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8 vulnerabilities found for by RT-Labs AB

CVE-2026-82947 (GCVE-0-2026-82947)
Vulnerability from cvelistv5
Published
2026-10-26 08:59
Modified
2026-11-02 20:59
Severity ?
7.1 (High) - CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:L
CWE
  • CWE-125 - Out-of-bounds read
  • CWE-787 - Out-of-bounds write
  • CWE-191 - Integer underflow (wrap or wraparound)
  • CWE-129 - Improper validation of array index
Summary
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.
References
Impacted products
Vendor Product Version
RT-Labs AB SOEM Version: 0   ≤
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CVE-2026-82946 (GCVE-0-2026-82946)
Vulnerability from cvelistv5
Published
2026-10-26 08:55
Modified
2026-10-26 14:35
Severity ?
6.5 (Medium) - CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
CWE
  • CWE-476 - NULL pointer dereference
  • CWE-690 - Unchecked Return Value to NULL Pointer Dereference
Summary
SOEM version 2.0.0 and earlier contains a vulnerability where a malicious device can crash the master system. When the software receives an error response, it clears an internal pointer but continues processing. If another message arrives before timeout, the software attempts to use the cleared pointer, causing a crash. An attacker can trigger this with a simple sequence of two messages.
References
Impacted products
Vendor Product Version
RT-Labs AB SOEM Version: 0   ≤
Create a notification for this product.
Show details on NVD website

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CVE-2026-82945 (GCVE-0-2026-82945)
Vulnerability from cvelistv5
Published
2026-10-26 08:51
Modified
2026-10-26 14:35
Severity ?
6.5 (Medium) - CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
CWE
  • CWE-787 - Out-of-bounds write
  • CWE-129 - Improper validation of array index
  • CWE-120 - Buffer Copy without Checking Size of Input (‘Classic Buffer Overflow’)
Summary
SOEM version 2.0.0 and earlier contains a vulnerability during device configuration where a malicious device can cause memory corruption. The software writes configuration data to a fixed-size array without checking if the array index exceeds its maximum size of EC_MAXFMMU entries. A device presenting more than EC_MAXFMMU configuration blocks can force writes beyond the array boundary, corrupting adjacent memory structures and potentially disrupting subsequent operations.
References
Impacted products
Vendor Product Version
RT-Labs AB SOEM Version: 0   ≤
Create a notification for this product.
Show details on NVD website

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CVE-2026-82944 (GCVE-0-2026-82944)
Vulnerability from cvelistv5
Published
2026-10-26 08:47
Modified
2026-11-02 20:58
Severity ?
8.8 (High) - CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
CWE
  • CWE-787 - Out-of-bounds write
  • CWE-131 - Incorrect calculation of buffer size
  • CWE-120 - Buffer Copy without Checking Size of Input (‘Classic Buffer Overflow’)
Summary
SOEM version 2.0.0 and earlier contains a vulnerability in multi-segment data transfers where a malicious device can overflow memory buffers. The software checks the total size only once at the beginning, but doesn't track the cumulative size as multiple segments arrive. An attacker can declare a small initial size to pass validation, then send additional segments that exceed the allocated buffer. This allows the attacker to write controlled data beyond buffer boundaries, potentially enabling code execution.
References
Impacted products
Vendor Product Version
RT-Labs AB SOEM Version: 0   ≤
Create a notification for this product.
Show details on NVD website

To clipboard 

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CVE-2026-82943 (GCVE-0-2026-82943)
Vulnerability from cvelistv5
Published
2026-10-26 08:41
Modified
2026-10-26 14:35
Severity ?
6.5 (Medium) - CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
CWE
  • CWE-125 - Out-of-bounds read
  • CWE-195 - Signed to unsigned conversion error
  • CWE-200 - Exposure of Sensitive Information to an Unauthorized Actor
Summary
SOEM version 2.0.0 and earlier contains vulnerabilities where a malicious device can send messages that cause the master to read data from memory locations beyond the intended buffer. The software uses length values from device responses without validating them against actual buffer sizes. An attacker can exploit this to extract up to 64KB of data from the master's memory.
References
Impacted products
Vendor Product Version
RT-Labs AB SOEM Version: 0   ≤
Create a notification for this product.
Show details on NVD website

