{
  "cveId": "CVE-2026-64135",
  "url": "https://patchblox.com/security/cve/CVE-2026-64135",
  "summary": "CVE-2026-64135 is fixed in 16 products on 1 platform, first by DEBIAN-CVE-2026-64135, released July 20, 2026. It is not reported as exploited. Patch Radar priority: Routine.",
  "title": "linux: In the Linux kernel, the following vulnerability has been resolved:  hwmon: (pmbus/adm1266) widen blackbox-info buffe...",
  "description": "In the Linux kernel, the following vulnerability has been resolved:  hwmon: (pmbus/adm1266) widen blackbox-info buffer to I2C_SMBUS_BLOCK_MAX  adm1266_nvmem_read_blackbox() declares a 5-byte stack buffer and passes it to i2c_smbus_read_block_data() to retrieve the 4-byte BLACKBOX_INFO response.  i2c_smbus_read_block_data() does not honour caller buffer sizes -- it memcpy()s data.block[0] bytes from the SMBus transaction (where data.block[0] is the length byte returned by the slave device, up to I2C_SMBUS_BLOCK_MAX = 32):  \tmemcpy(values, \u0026data.block[1], data.block[0]);  If the device returns any block length above 5, the call overflows the caller\u0027s 5-byte stack buffer before the post-call  \tif (ret != 4) \t\treturn -EIO;  check has a chance to reject the response.  Widen the local buffer to I2C_SMBUS_BLOCK_MAX so the helper has room for any well-formed SMBus block response, matching the convention used by the other i2c_smbus_read_block_data() callers in this driver.",
  "published": "2026-07-19T16:17:55Z",
  "severity": "medium",
  "cvss": 5.5,
  "cvssVector": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",
  "epss": 0.00123,
  "epssPercentile": 0.02046,
  "priority": "Routine",
  "priorityTier": 4,
  "exploited": false,
  "vendorExploited": false,
  "disclosed": false,
  "fixes": [
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      "released": "2026-09-22T15:26:20Z"
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      "fix": "OPENSUSE-SU-2026:21910-1",
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      "released": "2026-09-22T15:26:20Z"
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      "fix": "SUSE-SU-2026:4254-1",
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  "noFixYet": [],
  "dataAsOf": "2026-11-08T19:12:23Z",
  "attribution": {
    "text": "Data: Patchblox Patch Radar",
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    "terms": "https://patchblox.com/security/patch-radar/use-the-data"
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}