FKIE_CVE-2021-46940

Vulnerability from fkie_nvd - Published: 2024-02-27 19:04 - Updated: 2026-06-17 04:15
Severity
5.5 (Medium) - CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Summary
In the Linux kernel, the following vulnerability has been resolved: tools/power turbostat: Fix offset overflow issue in index converting The idx_to_offset() function returns type int (32-bit signed), but MSR_PKG_ENERGY_STAT is u32 and would be interpreted as a negative number. The end result is that it hits the if (offset < 0) check in update_msr_sum() which prevents the timer callback from updating the stat in the background when long durations are used. The similar issue exists in offset_to_idx() and update_msr_sum(). Fix this issue by converting the 'int' to 'off_t' accordingly.
References
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/13a779de4175df602366d129e41782ad7168cef0Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/337b1546cde87fb8588ddaedf0201b769baa572aPatch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/dbdf22fc825fdb1d97f23230064e0f9819471628Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/ea6803ff2cd1a2d7d880256bf562172b708a76ffPatch
af854a3a-2127-422b-91ae-364da2661108https://git.kernel.org/stable/c/13a779de4175df602366d129e41782ad7168cef0Patch
af854a3a-2127-422b-91ae-364da2661108https://git.kernel.org/stable/c/337b1546cde87fb8588ddaedf0201b769baa572aPatch
af854a3a-2127-422b-91ae-364da2661108https://git.kernel.org/stable/c/dbdf22fc825fdb1d97f23230064e0f9819471628Patch
af854a3a-2127-422b-91ae-364da2661108https://git.kernel.org/stable/c/ea6803ff2cd1a2d7d880256bf562172b708a76ffPatch
Impacted products
Vendor Product Version
linux linux_kernel *
linux linux_kernel *
linux linux_kernel *
To clipboard 