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CVE-2026-70388 (GCVE-0-2026-70388)
Vulnerability from cvelistv5
Published
2026-10-26 08:34
Modified
2026-11-02 18:14
Severity ?
8.3 (High) - CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:L/I:H/A:H
CWE
  • CWE-191 - Integer underflow (wrap or wraparound)
  • CWE-195 - Signed to unsigned conversion error
  • CWE-787 - Out-of-bounds write
Summary
SOEM version 2.0.0 and earlier contains vulnerabilities where a malicious device on the network can send specially crafted messages that cause the master to write data outside allocated memory boundaries. The software performs arithmetic on message length values without proper validation, allowing negative or extremely large values to bypass safety checks. This can corrupt memory and potentially allow an attacker to execute arbitrary code on the master system.
References
Impacted products
Vendor Product Version
RT-Labs AB SOEM Version: 0   ≤
Create a notification for this product.
Show details on NVD website

To clipboard 

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CVE-2026-82358 (GCVE-0-2026-82358)
Vulnerability from cvelistv5
Published
2026-10-01 19:42
Modified
2026-10-07 15:52
Severity ?
6.5 (Medium) - CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N
7.1 (High) - CVSS:4.0/AV:A/AC:L/AT:N/PR:N/UI:N/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N
CWE
  • CWE-863 - Incorrect Authorization
Summary
RT-Labs AB C-Open CANopen contains a write protection bypass in the SDO (Service Data Object) server implementation 'src/co_sdo_server.c' that fails to properly validate write permissions when processing download-segment frames. An unauthenticated attacker on the CAN bus can initiate an SDO upload for a read-only Object Dictionary (OD) entry, which sets a data pointer to the read-only object, then send download-segment frames to write to that memory location. The download-segment handler does not verify that a download session is active, allowing any CANopen node to overwrite read-only OD entries using two SDO frames. Note that CANopen protocol operates over CAN bus and does not provide built-in authentication mechanisms. Fixed in 1.1.1.
References
Impacted products
Vendor Product Version
RT-Labs AB C-Open Version: 0   < 1.1.1
 Create a notification for this product.
Show details on NVD website

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CVE-2026-82357 (GCVE-0-2026-82357)
Vulnerability from cvelistv5
Published
2026-10-01 19:41
Modified
2026-10-07 15:52
Severity ?
6.5 (Medium) - CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
7.1 (High) - CVSS:4.0/AV:A/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N
CWE
  • CWE-476 - NULL Pointer Dereference
Summary
RT-Labs AB C-Open CANopen contains a NULL pointer dereference if the LSS protocol is used to configure the device. An object defined by the user application may not have all required subindexes for object 0x1018. An unauthenticated, remote attacker with access to the CAN bus, through a compromised node for instance, can initiate the LSS protocol on a device with a misconfigured identity object and potentially crash the device. Fixed in 1.1.1.
References
Impacted products
Vendor Product Version
RT-Labs AB C-Open Version: 0   < 1.1.1
 Create a notification for this product.
Show details on NVD website

To clipboard 

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        "orgId": "9119a7d8-5eab-497f-8521-727c672e3725",
        "shortName": "cisa-cg"
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      "references": [
        {
          "name": "url",
          "tags": [
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          "url": "https://rt-labs.com/wp-content/uploads/2026/09/RRTL-260929-01.pdf"
        },
        {
          "name": "url",
          "tags": [
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          "url": "https://github.com/rtlabs-com/c-open/releases/tag/public%2Fv1.1.1"
        },
        {
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          "url": "https://raw.githubusercontent.com/cisagov/CSAF/develop/csaf_files/IT/white/2025/va-26-275-02.json"
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          "tags": [
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          "url": "https://www.cve.org/CVERecord?id=CVE-2026-82357"
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      ],
      "title": "RT-Labs AB C-Open CANopen NULL pointer dereference"
    }
  },
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    "datePublished": "2026-10-01T19:41:47.996Z",
    "dateReserved": "2026-08-28T18:10:39.170Z",
    "dateUpdated": "2026-10-07T15:52:15.802Z",
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