Vulnerability-Lookup

FKIE_CVE-2026-74546

Vulnerability from fkie_nvd - Published: 2026-08-15 13:17 - Updated: 2026-08-19 17:21

Severity

Summary

In the Linux kernel, the following vulnerability has been resolved: hwmon: (adt7470) Fix divide-by-zero TOCTOU crash in fan speed read If the fan data becomes 0 between the FAN_DATA_VALID() check and the FAN_PERIOD_TO_RPM() conversion, it will result in a divide-by-zero crash due to a race with a concurrent update of the cached fan value. Fix a TOCTOU issue by reading fan data once.

References

	URL	Tags
	416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/009240d057e26831cc925feaba4c490209c1d0ba
	416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/1b46fe9dc8f8de59310f37e6c5e5c0e05ded46c3
	416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/689a2ea75434131d0af58aeb7d51fde40e858b4d
	416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/76963b04b2d1c648d69949d8dd521e1ff7f40b51
	416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/832069bec79cf6f903441c5769d3cdba95d0af33
	416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/96ad57d31763559d376416cdf3bf5ae79bbbebec
	416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/d328175045176f85c15c369bd21dc551351e7935

Impacted products

	Vendor	Product	Version

JSON

To clipboard

{
  "affected": [
    {
      "affectedData": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "drivers/hwmon/adt7470.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "689a2ea75434131d0af58aeb7d51fde40e858b4d",
              "status": "affected",
              "version": "fc958a61ff6d34a0ec42744d3ff524ee202b2e9f",
              "versionType": "git"
            },
            {
              "lessThan": "009240d057e26831cc925feaba4c490209c1d0ba",
              "status": "affected",
              "version": "fc958a61ff6d34a0ec42744d3ff524ee202b2e9f",
              "versionType": "git"
            },
            {
              "lessThan": "d328175045176f85c15c369bd21dc551351e7935",
              "status": "affected",
              "version": "fc958a61ff6d34a0ec42744d3ff524ee202b2e9f",
              "versionType": "git"
            },
            {
              "lessThan": "832069bec79cf6f903441c5769d3cdba95d0af33",
              "status": "affected",
              "version": "fc958a61ff6d34a0ec42744d3ff524ee202b2e9f",
              "versionType": "git"
            },
            {
              "lessThan": "96ad57d31763559d376416cdf3bf5ae79bbbebec",
              "status": "affected",
              "version": "fc958a61ff6d34a0ec42744d3ff524ee202b2e9f",
              "versionType": "git"
            },
            {
              "lessThan": "76963b04b2d1c648d69949d8dd521e1ff7f40b51",
              "status": "affected",
              "version": "fc958a61ff6d34a0ec42744d3ff524ee202b2e9f",
              "versionType": "git"
            },
            {
              "lessThan": "1b46fe9dc8f8de59310f37e6c5e5c0e05ded46c3",
              "status": "affected",
              "version": "fc958a61ff6d34a0ec42744d3ff524ee202b2e9f",
              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "drivers/hwmon/adt7470.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "5.15"
            },
            {
              "lessThan": "5.15",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.15.*",
              "status": "unaffected",
              "version": "5.15.216",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.1.*",
              "status": "unaffected",
              "version": "6.1.183",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.6.*",
              "status": "unaffected",
              "version": "6.6.151",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.12.*",
              "status": "unaffected",
              "version": "6.12.103",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.18.*",
              "status": "unaffected",
              "version": "6.18.44",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "7.1.*",
              "status": "unaffected",
              "version": "7.1.8",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "7.2",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    }
  ],
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nhwmon: (adt7470) Fix divide-by-zero TOCTOU crash in fan speed read\n\nIf the fan data becomes 0 between the FAN_DATA_VALID() check and the\nFAN_PERIOD_TO_RPM() conversion, it will result in a divide-by-zero crash\ndue to a race with a concurrent update of the cached fan value.\n\nFix a TOCTOU issue by reading fan data once."
    }
  ],
  "id": "CVE-2026-74546",
  "lastModified": "2026-08-19T17:21:09.453",
  "metrics": {},
  "published": "2026-08-15T13:17:59.950",
  "references": [
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/009240d057e26831cc925feaba4c490209c1d0ba"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/1b46fe9dc8f8de59310f37e6c5e5c0e05ded46c3"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/689a2ea75434131d0af58aeb7d51fde40e858b4d"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/76963b04b2d1c648d69949d8dd521e1ff7f40b51"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/832069bec79cf6f903441c5769d3cdba95d0af33"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/96ad57d31763559d376416cdf3bf5ae79bbbebec"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/d328175045176f85c15c369bd21dc551351e7935"
    }
  ],
  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
  "vulnStatus": "Received"
}

