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CVE-2026-23307

Full vulnerability record from the local CVENow database.

Description

In the Linux kernel, the following vulnerability has been resolved: can: ems_usb: ems_usb_read_bulk_callback(): check the proper length of a message When looking at the data in a USB urb, the actual_length is the size of the buffer passed to the driver, not the transfer_buffer_length which is set by the driver as the max size of the buffer. When parsing the messages in ems_usb_read_bulk_callback() properly check the size both at the beginning of parsing the message to make sure it is big enough for the expected structure, and at the end of the message to make sure we don't overflow past the end of the buffer for the next message.

Severity
MEDIUM
CVSS score
5.5 (v3.1)
Vulnerability status
Analyzed
Source identifier
416baaa9-dc9f-4396-8d5f-8c081fb06d67
Published
2026-03-25 11:16:26.657000
Last modified
2026-11-05 22:18:13.810000
View original CVE JSON 
{
  "id": "CVE-2026-23307",
  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
  "published": "2026-03-25T11:16:26.657",
  "lastModified": "2026-11-05T22:18:13.810",
  "vulnStatus": "Analyzed",
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "In the Linux kernel, the following vulnerability has been resolved:\n\ncan: ems_usb: ems_usb_read_bulk_callback(): check the proper length of a message\n\nWhen looking at the data in a USB urb, the actual_length is the size of\nthe buffer passed to the driver, not the transfer_buffer_length which is\nset by the driver as the max size of the buffer.\n\nWhen parsing the messages in ems_usb_read_bulk_callback() properly check\nthe size both at the beginning of parsing the message to make sure it is\nbig enough for the expected structure, and at the end of the message to\nmake sure we don't overflow past the end of the buffer for the next\nmessage."
    },
    {
      "lang": "es",
      "value": "En el kernel de Linux, la siguiente vulnerabilidad ha sido resuelta:\n\ncan: ems_usb: ems_usb_read_bulk_callback(): comprobar la longitud adecuada de un mensaje\n\nAl examinar los datos en un urb USB, la actual_length es el tamaño del búfer pasado al controlador, no la transfer_buffer_length que es establecida por el controlador como el tamaño máximo del búfer.\n\nAl analizar los mensajes en ems_usb_read_bulk_callback(), comprobar correctamente el tamaño tanto al principio del análisis del mensaje para asegurarse de que sea lo suficientemente grande para la estructura esperada, como al final del mensaje para asegurarse de que no desbordemos más allá del final del búfer para el siguiente mensaje."
    }
  ],
  "affected": [
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      "affectedData": [
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          "product": "Linux",
          "defaultStatus": "unaffected",
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          "programFiles": [
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          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "versions": [
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              "version": "2.6.32",
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              "versionType": "original_commit_for_fix",
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        }
      ]
    }
  ],
  "metrics": {
    "cvssMetricV31": [
      {
        "source": "[email protected]",
        "type": "Primary",
        "cvssData": {
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          "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",
          "baseScore": 5.5,
          "baseSeverity": "MEDIUM",
          "attackVector": "LOCAL",
          "attackComplexity": "LOW",
          "privilegesRequired": "LOW",
          "userInteraction": "NONE",
          "scope": "UNCHANGED",
          "confidentialityImpact": "NONE",
          "integrityImpact": "NONE",
          "availabilityImpact": "HIGH"
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        "exploitabilityScore": 1.8,
        "impactScore": 3.6
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    "ssvcV203": [
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          "role": "CISA Coordinator",
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  "weaknesses": [
    {
      "source": "[email protected]",
      "type": "Primary",
      "description": [
        {
          "lang": "en",
          "value": "NVD-CWE-noinfo"
        }
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  "configurations": [
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}