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PatchSiren cyber security CVE debrief

CVE-2024-57902 Siemens CVE debrief

A vulnerability in the Linux kernel's AF_PACKET subsystem allows local attackers to trigger a kernel crash (denial of service) when using the MSG_PEEK flag with VLAN-tagged packets. The flaw exists in vlan_get_tci() which incorrectly modifies socket buffer (skb) state during peek operations, causing skb_under_panic when multiple CPUs access the same skb. The vulnerability was discovered by syzbot and affects Siemens SIMATIC S7-1500 TM MFP industrial control systems running the GNU/Linux subsystem. No patch is currently available from the vendor; mitigations focus on restricting access to trusted personnel and trusted application sources.

Vendor
Siemens
Product
SIMATIC S7-1500 TM MFP - GNU/Linux subsystem
CVSS
HIGH 7.3
CISA KEV
Not listed in stored evidence
Original CVE published
2025-01-15
Original CVE updated
2026-08-04
Advisory published
2025-01-15
Advisory updated
2026-08-04

Who should care

System administrators of industrial control systems using Siemens SIMATIC S7-1500 TM MFP with GNU/Linux subsystem extensions; Linux kernel maintainers for embedded/ICS deployments; security teams monitoring OT/ICS environments for denial-of-service conditions

Technical summary

The vulnerability resides in the AF_PACKET socket implementation's vlan_get_tci() function, which failed to handle the MSG_PEEK case correctly. When MSG_PEEK is used to inspect VLAN-tagged packets without consuming them, the function attempts skb_push operations that can corrupt socket buffer state when accessed concurrently. This leads to skb_under_panic and kernel crash. The fix restructures vlan_get_tci() to be read-only with respect to skb data, enabling safe concurrent access. The issue affects Siemens SIMATIC S7-1500 TM MFP industrial controllers using the GNU/Linux subsystem for extended functionality.

Defensive priority

medium

Recommended defensive actions

  • Restrict interactive shell access to the GNU/Linux subsystem to trusted personnel only
  • Only build and run applications from trusted sources
  • Monitor for kernel panic events related to skb_under_panic in system logs
  • Apply vendor security updates when available for the SIMATIC S7-1500 TM MFP GNU/Linux subsystem
  • Consider network segmentation to limit exposure of affected industrial control systems

Evidence notes

The vulnerability was identified through automated fuzzing by syzbot, with a reproducible kernel panic trace showing skb_under_panic at net/core/skbuff.c:206. The crash occurs in vlan_get_tci() at net/packet/af_packet.c:565 when skb_push operations fail due to buffer underflow during MSG_PEEK processing. The fix involves reworking vlan_get_tci() to not modify skb state and adding const qualifier for thread safety.

Sources and references

Verified primary and authoritative sources

  • CVE-2024-57902 CVE Program record

    Publisher, destination, and source semantics verified

    URL: https://www.cve.org/CVERecord?id=CVE-2024-57902

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

  • CVE-2024-57902 NVD vulnerability detail

    Publisher, destination, and source semantics verified

    URL: https://nvd.nist.gov/vuln/detail/CVE-2024-57902

    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/2024/icsa-24-102-01.json

    cisa_csaf

  • Source reference

    Unverified legacy reference

    URL: https://cert-portal.siemens.com/productcert/csaf/ssa-265688.json

    Reference

  • Source reference

    Unverified legacy reference

    URL: https://cert-portal.siemens.com/productcert/html/ssa-265688.html

    Reference

  • Source reference

    Unverified legacy reference

    URL: https://www.cisa.gov/news-events/ics-advisories/icsa-24-102-01

    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.