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CVE-2024-26926 Siemens CVE debrief

CVE-2024-26926 is a Linux kernel vulnerability in the Android Binder driver, specifically within the `binder_get_object()` function. The issue stems from a regression introduced in commit `6d98eb95b450` (binder: avoid potential data leakage when copying txn), which unintentionally removed an offset alignment check when replacing `binder_alloc_copy_from_buffer()` calls with `copy_from_user()`. Without this alignment verification, malformed binder transactions could trigger complications during object unwinding. The vulnerability was resolved by reintroducing an explicit offset alignment check in `binder_get_object()`. This check had previously existed but was removed in commit `7a67a39320df` due to perceived redundancy. The fix restores this defensive validation to prevent potential memory safety issues in the Binder IPC mechanism.

Vendor
Siemens
Product
RUGGEDCOM RST2428P (6GK6242-6PA00)
CVSS
NONE
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 industrial networking equipment with SINEC OS, particularly SCALANCE and RUGGEDCOM product families. System administrators managing Linux-based embedded systems in industrial control environments. Security teams responsible for OT/ICS infrastructure patch management. Android device manufacturers and custom ROM maintainers using affected kernel versions.

Technical summary

This vulnerability exists in the Linux kernel's Binder Inter-Process Communication (IPC) driver. The `binder_get_object()` function lacked an explicit offset alignment check after a code refactoring in commit `6d98eb95b450` replaced `binder_alloc_copy_from_buffer()` calls with direct `copy_from_user()` usage. The missing alignment verification could lead to complications when unwinding binder objects, potentially affecting memory safety. The fix reintroduces the alignment check that was previously present but removed in commit `7a67a39320df`. Affected industrial products include Siemens SINEC OS, SCALANCE XC-300/XR-300/XC-400/XR-500WG/XR-500 family, SCALANCE XCM-/XRM-/XCH-/XRH-300 family, and RUGGEDCOM RST2428P. Siemens has rated this vulnerability with a CVSS 3.1 score of 0.0 (AV:N/AC:H/PR:N/UI:R/S:U/C:N/I:N/A:N), indicating negligible direct impact, though the underlying kernel issue represents a defense-in-depth improvement.

Defensive priority

medium

Recommended defensive actions

  • Apply vendor-provided updates to V3.1 or later for affected Siemens SINEC OS and SCALANCE/RUGGEDCOM products per Siemens ProductCERT advisory SSA-613116
  • Review Linux kernel Binder subsystem configurations on affected embedded systems
  • Monitor for kernel updates from device vendors that incorporate the upstream Binder fix
  • Implement network segmentation for industrial control systems running affected firmware versions
  • Follow CISA ICS recommended practices for defense-in-depth strategies

Evidence notes

The vulnerability description indicates this is a regression fix in the Linux kernel's Binder driver. The fix was committed to address an alignment check that was inadvertently removed during a prior security hardening effort (commit 6d98eb95b450). The explicit alignment check in `binder_get_object()` prevents complications during object unwinding that could arise from unaligned offsets. Siemens ProductCERT has assessed this vulnerability as affecting SINEC OS and related industrial network infrastructure products, with a vendor fix available in V3.1 or later.

Official resources

2025-08-12