{
  "schemaVersion": 1,
  "attribution": [
    {
      "source": "CISA Known Exploited Vulnerabilities",
      "url": "https://www.cisa.gov/known-exploited-vulnerabilities-catalog",
      "licence": "US government work"
    },
    {
      "source": "GitHub Advisory Database",
      "url": "https://github.com/advisories",
      "licence": "CC BY 4.0"
    },
    {
      "source": "Have I Been Pwned",
      "url": "https://haveibeenpwned.com/",
      "licence": "CC BY 4.0"
    },
    {
      "source": "CVE Program (CVE records)",
      "url": "https://www.cve.org/Legal/TermsOfUse",
      "licence": "CVE Terms of Use",
      "notice": "Copyright © 1999-2026, The MITRE Corporation. CVE is a trademark and the CVE logo is a registered trademark of The MITRE Corporation.",
      "terms": "CVE Usage: MITRE hereby grants you a perpetual, worldwide, non-exclusive, no-charge, royalty-free, irrevocable copyright license to reproduce, prepare derivative works of, publicly display, publicly perform, sublicense, and distribute Common Vulnerabilities and Exposures (CVE™). Any copy you make for such purposes is authorized provided that you reproduce MITRE's copyright designation and this license in any such copy."
    },
    {
      "source": "FIRST EPSS",
      "url": "https://www.first.org/epss/",
      "licence": "free to use; FIRST requests attribution"
    }
  ],
  "record": {
    "id": "CVE-2026-64086",
    "sourceURL": "https://www.cve.org/CVERecord?id=CVE-2026-64086",
    "idYear": 2026,
    "status": "PUBLISHED",
    "publishedAt": "2026-07-19T15:39:56.749Z",
    "updatedAt": "2026-08-05T12:39:03.986Z",
    "importedAt": "2026-10-24T01:58:25.636Z",
    "snapshot": {
      "id": "cve_2026-10-24_midnight_baseline",
      "at": "2026-10-24T00:00:00.000Z",
      "source": "https://github.com/CVEProject/cvelistV5/releases/tag/cve_2026-10-24_0100Z"
    },
    "facts": {
      "title": "hwmon: (pmbus/adm1266) include PEC byte in pmbus_block_xfer read buffer",
      "summary": "In the Linux kernel, the following vulnerability has been resolved:\n\nhwmon: (pmbus/adm1266) include PEC byte in pmbus_block_xfer read buffer\n\nadm1266_pmbus_block_xfer() sets up the read transaction with\n\n\t.buf = data->read_buf,\n\t.len = ADM1266_PMBUS_BLOCK_MAX + 2,\n\nbut read_buf in struct adm1266_data is declared as\n\n\tu8 read_buf[ADM1266_PMBUS_BLOCK_MAX + 1];\n\nFor a max-length block response (length byte = 255 + up to 1 PEC\nbyte), the i2c controller is told to write 257 bytes into a 256-byte\nbuffer, putting one byte past the end of read_buf.  The same response\nalso makes the subsequent PEC compare\n\n\tif (crc != msgs[1].buf[msgs[1].buf[0] + 1])\n\nread a byte beyond the array.\n\nBump the read_buf declaration to ADM1266_PMBUS_BLOCK_MAX + 2 so the\nbuffer can hold the length byte, up to 255 payload bytes, and the PEC\nbyte the i2c_msg length already accounts for.",
      "affected": [
        {
          "vendor": "Linux",
          "product": "Linux",
          "defaultStatus": "unaffected",
          "versions": [
            {
              "version": "407dc802a9c0809ca6a48de4b4c63305eb84ef56",
              "status": "affected",
              "versionType": "git",
              "lessThan": "397d3f523bfff2f4e3dacf9b1339bd76dc207f78"
            },
            {
              "version": "407dc802a9c0809ca6a48de4b4c63305eb84ef56",
              "status": "affected",
              "versionType": "git",
              "lessThan": "472744f69d25a2d5111ad62f1d62579dce2c13c8"
            },
            {
              "version": "407dc802a9c0809ca6a48de4b4c63305eb84ef56",
              "status": "affected",
              "versionType": "git",
              "lessThan": "528a9f88e88502d0c2f2052a279415074cd83715"
            },
            {
              "version": "407dc802a9c0809ca6a48de4b4c63305eb84ef56",
              "status": "affected",
              "versionType": "git",
              "lessThan": "d94ceb16e55b6d8019ab069e357c76ac42f0ffbc"
            },
            {
              "version": "407dc802a9c0809ca6a48de4b4c63305eb84ef56",
              "status": "affected",
              "versionType": "git",
              "lessThan": "bd5be3fa5de6dbf61f1b3cec6b79c2c2f8065694"
            },
            {
              "version": "407dc802a9c0809ca6a48de4b4c63305eb84ef56",
              "status": "affected",
              "versionType": "git",
              "lessThan": "2279c342d94eca225bf9f301c8806a05a1c81619"
            },
            {
              "version": "407dc802a9c0809ca6a48de4b4c63305eb84ef56",
              "status": "affected",
              "versionType": "git",
              "lessThan": "a6c802145a8de0830bca803c6d415f7e9e683624"
            },
            {
              "version": "407dc802a9c0809ca6a48de4b4c63305eb84ef56",
              "status": "affected",
              "versionType": "git",
              "lessThan": "487566cb1ccdf3756fdd7bf8d875e612ff3169bb"
            }
          ]
        },
        {
          "vendor": "Linux",
          "product": "Linux",
          "defaultStatus": "affected",
          "versions": [
            {
              "version": "5.10",
              "status": "affected"
            },
            {
              "version": "0",
              "status": "unaffected",
              "versionType": "semver",
              "lessThan": "5.10"
            },
            {
              "version": "5.10.258",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "5.10.*"
            },
            {
              "version": "5.15.209",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "5.15.*"
            },
            {
              "version": "6.1.175",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "6.1.*"
            },
            {
              "version": "6.6.142",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "6.6.*"
            },
            {
              "version": "6.12.92",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "6.12.*"
            },
            {
              "version": "6.18.34",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "6.18.*"
            },
            {
              "version": "7.0.11",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "7.0.*"
            },
            {
              "version": "7.1",
              "status": "unaffected",
              "versionType": "original_commit_for_fix",
              "lessThanOrEqual": "*"
            }
          ]
        }
      ]
    }
  }
}