CVE-2025-21656 (GCVE-0-2025-21656)

Vulnerability from cvelistv5 – Published: 2025-01-21 12:18 – Updated: 2025-05-04 07:18
VLAI?
Title
hwmon: (drivetemp) Fix driver producing garbage data when SCSI errors occur
Summary
In the Linux kernel, the following vulnerability has been resolved: hwmon: (drivetemp) Fix driver producing garbage data when SCSI errors occur scsi_execute_cmd() function can return both negative (linux codes) and positive (scsi_cmnd result field) error codes. Currently the driver just passes error codes of scsi_execute_cmd() to hwmon core, which is incorrect because hwmon only checks for negative error codes. This leads to hwmon reporting uninitialized data to userspace in case of SCSI errors (for example if the disk drive was disconnected). This patch checks scsi_execute_cmd() output and returns -EIO if it's error code is positive. [groeck: Avoid inline variable declaration for portability]
Severity ?
No CVSS data available.
Assigner
References
Impacted products
Vendor Product Version
Linux Linux Affected: 5b46903d8bf372e563bf2150d46b87fff197a109 , < 53e25b10a28edaf8c2a1d3916fd8929501a50dfc (git)
Affected: 5b46903d8bf372e563bf2150d46b87fff197a109 , < 42268d885e44af875a6474f7bba519cc6cea6a9d (git)
Affected: 5b46903d8bf372e563bf2150d46b87fff197a109 , < 82163d63ae7a4c36142cd252388737205bb7e4b9 (git)
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    Linux Linux Affected: 5.6
Unaffected: 0 , < 5.6 (semver)
Unaffected: 6.6.72 , ≤ 6.6.* (semver)
Unaffected: 6.12.10 , ≤ 6.12.* (semver)
Unaffected: 6.13 , ≤ * (original_commit_for_fix)
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{
  "containers": {
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "drivers/hwmon/drivetemp.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "53e25b10a28edaf8c2a1d3916fd8929501a50dfc",
              "status": "affected",
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              "versionType": "git"
            },
            {
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              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
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          "programFiles": [
            "drivers/hwmon/drivetemp.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "5.6"
            },
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              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
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            {
              "lessThanOrEqual": "6.6.*",
              "status": "unaffected",
              "version": "6.6.72",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.12.*",
              "status": "unaffected",
              "version": "6.12.10",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "6.13",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "cpeApplicability": [
        {
          "nodes": [
            {
              "cpeMatch": [
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.6.72",
                  "versionStartIncluding": "5.6",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.12.10",
                  "versionStartIncluding": "5.6",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.13",
                  "versionStartIncluding": "5.6",
                  "vulnerable": true
                }
              ],
              "negate": false,
              "operator": "OR"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nhwmon: (drivetemp) Fix driver producing garbage data when SCSI errors occur\n\nscsi_execute_cmd() function can return both negative (linux codes) and\npositive (scsi_cmnd result field) error codes.\n\nCurrently the driver just passes error codes of scsi_execute_cmd() to\nhwmon core, which is incorrect because hwmon only checks for negative\nerror codes. This leads to hwmon reporting uninitialized data to\nuserspace in case of SCSI errors (for example if the disk drive was\ndisconnected).\n\nThis patch checks scsi_execute_cmd() output and returns -EIO if it\u0027s\nerror code is positive.\n\n[groeck: Avoid inline variable declaration for portability]"
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2025-05-04T07:18:21.781Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/53e25b10a28edaf8c2a1d3916fd8929501a50dfc"
        },
        {
          "url": "https://git.kernel.org/stable/c/42268d885e44af875a6474f7bba519cc6cea6a9d"
        },
        {
          "url": "https://git.kernel.org/stable/c/82163d63ae7a4c36142cd252388737205bb7e4b9"
        }
      ],
      "title": "hwmon: (drivetemp) Fix driver producing garbage data when SCSI errors occur",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2025-21656",
    "datePublished": "2025-01-21T12:18:13.222Z",
    "dateReserved": "2024-12-29T08:45:45.729Z",
    "dateUpdated": "2025-05-04T07:18:21.781Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.1"
}


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  • Confirmed: The vulnerability has been validated from an analyst's perspective.
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  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.



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