV: Not listed in stored evidence
Original CVE published: 2024-04-09
Original CVE updated: 2026-05-14
Advisory published: 2024-04-09
Advisory updated: 2026-05-14

Who should care

Industrial control system operators, OT security teams, and Siemens SIMATIC S7-1500 TM MFP administrators should prioritize this vulnerability. Organizations in manufacturing, process control, and critical infrastructure sectors using this platform are at risk of denial-of-service conditions that could disrupt operational technology environments.

Technical summary

The vulnerability exists in the UBIFS file system implementation within the Linux kernel. Specifically, the TNC tree dumping functionality does not check whether the zroot pointer is NULL before attempting to use it. This NULL pointer dereference can be triggered during file system operations, resulting in a kernel oops or panic. The flaw is classified as CWE-476 (NULL Pointer Dereference). The affected product is the Siemens SIMATIC S7-1500 TM MFP with its GNU/Linux subsystem, commonly deployed in industrial automation environments. No patch is currently available per vendor advisory; mitigation relies on access controls and trusted application sourcing.

Defensive priority

medium

Recommended defensive actions

Restrict interactive shell access to the GNU/Linux subsystem to trusted personnel only
Build and run applications exclusively from trusted sources
Monitor for kernel crashes or unexpected reboots on affected systems
Apply vendor patches when Siemens releases firmware updates addressing this vulnerability
Implement network segmentation to limit access to industrial control system components

Evidence notes

CVE published 2024-04-09; CISA advisory ICSA-24-102-01 published same date. Advisory last modified 2026-05-14 with multiple revision updates through Additional Release 9 (2025-09-09). CVSS 3.1 vector AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H confirms local attack vector with low privileges required, no confidentiality or integrity impact, high availability impact.

Official resources

2024-04-09