i2c: rtl9300: Fix out-of-bounds bug in rtl9300_i2c_smbus_xfer

{
  "id": "c758efd6c008c08a4b07eb5bb5169f1706902140dc9c7ed9acfdd4a0d540f077",
  "url": "https://osv.dev/vulnerability/CVE-2025-39680",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "i2c: rtl9300: Fix out-of-bounds bug in rtl9300_i2c_smbus_xfer",
    "summary": "In the Linux kernel, the following vulnerability has been resolved: i2c: rtl9300: Fix out-of-bounds bug in rtl9300_i2c_smbus_xfer The data->block[0] variable comes from user. Without proper check, the variable may be very large to cause an out-of-bounds bug. Fix this bug by checking the value of data->block[0] first. 1. commit 39244cc75482 (\"i2c: ismt: Fix an out-of-bounds bug in ismt_access()\") 2. commit 92fbb6d1296f (\"i2c: xgene-slimpro: Fix out-of-bounds bug in xgene_slimpro_i2c_xfer()\")",
    "evidence": "osv:CVE-2025-39680",
    "products": [
      {
        "name": {
          "value": "Kernel",
          "evidence": "/affected/1/package/name"
        },
        "prerequisites": [],
        "fixed_versions": [
          {
            "value": "6.16.4",
            "evidence": "/affected/1/ranges"
          }
        ],
        "affected_versions": []
      }
    ],
    "severity": "high",
    "structured": {
      "id": "CVE-2025-39680",
      "aliases": [
        "CVE-2025-39680"
      ],
      "metrics": [
        {
          "type": "CVSS_V3",
          "score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H"
        }
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
              "type": "GIT",
              "events": [
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                  "introduced": "c366be720235301fdadf67e6f1ea6ff32669c074"
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                {
                  "fixed": "071e43fcba5ddd9a7813e6cc0aa10299eae41b21"
                },
                {
                  "fixed": "57f312b955938fc4663f430cb57a71f2414f601b"
                }
              ]
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          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2025-39680.json"
          }
        },
        {
          "ranges": [
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "6.13.0"
                },
                {
                  "fixed": "6.16.4"
                }
              ]
            }
          ],
          "package": {
            "name": "Kernel",
            "ecosystem": "Linux"
          },
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2025-39680.json"
          }
        }
      ],
      "modified": "2026-10-28T02:30:38.595909154Z",
      "provider": "osv",
      "references": [
        "https://git.kernel.org/stable/c/071e43fcba5ddd9a7813e6cc0aa10299eae41b21",
        "https://git.kernel.org/stable/c/57f312b955938fc4663f430cb57a71f2414f601b",
        "https://github.com/CVEProject/cvelistV5/tree/main/cves/2025/39xxx/CVE-2025-39680.json",
        "https://nvd.nist.gov/vuln/detail/CVE-2025-39680",
        "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"
      ],
      "provider_metadata": {
        "cna_assigner": "Linux",
        "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2025/39xxx/CVE-2025-39680.json"
      }
    },
    "related_cves": [
      {
        "value": "CVE-2025-39680",
        "evidence": "/id"
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    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 506255,
  "published_at": "2025-09-05T17:20:46.456+00:00"
}