{
  "cveId": "CVE-2026-64086",
  "url": "https://patchblox.com/security/cve/CVE-2026-64086",
  "summary": "CVE-2026-64086 is fixed in 16 products on 1 platform, first by DEBIAN-CVE-2026-64086, released July 20, 2026. It is not reported as exploited. Patch Radar priority: High.",
  "title": "linux: In the Linux kernel, the following vulnerability has been resolved:  hwmon: (pmbus/adm1266) include PEC byte in pmbus...",
  "description": "In the Linux kernel, the following vulnerability has been resolved:  hwmon: (pmbus/adm1266) include PEC byte in pmbus_block_xfer read buffer  adm1266_pmbus_block_xfer() sets up the read transaction with  \t.buf = data-\u003Eread_buf, \t.len = ADM1266_PMBUS_BLOCK_MAX \u002B 2,  but read_buf in struct adm1266_data is declared as  \tu8 read_buf[ADM1266_PMBUS_BLOCK_MAX \u002B 1];  For a max-length block response (length byte = 255 \u002B up to 1 PEC byte), the i2c controller is told to write 257 bytes into a 256-byte buffer, putting one byte past the end of read_buf.  The same response also makes the subsequent PEC compare  \tif (crc != msgs[1].buf[msgs[1].buf[0] \u002B 1])  read a byte beyond the array.  Bump the read_buf declaration to ADM1266_PMBUS_BLOCK_MAX \u002B 2 so the buffer can hold the length byte, up to 255 payload bytes, and the PEC byte the i2c_msg length already accounts for.",
  "published": "2026-07-19T16:17:49Z",
  "severity": "high",
  "cvss": 7.8,
  "cvssVector": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
  "epss": 0.00139,
  "epssPercentile": 0.03264,
  "priority": "High",
  "priorityTier": 3,
  "exploited": false,
  "vendorExploited": false,
  "disclosed": false,
  "fixes": [
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  "noFixYet": [],
  "dataAsOf": "2026-11-08T06:59:42Z",
  "attribution": {
    "text": "Data: Patchblox Patch Radar",
    "url": "https://patchblox.com/security/patch-radar",
    "terms": "https://patchblox.com/security/patch-radar/use-the-data"
  }
}