{
  "affected": [
    {
      "affectedData": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "tools/power/x86/turbostat/turbostat.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "ea6803ff2cd1a2d7d880256bf562172b708a76ff",
              "status": "affected",
              "version": "9972d5d84d76982606806b2ce887f70c2f8ba60a",
              "versionType": "git"
            },
            {
              "lessThan": "dbdf22fc825fdb1d97f23230064e0f9819471628",
              "status": "affected",
              "version": "9972d5d84d76982606806b2ce887f70c2f8ba60a",
              "versionType": "git"
            },
            {
              "lessThan": "337b1546cde87fb8588ddaedf0201b769baa572a",
              "status": "affected",
              "version": "9972d5d84d76982606806b2ce887f70c2f8ba60a",
              "versionType": "git"
            },
            {
              "lessThan": "13a779de4175df602366d129e41782ad7168cef0",
              "status": "affected",
              "version": "9972d5d84d76982606806b2ce887f70c2f8ba60a",
              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "tools/power/x86/turbostat/turbostat.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": "5.10.36",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.11.*",
              "status": "unaffected",
              "version": "5.11.20",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.12.*",
              "status": "unaffected",
              "version": "5.12.3",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "5.13",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    }
  ],
  "configurations": [
    {
      "nodes": [
        {
          "cpeMatch": [
            {
              "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
              "matchCriteriaId": "4E778606-3A80-42DD-996C-5570B1192986",
              "versionEndExcluding": "5.10.36",
              "versionStartIncluding": "5.10.0",
              "vulnerable": true
            },
            {
              "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
              "matchCriteriaId": "EFB425F0-C28C-4B44-8B4C-AD512AA832DE",
              "versionEndExcluding": "5.11.20",
              "versionStartIncluding": "5.11.0",
              "vulnerable": true
            },
            {
              "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
              "matchCriteriaId": "C3814FA3-8141-4313-A852-8C4212BE12AD",
              "versionEndExcluding": "5.12.3",
              "versionStartIncluding": "5.12.0",
              "vulnerable": true
            }
          ],
          "negate": false,
          "operator": "OR"
        }
      ]
    }
  ],
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "In the Linux kernel, the following vulnerability has been resolved:\n\ntools/power turbostat: Fix offset overflow issue in index converting\n\nThe idx_to_offset() function returns type int (32-bit signed), but\nMSR_PKG_ENERGY_STAT is u32 and would be interpreted as a negative number.\nThe end result is that it hits the if (offset \u003c 0) check in update_msr_sum()\nwhich prevents the timer callback from updating the stat in the background when\nlong durations are used. The similar issue exists in offset_to_idx() and\nupdate_msr_sum(). Fix this issue by converting the \u0027int\u0027 to \u0027off_t\u0027 accordingly."
    },
    {
      "lang": "es",
      "value": "En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: herramientas/turbostat de potencia: soluciona el problema de desbordamiento de compensaci\u00f3n en la conversi\u00f3n de \u00edndice. La funci\u00f3n idx_to_offset() devuelve el tipo int (32 bits firmado), pero MSR_PKG_ENERGY_STAT es u32 y se interpretar\u00eda como negativo. n\u00famero. El resultado final es que alcanza la verificaci\u00f3n if (offset \u0026lt; 0) en update_msr_sum(), lo que evita que la devoluci\u00f3n de llamada del temporizador actualice la estad\u00edstica en segundo plano cuando se utilizan duraciones prolongadas. Existe un problema similar en offset_to_idx() y update_msr_sum(). Solucione este problema convirtiendo \u0027int\u0027 a \u0027off_t\u0027 en consecuencia."
    }
  ],
  "id": "CVE-2021-46940",
  "lastModified": "2026-06-17T04:15:55.530",
  "metrics": {
    "cvssMetricV31": [
      {
        "cvssData": {
          "attackComplexity": "LOW",
          "attackVector": "LOCAL",
          "availabilityImpact": "HIGH",
          "baseScore": 5.5,
          "baseSeverity": "MEDIUM",
          "confidentialityImpact": "NONE",
          "integrityImpact": "NONE",
          "privilegesRequired": "LOW",
          "scope": "UNCHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",
          "version": "3.1"
        },
        "exploitabilityScore": 1.8,
        "impactScore": 3.6,
        "source": "nvd@nist.gov",
        "type": "Primary"
      }
    ],
    "ssvcV203": [
      {
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "ssvcData": {
          "id": "CVE-2021-46940",
          "options": [
            {
              "exploitation": "none"
            },
            {
              "automatable": "no"
            },
            {
              "technicalImpact": "partial"
            }
          ],
          "role": "CISA Coordinator",
          "timestamp": "2024-03-05T20:11:09.167869Z",
          "version": "2.0.3"
        }
      }
    ]
  },
  "published": "2024-02-27T19:04:05.927",
  "references": [
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "tags": [
        "Patch"
      ],
      "url": "https://git.kernel.org/stable/c/13a779de4175df602366d129e41782ad7168cef0"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "tags": [
        "Patch"
      ],
      "url": "https://git.kernel.org/stable/c/337b1546cde87fb8588ddaedf0201b769baa572a"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "tags": [
        "Patch"
      ],
      "url": "https://git.kernel.org/stable/c/dbdf22fc825fdb1d97f23230064e0f9819471628"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "tags": [
        "Patch"
      ],
      "url": "https://git.kernel.org/stable/c/ea6803ff2cd1a2d7d880256bf562172b708a76ff"
    },
    {
      "source": "af854a3a-2127-422b-91ae-364da2661108",
      "tags": [
        "Patch"
      ],
      "url": "https://git.kernel.org/stable/c/13a779de4175df602366d129e41782ad7168cef0"
    },
    {
      "source": "af854a3a-2127-422b-91ae-364da2661108",
      "tags": [
        "Patch"
      ],
      "url": "https://git.kernel.org/stable/c/337b1546cde87fb8588ddaedf0201b769baa572a"
    },
    {
      "source": "af854a3a-2127-422b-91ae-364da2661108",
      "tags": [
        "Patch"
      ],
      "url": "https://git.kernel.org/stable/c/dbdf22fc825fdb1d97f23230064e0f9819471628"
    },
    {
      "source": "af854a3a-2127-422b-91ae-364da2661108",
      "tags": [
        "Patch"
      ],
      "url": "https://git.kernel.org/stable/c/ea6803ff2cd1a2d7d880256bf562172b708a76ff"
    }
  ],
  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
  "vulnStatus": "Modified",
  "weaknesses": [
    {
      "description": [
        {
          "lang": "en",
          "value": "CWE-190"
        }
      ],
      "source": "nvd@nist.gov",
      "type": "Primary"
    }
  ]
}



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