CVE-2026-74546 (GCVE-0-2026-74546)

Vulnerability from cvelistv5 – Published: 2026-08-15 12:27 – Updated: 2026-08-19 16:38

Title

hwmon: (adt7470) Fix divide-by-zero TOCTOU crash in fan speed read

Summary

Severity

No CVSS data available.

Assigner

Linux mitre root

References

7 references

URL	Tags
https://git.kernel.org/stable/c/689a2ea75434131d0…
https://git.kernel.org/stable/c/009240d057e26831c…
https://git.kernel.org/stable/c/d328175045176f85c…
https://git.kernel.org/stable/c/832069bec79cf6f90…
https://git.kernel.org/stable/c/96ad57d31763559d3…
https://git.kernel.org/stable/c/76963b04b2d1c648d…
https://git.kernel.org/stable/c/1b46fe9dc8f8de593…

Impacted products

2 products

Vendor	Product	Version
Linux	Linux	Affected: fc958a61ff6d34a0ec42744d3ff524ee202b2e9f , < 689a2ea75434131d0af58aeb7d51fde40e858b4d (git) Affected: fc958a61ff6d34a0ec42744d3ff524ee202b2e9f , < 009240d057e26831cc925feaba4c490209c1d0ba (git) Affected: fc958a61ff6d34a0ec42744d3ff524ee202b2e9f , < d328175045176f85c15c369bd21dc551351e7935 (git) Affected: fc958a61ff6d34a0ec42744d3ff524ee202b2e9f , < 832069bec79cf6f903441c5769d3cdba95d0af33 (git) Affected: fc958a61ff6d34a0ec42744d3ff524ee202b2e9f , < 96ad57d31763559d376416cdf3bf5ae79bbbebec (git) Affected: fc958a61ff6d34a0ec42744d3ff524ee202b2e9f , < 76963b04b2d1c648d69949d8dd521e1ff7f40b51 (git) Affected: fc958a61ff6d34a0ec42744d3ff524ee202b2e9f , < 1b46fe9dc8f8de59310f37e6c5e5c0e05ded46c3 (git)
Linux	Linux	Affected: 5.15 Unaffected: 0 , < 5.15 (semver) Unaffected: 5.15.216 , ≤ 5.15.* (semver) Unaffected: 6.1.183 , ≤ 6.1.* (semver) Unaffected: 6.6.151 , ≤ 6.6.* (semver) Unaffected: 6.12.103 , ≤ 6.12.* (semver) Unaffected: 6.18.44 , ≤ 6.18.* (semver) Unaffected: 7.1.8 , ≤ 7.1.* (semver) Unaffected: 7.2 , ≤ * (original_commit_for_fix)

