PatchSiren cyber security CVE debrief

CVE-2023-52875 Siemens CVE debrief

A vulnerability in the Linux kernel's Mediatek clock driver (clk-mt2701) was resolved by adding a null-check for mtk_alloc_clk_data. The issue was a missing validation that could lead to undefined behavior if memory allocation failed. Siemens has assessed this CVE as **Misinformed** for their affected industrial networking products (RUGGEDCOM RST2428P, SCALANCE XC-300/XR-300/XC-400/XR-500WG/XR-500 family, and SCALANCE XCM-/XRM-/XCH-/XRH-300 family), indicating the vulnerability does not actually affect these products as initially reported. The CVE was published on 2025-08-12 and last modified on 2026-02-25. No CVSS score is available. This is not a Known Exploited Vulnerability (KEV).

Vendor: Siemens
Product: RUGGEDCOM RST2428P (6GK6242-6PA00)
CVSS: Unknown
CISA KEV: Not listed in stored evidence
Original CVE published: 2025-08-12
Original CVE updated: 2026-02-25
Advisory published: 2025-08-12
Advisory updated: 2026-02-25

Who should care

Organizations running Siemens RUGGEDCOM and SCALANCE industrial networking equipment; Linux kernel maintainers for Mediatek SoC support; OT security teams monitoring CISA ICS advisories

Technical summary

The vulnerability exists in the Mediatek clock driver for MT2701 SoCs in the Linux kernel. The fix adds a null-check for the return value of mtk_alloc_clk_data(), which allocates memory for clock data structures. Without this check, a failed memory allocation could result in null pointer dereference. The vulnerability is classified as CWE-476 (NULL Pointer Dereference). Siemens has determined this CVE does not actually affect their listed products despite initial inclusion in affected product lists.

Defensive priority

low

Recommended defensive actions

Verify current firmware version on affected Siemens devices
Review Siemens ProductCERT advisory SSA-613116 for product-specific guidance
Apply vendor-recommended updates if applicable
Monitor CISA ICS advisories for future updates

Evidence notes

The source CSAF document (ICSA-25-226-15) explicitly marks this CVE with threat category 'impact' and details 'Misinformed' for all affected product IDs (CSAFPID-0001, CSAFPID-0003, CSAFPID-0004). The CVE description indicates a kernel-level fix was implemented. No CVSS vector is provided in the source.

Official resources

The vulnerability was resolved in the Linux kernel by adding a check for mtk_alloc_clk_data. Siemens ProductCERT published advisory SSA-613116, subsequently republished by CISA as ICSA-25-226-15. The CISA advisory was updated on 2026-02-25,