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CVE-2025-38680

Full vulnerability record from the local CVENow database.

Description

In the Linux kernel, the following vulnerability has been resolved: media: uvcvideo: Fix 1-byte out-of-bounds read in uvc_parse_format() The buffer length check before calling uvc_parse_format() only ensured that the buffer has at least 3 bytes (buflen > 2), buf the function accesses buffer[3], requiring at least 4 bytes. This can lead to an out-of-bounds read if the buffer has exactly 3 bytes. Fix it by checking that the buffer has at least 4 bytes in uvc_parse_format().

Severity
HIGH
CVSS score
7.1 (v3.1)
Vulnerability status
Modified
Source identifier
416baaa9-dc9f-4396-8d5f-8c081fb06d67
Published
2025-09-04 16:15:35.553000
Last modified
2026-10-19 21:10:00.160000
View original CVE JSON 
{
  "id": "CVE-2025-38680",
  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
  "published": "2025-09-04T16:15:35.553",
  "lastModified": "2026-10-19T21:10:00.160",
  "vulnStatus": "Modified",
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nmedia: uvcvideo: Fix 1-byte out-of-bounds read in uvc_parse_format()\n\nThe buffer length check before calling uvc_parse_format() only ensured\nthat the buffer has at least 3 bytes (buflen > 2), buf the function\naccesses buffer[3], requiring at least 4 bytes.\n\nThis can lead to an out-of-bounds read if the buffer has exactly 3 bytes.\n\nFix it by checking that the buffer has at least 4 bytes in\nuvc_parse_format()."
    },
    {
      "lang": "es",
      "value": "En el kernel de Linux, la siguiente vulnerabilidad ha sido resuelta:\n\nmedia: uvcvideo: Corrección de lectura fuera de límites de 1 byte en uvc_parse_format()\n\nLa comprobación de la longitud del búfer antes de llamar a uvc_parse_format() solo aseguraba que el búfer tuviera al menos 3 bytes (buflen > 2), pero la función accede a buffer[3], requiriendo al menos 4 bytes.\n\nEsto puede llevar a una lectura fuera de límites si el búfer tiene exactamente 3 bytes.\n\nSe soluciona comprobando que el búfer tenga al menos 4 bytes en uvc_parse_format()."
    }
  ],
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      "affectedData": [
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          "vendor": "Siemens",
          "product": "SIMATIC CN 4100",
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          "baseSeverity": "HIGH",
          "attackVector": "LOCAL",
          "attackComplexity": "LOW",
          "privilegesRequired": "LOW",
          "userInteraction": "NONE",
          "scope": "UNCHANGED",
          "confidentialityImpact": "HIGH",
          "integrityImpact": "NONE",
          "availabilityImpact": "HIGH"
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        "exploitabilityScore": 1.8,
        "impactScore": 5.2
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  "weaknesses": [
    {
      "source": "[email protected]",
      "type": "Primary",
      "description": [
        {
          "lang": "en",
          "value": "CWE-125"
        }
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