Show details on NVD website

JSON

To clipboard

{
  "containers": {
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "drivers/hwmon/adt7470.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "689a2ea75434131d0af58aeb7d51fde40e858b4d",
              "status": "affected",
              "version": "fc958a61ff6d34a0ec42744d3ff524ee202b2e9f",
              "versionType": "git"
            },
            {
              "lessThan": "009240d057e26831cc925feaba4c490209c1d0ba",
              "status": "affected",
              "version": "fc958a61ff6d34a0ec42744d3ff524ee202b2e9f",
              "versionType": "git"
            },
            {
              "lessThan": "d328175045176f85c15c369bd21dc551351e7935",
              "status": "affected",
              "version": "fc958a61ff6d34a0ec42744d3ff524ee202b2e9f",
              "versionType": "git"
            },
            {
              "lessThan": "832069bec79cf6f903441c5769d3cdba95d0af33",
              "status": "affected",
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              "versionType": "git"
            },
            {
              "lessThan": "96ad57d31763559d376416cdf3bf5ae79bbbebec",
              "status": "affected",
              "version": "fc958a61ff6d34a0ec42744d3ff524ee202b2e9f",
              "versionType": "git"
            },
            {
              "lessThan": "76963b04b2d1c648d69949d8dd521e1ff7f40b51",
              "status": "affected",
              "version": "fc958a61ff6d34a0ec42744d3ff524ee202b2e9f",
              "versionType": "git"
            },
            {
              "lessThan": "1b46fe9dc8f8de59310f37e6c5e5c0e05ded46c3",
              "status": "affected",
              "version": "fc958a61ff6d34a0ec42744d3ff524ee202b2e9f",
              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "drivers/hwmon/adt7470.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "5.15"
            },
            {
              "lessThan": "5.15",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.15.*",
              "status": "unaffected",
              "version": "5.15.216",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.1.*",
              "status": "unaffected",
              "version": "6.1.183",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.6.*",
              "status": "unaffected",
              "version": "6.6.151",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.12.*",
              "status": "unaffected",
              "version": "6.12.103",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.18.*",
              "status": "unaffected",
              "version": "6.18.44",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "7.1.*",
              "status": "unaffected",
              "version": "7.1.8",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "7.2",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "cpeApplicability": [
        {
          "nodes": [
            {
              "cpeMatch": [
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "5.15.216",
                  "versionStartIncluding": "5.15",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.1.183",
                  "versionStartIncluding": "5.15",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.6.151",
                  "versionStartIncluding": "5.15",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.12.103",
                  "versionStartIncluding": "5.15",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.18.44",
                  "versionStartIncluding": "5.15",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "7.1.8",
                  "versionStartIncluding": "5.15",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "7.2",
                  "versionStartIncluding": "5.15",
                  "vulnerable": true
                }
              ],
              "negate": false,
              "operator": "OR"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nhwmon: (adt7470) Fix divide-by-zero TOCTOU crash in fan speed read\n\nIf the fan data becomes 0 between the FAN_DATA_VALID() check and the\nFAN_PERIOD_TO_RPM() conversion, it will result in a divide-by-zero crash\ndue to a race with a concurrent update of the cached fan value.\n\nFix a TOCTOU issue by reading fan data once."
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-08-19T16:38:34.886Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/689a2ea75434131d0af58aeb7d51fde40e858b4d"
        },
        {
          "url": "https://git.kernel.org/stable/c/009240d057e26831cc925feaba4c490209c1d0ba"
        },
        {
          "url": "https://git.kernel.org/stable/c/d328175045176f85c15c369bd21dc551351e7935"
        },
        {
          "url": "https://git.kernel.org/stable/c/832069bec79cf6f903441c5769d3cdba95d0af33"
        },
        {
          "url": "https://git.kernel.org/stable/c/96ad57d31763559d376416cdf3bf5ae79bbbebec"
        },
        {
          "url": "https://git.kernel.org/stable/c/76963b04b2d1c648d69949d8dd521e1ff7f40b51"
        },
        {
          "url": "https://git.kernel.org/stable/c/1b46fe9dc8f8de59310f37e6c5e5c0e05ded46c3"
        }
      ],
      "title": "hwmon: (adt7470) Fix divide-by-zero TOCTOU crash in fan speed read",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2026-74546",
    "datePublished": "2026-08-15T12:27:55.147Z",
    "dateReserved": "2026-08-15T05:44:03.914Z",
    "dateUpdated": "2026-08-19T16:38:34.886Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}

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.

The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base model, served locally by ML-Gateway. They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.

Action not permitted

FKIE_CVE-2026-74546

CVE-2026-74546 (GCVE-0-2026-74546)

Tags

Sightings

Nomenclature