CVE-2026-64087 (GCVE-0-2026-64087)

Vulnerability from cvelistv5 – Published: 2026-07-19 15:39 – Updated: 2026-07-19 15:39
VLAI
Title
hwmon: (pmbus/adm1266) reject implausible blackbox record_count
Summary
In the Linux kernel, the following vulnerability has been resolved: hwmon: (pmbus/adm1266) reject implausible blackbox record_count adm1266_nvmem_read_blackbox() loops over a record_count that comes straight from byte 3 of the BLACKBOX_INFO response. The destination buffer is data->dev_mem, sized for the nvmem cell's declared 2048 bytes (ADM1266_BLACKBOX_MAX_RECORDS * ADM1266_BLACKBOX_SIZE = 32 * 64). A device that reports a record_count greater than 32 -- whether due to firmware bugs, bus corruption, or a non-responsive slave returning 0xff -- would walk read_buff past the end of the dev_mem allocation on the trailing iterations. Cap record_count at ADM1266_BLACKBOX_MAX_RECORDS (introduced here) before entering the loop and return -EIO on any larger value, so a malformed BLACKBOX_INFO response cannot drive the loop out of bounds.
Severity
No CVSS data available.
Assigner
References
Impacted products
Vendor Product Version
Linux Linux Affected: 15609d1893020436e1e8ccfd9ded774a96dd17a2 , < adcb163ad7cacca317872fc62bd8885e842e45e3 (git)
Affected: 15609d1893020436e1e8ccfd9ded774a96dd17a2 , < c2c56092710fe8a893b67b5a3d7e62808d02d84d (git)
Affected: 15609d1893020436e1e8ccfd9ded774a96dd17a2 , < 5469e1e7c411acc15fdd8262c99c3ebd9defd594 (git)
Affected: 15609d1893020436e1e8ccfd9ded774a96dd17a2 , < f85c81e93dbd6915970bd5f3bffcf62633c4c54c (git)
Affected: 15609d1893020436e1e8ccfd9ded774a96dd17a2 , < 0e791cd0140fb136083565aadfbe0f705aa260d0 (git)
Affected: 15609d1893020436e1e8ccfd9ded774a96dd17a2 , < 75c862adf3d3caab4f49bb3530723c215376e37c (git)
Affected: 15609d1893020436e1e8ccfd9ded774a96dd17a2 , < 231db52a5b64d0a9769e298dadc148e1f79b26a6 (git)
Affected: 15609d1893020436e1e8ccfd9ded774a96dd17a2 , < 4afca954622d672ea65ed961bed01cf91caa034e (git)
Create a notification for this product.
Linux Linux Affected: 5.10
Unaffected: 0 , < 5.10 (semver)
Unaffected: 5.10.258 , ≤ 5.10.* (semver)
Unaffected: 5.15.209 , ≤ 5.15.* (semver)
Unaffected: 6.1.175 , ≤ 6.1.* (semver)
Unaffected: 6.6.142 , ≤ 6.6.* (semver)
Unaffected: 6.12.92 , ≤ 6.12.* (semver)
Unaffected: 6.18.34 , ≤ 6.18.* (semver)
Unaffected: 7.0.11 , ≤ 7.0.* (semver)
Unaffected: 7.1 , ≤ * (original_commit_for_fix)
Create a notification for this product.
Show details on NVD website
To clipboard 

