{
  "affected": [
    {
      "ranges": [
        {
          "events": [
            {
              "introduced": "15609d1893020436e1e8ccfd9ded774a96dd17a2"
            },
            {
              "fixed": "adcb163ad7cacca317872fc62bd8885e842e45e3"
            },
            {
              "fixed": "c2c56092710fe8a893b67b5a3d7e62808d02d84d"
            },
            {
              "fixed": "5469e1e7c411acc15fdd8262c99c3ebd9defd594"
            },
            {
              "fixed": "f85c81e93dbd6915970bd5f3bffcf62633c4c54c"
            },
            {
              "fixed": "0e791cd0140fb136083565aadfbe0f705aa260d0"
            },
            {
              "fixed": "75c862adf3d3caab4f49bb3530723c215376e37c"
            },
            {
              "fixed": "231db52a5b64d0a9769e298dadc148e1f79b26a6"
            },
            {
              "fixed": "4afca954622d672ea65ed961bed01cf91caa034e"
            }
          ],
          "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-2026-64087.json"
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nhwmon: (pmbus/adm1266) reject implausible blackbox record_count\n\nadm1266_nvmem_read_blackbox() loops over a record_count that comes\nstraight from byte 3 of the BLACKBOX_INFO response.  The destination\nbuffer is data-\u003edev_mem, sized for the nvmem cell's declared 2048\nbytes (ADM1266_BLACKBOX_MAX_RECORDS * ADM1266_BLACKBOX_SIZE = 32 * 64).\nA device that reports a record_count greater than 32 -- whether due\nto firmware bugs, bus corruption, or a non-responsive slave returning\n0xff -- would walk read_buff past the end of the dev_mem allocation\non the trailing iterations.\n\nCap record_count at ADM1266_BLACKBOX_MAX_RECORDS (introduced here)\nbefore entering the loop and return -EIO on any larger value, so a\nmalformed BLACKBOX_INFO response cannot drive the loop out of bounds.",
  "id": "CVE-2026-64087",
  "modified": "2026-07-21T03:42:05.737632232Z",
  "published": "2026-07-19T15:39:57.371Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/0e791cd0140fb136083565aadfbe0f705aa260d0"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/231db52a5b64d0a9769e298dadc148e1f79b26a6"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/4afca954622d672ea65ed961bed01cf91caa034e"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/5469e1e7c411acc15fdd8262c99c3ebd9defd594"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/75c862adf3d3caab4f49bb3530723c215376e37c"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/adcb163ad7cacca317872fc62bd8885e842e45e3"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/c2c56092710fe8a893b67b5a3d7e62808d02d84d"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/f85c81e93dbd6915970bd5f3bffcf62633c4c54c"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/64xxx/CVE-2026-64087.json"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-64087"
    },
    {
      "type": "PACKAGE",
      "url": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"
    }
  ],
  "schema_version": "1.8.0",
  "summary": "hwmon: (pmbus/adm1266) reject implausible blackbox record_count"
}