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TI-2026-80300 Aliases CVE-2026-82947GHSA-fq96-jx7g-9639

Out-of-bounds reads in SOEM frame processing expose memory

Priority LOW 30CWE-125Published · Updated

Key facts

Attack vector
Adjacent network
Privileges required
None
User interaction
None
Attack complexity
Low
Impact type
—
Confidentiality · integrity · availability
High · None · Low
Fix status
Fixed

Attack profile from CVSS 3.1 · CNA. Fix status from CNA.

Summary

RT-Labs AB SOEM versions before 2.0.1 contain multiple out-of-bounds read flaws in frame processing (CWE-125). The software uses length and offset values from device messages without checking them against buffer sizes. A malicious device on an adjacent network can make the master read invalid memory, which can disclose sensitive information or crash the master.

Written with Claude Haiku 5.5 from the sources below · 2026-11-03

Description from the CNA

SOEM version 2.0.0 and earlier contains multiple vulnerabilities in frame processing where a malicious device can cause the master to read data outside allocated buffers. The software uses length and offset values from device messages without validating them against buffer sizes. This can cause the master to access invalid memory locations, potentially disclosing sensitive information or causing crashes.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.0017 6th percentileScored 2026-11-07
Fix Fixed SOEM (RT-Labs AB): 2.0.1

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
None
Automatable
No
Technical impact
Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
RT-LabsSOEMbefore 2.0.12.0.1Patch availableCNA
  • SOEM VendorRT-Labs Affected before 2.0.1 Fixed in 2.0.1 Patch available CNA

Remediation

Update RT-Labs AB SOEM to version 2.0.1, which is the fixed version.

Written with Claude Haiku 5.5 from the sources below · 2026-11-03

  • Fix · CNA SOEM (RT-Labs AB) Fixed in 2.0.1

Fixed in the same release

Records fixed by the same vendor advisory or release, as the CNA lists them.

  • Advisory ·

    RT-Labs SOEM — rt-labs.com/wp-content/uploads/2026/10/RRTL-260921-01.pdf

    6 records Highest priority Priority LOW 6 LOW

    Other records, highest priority first

    • TI-2026-80287 Buffer overflow in SOEM CoE SDO multi-segment data transfersPriority LOW 39
    • TI-2026-80282 SOEM Memory Corruption via Integer Underflow in Message Length ValidationPriority LOW 37
    • TI-2026-80289 NULL pointer dereference in SOEM mailbox error handlingPriority LOW 28
    Show all 6 records → Advisory →

Timeline

  1. 2026-10-26 Threatist record created from CVE-2026-82947
  2. 2026-10-26 Priority changed: MEDIUM → LOW
  3. 2026-10-27 Alias added: GHSA-fq96-jx7g-9639
  4. 2026-11-02 CISA SSVC decision points changed

References

Advisory 1

  • TI-2026-82626 Out-of-bounds write when parsing AR Vendor Block requests in RT-Labs P-Net CVSS 4.0CRITICAL 9.3
  • TI-2026-82632 Resource exhaustion from RPC sessions kept for unknown interface requests CVSS 4.0HIGH 8.7
  • TI-2026-82630 NULL pointer dereference in RT-Labs P-Net on implicit read requests CVSS 4.0HIGH 8.7
  • TI-2026-82627 NULL pointer dereference in P-Net lets remote attackers crash devices CVSS 4.0HIGH 8.7
  • TI-2026-82625 Infinite loop in RT-Labs P-Net PDPortDataCheck record handling CVSS 4.0HIGH 8.7
  • TI-2025-23482 Out-of-bounds write in RT-Labs P-Net CVSS 3.1CRITICAL 9.8
See all 28 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences