{
  "affected": [
    {
      "ranges": [
        {
          "events": [
            {
              "introduced": "1b2ca93cd0592b1fcbc6f8b64e02552bc15f4bb4"
            },
            {
              "fixed": "7eccabff1c9ec15e4b6fe186d5c147b13a9cdb4e"
            },
            {
              "fixed": "95d48e37a1304d6148406c799479c0fb505aefa7"
            },
            {
              "fixed": "a11aa9c5fd9dfe62be7cfec1f2a7546afb77254c"
            },
            {
              "fixed": "24c73e93d6a756e1b8626bb259d2e07c5b89b370"
            }
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "type": "GIT"
        }
      ]
    },
    {
      "package": {
        "ecosystem": "Linux",
        "name": "Kernel"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "6.9.0"
            },
            {
              "fixed": "6.12.86"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.13.0"
            },
            {
              "fixed": "6.18.27"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.19.0"
            },
            {
              "fixed": "7.0.4"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "database_specific": {
    "cna_assigner": "Linux",
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/46xxx/CVE-2026-46001.json"
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nhwmon: (pt5161l) Fix bugs in pt5161l_read_block_data()\n\nFix two bugs in pt5161l_read_block_data():\n\n1. Buffer overrun: The local buffer rbuf is declared as u8 rbuf[24],\n   but i2c_smbus_read_block_data() can return up to\n   I2C_SMBUS_BLOCK_MAX (32) bytes. The i2c-core copies the data into\n   the caller's buffer before the return value can be checked, so\n   the post-read length validation does not prevent a stack overrun\n   if a device returns more than 24 bytes. Resize the buffer to\n   I2C_SMBUS_BLOCK_MAX.\n\n2. Unexpected positive return on length mismatch: When all three\n   retries are exhausted because the device returns data with an\n   unexpected length, i2c_smbus_read_block_data() returns a positive\n   byte count. The function returns this directly, and callers treat\n   any non-negative return as success, processing stale or incomplete\n   buffer contents. Return -EIO when retries are exhausted with a\n   positive return value, preserving the negative error code on I2C\n   failure.",
  "id": "CVE-2026-46001",
  "modified": "2026-07-08T05:39:11.087850128Z",
  "published": "2026-05-27T12:55:56.128Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/24c73e93d6a756e1b8626bb259d2e07c5b89b370"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/7eccabff1c9ec15e4b6fe186d5c147b13a9cdb4e"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/95d48e37a1304d6148406c799479c0fb505aefa7"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/a11aa9c5fd9dfe62be7cfec1f2a7546afb77254c"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/46xxx/CVE-2026-46001.json"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-46001"
    },
    {
      "type": "PACKAGE",
      "url": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"
    }
  ],
  "schema_version": "1.7.5",
  "summary": "hwmon: (pt5161l) Fix bugs in pt5161l_read_block_data()"
}