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PatchSiren cyber security CVE debrief

CVE-2024-47723 Siemens CVE debrief

This CVE addresses an out-of-bounds access vulnerability in the JFS (Journaled File System) implementation within the Linux kernel. The vulnerability exists in the `dbNextAG()` and `diAlloc()` functions where insufficient bounds checking on allocation group (AG) values could lead to memory corruption when processing malformed or 'polluted' JFS images. Specifically, `dbNextAG()` lacked validation when `bmp->db_numag` exceeds or equals `MAXAG`, and `diAlloc()` failed to check when `agno` exceeds or equals `MAXAG`. The fix adds appropriate bounds checks in `dbMount()`, `dbNextAG()`, and `diAlloc()` to prevent these out-of-bounds conditions. Siemens has identified this vulnerability as affecting certain industrial networking products that incorporate the vulnerable Linux kernel components, though the specific impact assessment indicates 'Misinformed' status per the source advisory. The vulnerability was initially published on August 12, 2025, with subsequent advisory updates through February 25, 2026, to clarify affected product configurations and remove rejected CVEs from related advisories.

Vendor
Siemens
Product
RUGGEDCOM RST2428P (6GK6242-6PA00)
CVSS
HIGH 7.8
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

System administrators managing Siemens industrial networking equipment running SINEC OS or related firmware; security teams responsible for Linux kernel security in operational technology environments; incident responders investigating potential filesystem-level attacks against industrial systems; and vulnerability management programs tracking third-party component security in ICS products.

Technical summary

The JFS filesystem driver in the Linux kernel contained missing bounds validations in allocation group handling. The `dbNextAG()` function did not verify that `bmp->db_numag` remained below `MAXAG` when processing potentially corrupted filesystem images, and failed to validate that `agpref` did not exceed `bmp->db_numag`. Similarly, `diAlloc()` lacked verification that `agno` remained below `MAXAG`. These conditions could trigger out-of-bounds memory access. The resolution adds defensive bounds checks in `dbMount()` during filesystem initialization, and explicit range validations in both `dbNextAG()` and `diAlloc()` before array indexing operations.

Defensive priority

medium

Recommended defensive actions

  • Review Siemens ProductCERT advisory SSA-355557 for definitive product impact and patch availability
  • Verify kernel version on affected Siemens devices and apply vendor-provided firmware updates
  • For systems processing untrusted JFS images, implement input validation and sandboxing controls
  • Monitor CISA ICS advisories for additional guidance on industrial control system protections
  • Apply defense-in-depth strategies per CISA ICS recommended practices for network segmentation and access control

Evidence notes

The vulnerability description is derived from the Linux kernel commit message and CISA CSAF advisory ICSA-25-226-07. Siemens ProductCERT advisory SSA-355557 provides the authoritative product impact assessment. The 'Misinformed' impact categorization originates from the source advisory's threat statement. Timeline dates reflect CVE publication (2025-08-12) and CISA republication update (2026-02-25) per source metadata.

Sources and references

Verified primary and authoritative sources

  • CVE-2024-47723 CVE Program record

    Publisher, destination, and source semantics verified

    URL: https://www.cve.org/CVERecord?id=CVE-2024-47723

    CVE Program - Official CVE Program record with source-provided CVE metadata.

  • CVE-2024-47723 NVD vulnerability detail

    Publisher, destination, and source semantics verified

    URL: https://nvd.nist.gov/vuln/detail/CVE-2024-47723

    NIST National Vulnerability Database - Official NIST NVD detail page and source-specific vulnerability assessment.

Supplemental references

  • Source item URL

    Unverified legacy reference

    URL: https://raw.githubusercontent.com/cisagov/CSAF/develop/csaf_files/OT/white/2025/icsa-25-226-07.json

    cisa_csaf

  • Source reference

    Unverified legacy reference

    URL: https://cert-portal.siemens.com/productcert/csaf/ssa-355557.json

    Reference

  • Source reference

    Unverified legacy reference

    URL: https://cert-portal.siemens.com/productcert/html/ssa-355557.html

    Reference

  • Source reference

    Unverified legacy reference

    URL: https://www.cisa.gov/news-events/ics-advisories/icsa-25-226-07

    Reference

  • Source reference

    Unverified legacy reference

    URL: https://www.cisa.gov/news-events/ics-alerts/ics-alert-10-301-01

    Reference

  • Source reference

    Unverified legacy reference

    URL: https://www.cisa.gov/resources-tools/resources/ics-recommended-practices

    Reference

  • Source reference

    Unverified legacy reference

    URL: https://www.cisa.gov/topics/industrial-control-systems

    Reference

  • Source reference

    Unverified legacy reference

    URL: https://www.cisa.gov/sites/default/files/recommended_practices/NCCIC_ICS-CERT_Defense_in_Depth_2016_S508C.pdf

    Reference

Methodology and review provenance

AI-assisted synthesis based on stored public vulnerability evidence. System validation, approval state, and publication status do not by themselves establish human review of this revision. PatchSiren helps prioritize defensive review and does not prove exposure or remediation on any system.