{
  "affected": [
    {
      "ranges": [
        {
          "events": [
            {
              "introduced": "407dc802a9c0809ca6a48de4b4c63305eb84ef56"
            },
            {
              "fixed": "7896d87cbb05e097efc113243d4e38f9f8cea16c"
            },
            {
              "fixed": "9d5309500b4607b7198e19f0a3fa13eb864cd5fb"
            },
            {
              "fixed": "6098634cfa711f11a8d65368dc51ec8f7c8241ba"
            },
            {
              "fixed": "60c4b9fe1a3dd012014b1f561a6928a0b5db1126"
            },
            {
              "fixed": "83e039f0a43e0708515b0479cb7690fb93faaaa0"
            },
            {
              "fixed": "97a9cf2a8217ca1cdaf48cb9ab26e471632c7e7f"
            },
            {
              "fixed": "dd47b8c4a0a8ced442da3f008db28fbbd31feaf0"
            },
            {
              "fixed": "43cae21424ff8e33894a0f86c6b80b840c049fd7"
            }
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "type": "GIT"
        }
      ]
    },
    {
      "package": {
        "ecosystem": "Linux",
        "name": "Kernel"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "5.10.0"
            },
            {
              "fixed": "5.10.258"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "5.11.0"
            },
            {
              "fixed": "5.15.209"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "5.16.0"
            },
            {
              "fixed": "6.1.175"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.2.0"
            },
            {
              "fixed": "6.6.142"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.7.0"
            },
            {
              "fixed": "6.12.92"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.13.0"
            },
            {
              "fixed": "6.18.34"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.19.0"
            },
            {
              "fixed": "7.0.11"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "database_specific": {
    "cna_assigner": "Linux",
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/64xxx/CVE-2026-64085.json"
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nhwmon: (pmbus/adm1266) bounce blackbox records through a protocol-sized buffer\n\nadm1266_pmbus_block_xfer() copies the device-supplied block payload\ninto the caller-provided buffer using the device-supplied length:\n\n\tmemcpy(data_r, \u0026msgs[1].buf[1], msgs[1].buf[0]);\n\nThe helper does not know how large data_r is and trusts the device to\nreturn at most one record's worth of bytes.  adm1266_nvmem_read_blackbox()\nviolates that contract: it advances read_buff inside data-\u003edev_mem in\nADM1266_BLACKBOX_SIZE (64-byte) strides while the helper is willing to\nwrite up to ADM1266_PMBUS_BLOCK_MAX (255) bytes.  A device that returns\nmore than 64 bytes on the trailing record (read_buff offset 1984 in\nthe 2048-byte dev_mem allocation) overflows dev_mem by up to 191 bytes\nbefore the post-call\n\n\tif (ret != ADM1266_BLACKBOX_SIZE)\n\t\treturn -EIO;\n\ncan reject the response.\n\nContain the fix in the caller without changing the helper signature:\nread each record into a 255-byte local bounce buffer that matches the\nhelper's maximum output, validate the returned length, and only then\ncopy exactly ADM1266_BLACKBOX_SIZE bytes into the dev_mem slot.",
  "id": "CVE-2026-64085",
  "modified": "2026-07-21T03:42:08.885617628Z",
  "published": "2026-07-19T15:39:56.067Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/43cae21424ff8e33894a0f86c6b80b840c049fd7"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/6098634cfa711f11a8d65368dc51ec8f7c8241ba"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/60c4b9fe1a3dd012014b1f561a6928a0b5db1126"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/7896d87cbb05e097efc113243d4e38f9f8cea16c"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/83e039f0a43e0708515b0479cb7690fb93faaaa0"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/97a9cf2a8217ca1cdaf48cb9ab26e471632c7e7f"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/9d5309500b4607b7198e19f0a3fa13eb864cd5fb"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/dd47b8c4a0a8ced442da3f008db28fbbd31feaf0"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/64xxx/CVE-2026-64085.json"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-64085"
    },
    {
      "type": "PACKAGE",
      "url": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"
    }
  ],
  "schema_version": "1.8.0",
  "summary": "hwmon: (pmbus/adm1266) bounce blackbox records through a protocol-sized buffer"
}