{
  "containers": {
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "drivers/hwmon/pmbus/adm1266.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "adcb163ad7cacca317872fc62bd8885e842e45e3",
              "status": "affected",
              "version": "15609d1893020436e1e8ccfd9ded774a96dd17a2",
              "versionType": "git"
            },
            {
              "lessThan": "c2c56092710fe8a893b67b5a3d7e62808d02d84d",
              "status": "affected",
              "version": "15609d1893020436e1e8ccfd9ded774a96dd17a2",
              "versionType": "git"
            },
            {
              "lessThan": "5469e1e7c411acc15fdd8262c99c3ebd9defd594",
              "status": "affected",
              "version": "15609d1893020436e1e8ccfd9ded774a96dd17a2",
              "versionType": "git"
            },
            {
              "lessThan": "f85c81e93dbd6915970bd5f3bffcf62633c4c54c",
              "status": "affected",
              "version": "15609d1893020436e1e8ccfd9ded774a96dd17a2",
              "versionType": "git"
            },
            {
              "lessThan": "0e791cd0140fb136083565aadfbe0f705aa260d0",
              "status": "affected",
              "version": "15609d1893020436e1e8ccfd9ded774a96dd17a2",
              "versionType": "git"
            },
            {
              "lessThan": "75c862adf3d3caab4f49bb3530723c215376e37c",
              "status": "affected",
              "version": "15609d1893020436e1e8ccfd9ded774a96dd17a2",
              "versionType": "git"
            },
            {
              "lessThan": "231db52a5b64d0a9769e298dadc148e1f79b26a6",
              "status": "affected",
              "version": "15609d1893020436e1e8ccfd9ded774a96dd17a2",
              "versionType": "git"
            },
            {
              "lessThan": "4afca954622d672ea65ed961bed01cf91caa034e",
              "status": "affected",
              "version": "15609d1893020436e1e8ccfd9ded774a96dd17a2",
              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "drivers/hwmon/pmbus/adm1266.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "5.10"
            },
            {
              "lessThan": "5.10",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.10.*",
              "status": "unaffected",
              "version": "5.10.258",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.15.*",
              "status": "unaffected",
              "version": "5.15.209",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.1.*",
              "status": "unaffected",
              "version": "6.1.175",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.6.*",
              "status": "unaffected",
              "version": "6.6.142",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.12.*",
              "status": "unaffected",
              "version": "6.12.92",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.18.*",
              "status": "unaffected",
              "version": "6.18.34",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "7.0.*",
              "status": "unaffected",
              "version": "7.0.11",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "7.1",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "cpeApplicability": [
        {
          "nodes": [
            {
              "cpeMatch": [
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "5.10.258",
                  "versionStartIncluding": "5.10",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "5.15.209",
                  "versionStartIncluding": "5.10",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.1.175",
                  "versionStartIncluding": "5.10",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.6.142",
                  "versionStartIncluding": "5.10",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.12.92",
                  "versionStartIncluding": "5.10",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.18.34",
                  "versionStartIncluding": "5.10",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "7.0.11",
                  "versionStartIncluding": "5.10",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "7.1",
                  "versionStartIncluding": "5.10",
                  "vulnerable": true
                }
              ],
              "negate": false,
              "operator": "OR"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "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\u0027s 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."
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-07-19T15:39:57.371Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/adcb163ad7cacca317872fc62bd8885e842e45e3"
        },
        {
          "url": "https://git.kernel.org/stable/c/c2c56092710fe8a893b67b5a3d7e62808d02d84d"
        },
        {
          "url": "https://git.kernel.org/stable/c/5469e1e7c411acc15fdd8262c99c3ebd9defd594"
        },
        {
          "url": "https://git.kernel.org/stable/c/f85c81e93dbd6915970bd5f3bffcf62633c4c54c"
        },
        {
          "url": "https://git.kernel.org/stable/c/0e791cd0140fb136083565aadfbe0f705aa260d0"
        },
        {
          "url": "https://git.kernel.org/stable/c/75c862adf3d3caab4f49bb3530723c215376e37c"
        },
        {
          "url": "https://git.kernel.org/stable/c/231db52a5b64d0a9769e298dadc148e1f79b26a6"
        },
        {
          "url": "https://git.kernel.org/stable/c/4afca954622d672ea65ed961bed01cf91caa034e"
        }
      ],
      "title": "hwmon: (pmbus/adm1266) reject implausible blackbox record_count",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2026-64087",
    "datePublished": "2026-07-19T15:39:57.371Z",
    "dateReserved": "2026-07-19T07:54:57.032Z",
    "dateUpdated": "2026-07-19T15:39:57.371Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2",
  "vulnerability-lookup:meta": {
    "epss": {
      "cve": "CVE-2026-64087",
      "date": "2026-07-21",
      "epss": "0.00184",
      "percentile": "0.0825"
    },
    "nvd": "{\"cve\":{\"id\":\"CVE-2026-64087\",\"sourceIdentifier\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"published\":\"2026-07-19T16:17:49.433\",\"lastModified\":\"2026-07-19T16:17:49.433\",\"vulnStatus\":\"Received\",\"cveTags\":[],\"descriptions\":[{\"lang\":\"en\",\"value\":\"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\u0027s 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.\"}],\"affected\":[{\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"affectedData\":[{\"vendor\":\"Linux\",\"product\":\"Linux\",\"defaultStatus\":\"unaffected\",\"programFiles\":[\"drivers/hwmon/pmbus/adm1266.c\"],\"repo\":\"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\"versions\":[{\"version\":\"15609d1893020436e1e8ccfd9ded774a96dd17a2\",\"lessThan\":\"adcb163ad7cacca317872fc62bd8885e842e45e3\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"15609d1893020436e1e8ccfd9ded774a96dd17a2\",\"lessThan\":\"c2c56092710fe8a893b67b5a3d7e62808d02d84d\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"15609d1893020436e1e8ccfd9ded774a96dd17a2\",\"lessThan\":\"5469e1e7c411acc15fdd8262c99c3ebd9defd594\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"15609d1893020436e1e8ccfd9ded774a96dd17a2\",\"lessThan\":\"f85c81e93dbd6915970bd5f3bffcf62633c4c54c\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"15609d1893020436e1e8ccfd9ded774a96dd17a2\",\"lessThan\":\"0e791cd0140fb136083565aadfbe0f705aa260d0\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"15609d1893020436e1e8ccfd9ded774a96dd17a2\",\"lessThan\":\"75c862adf3d3caab4f49bb3530723c215376e37c\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"15609d1893020436e1e8ccfd9ded774a96dd17a2\",\"lessThan\":\"231db52a5b64d0a9769e298dadc148e1f79b26a6\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"15609d1893020436e1e8ccfd9ded774a96dd17a2\",\"lessThan\":\"4afca954622d672ea65ed961bed01cf91caa034e\",\"versionType\":\"git\",\"status\":\"affected\"}]},{\"vendor\":\"Linux\",\"product\":\"Linux\",\"defaultStatus\":\"affected\",\"programFiles\":[\"drivers/hwmon/pmbus/adm1266.c\"],\"repo\":\"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\"versions\":[{\"version\":\"5.10\",\"status\":\"affected\"},{\"version\":\"0\",\"lessThan\":\"5.10\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"5.10.258\",\"lessThanOrEqual\":\"5.10.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"5.15.209\",\"lessThanOrEqual\":\"5.15.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.1.175\",\"lessThanOrEqual\":\"6.1.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.6.142\",\"lessThanOrEqual\":\"6.6.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.12.92\",\"lessThanOrEqual\":\"6.12.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.18.34\",\"lessThanOrEqual\":\"6.18.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"7.0.11\",\"lessThanOrEqual\":\"7.0.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"7.1\",\"lessThanOrEqual\":\"*\",\"versionType\":\"original_commit_for_fix\",\"status\":\"unaffected\"}]}]}],\"metrics\":{},\"references\":[{\"url\":\"https://git.kernel.org/stable/c/0e791cd0140fb136083565aadfbe0f705aa260d0\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/231db52a5b64d0a9769e298dadc148e1f79b26a6\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/4afca954622d672ea65ed961bed01cf91caa034e\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/5469e1e7c411acc15fdd8262c99c3ebd9defd594\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/75c862adf3d3caab4f49bb3530723c215376e37c\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/adcb163ad7cacca317872fc62bd8885e842e45e3\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/c2c56092710fe8a893b67b5a3d7e62808d02d84d\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/f85c81e93dbd6915970bd5f3bffcf62633c4c54c\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"}]}}",
    "redhat_vex": {
      "aggregate_severity": "None",
      "current_release_date": "2026-07-21T08:03:04+00:00",
      "cve": "CVE-2026-64087",
      "id": "CVE-2026-64087",
      "initial_release_date": "2026-07-19T00:00:00+00:00",
      "product_status:known_affected": "76",
      "product_status:known_not_affected": "198",
      "source": "Red Hat CSAF VEX",
      "status": "final",
      "title": "kernel: hwmon: (pmbus/adm1266) reject implausible blackbox record_count",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-64087.json",
      "version": "3"
    }
  }
}



Log in or create an account to share your comment.




Tags
Taxonomy of the tags.





Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

Sightings

Author Source Type Date Other

Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
  • Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
  • Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.


Detection rules are retrieved from Rulezet.