fkie_cve-2024-49941
Vulnerability from fkie_nvd
Published
2024-10-21 18:15
Modified
2024-10-25 15:17
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: gpiolib: Fix potential NULL pointer dereference in gpiod_get_label() In `gpiod_get_label()`, it is possible that `srcu_dereference_check()` may return a NULL pointer, leading to a scenario where `label->str` is accessed without verifying if `label` itself is NULL. This patch adds a proper NULL check for `label` before accessing `label->str`. The check for `label->str != NULL` is removed because `label->str` can never be NULL if `label` is not NULL. This fixes the issue where the label name was being printed as `(efault)` when dumping the sysfs GPIO file when `label == NULL`.
References
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/7b99b5ab885993bff010ebcd93be5e511c56e28aPatch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/9ee4b907d7a5d7a53b4ff7727c371ff3d44ccbbbPatch
Impacted products
Vendor Product Version
linux linux_kernel *
linux linux_kernel 6.12


To clipboard 

{
  "configurations": [
    {
      "nodes": [
        {
          "cpeMatch": [
            {
              "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
              "matchCriteriaId": "4AFC8E2E-533A-4A7D-A42F-F36A6F1445C6",
              "versionEndExcluding": "6.11.3",
              "versionStartIncluding": "6.9",
              "vulnerable": true
            },
            {
              "criteria": "cpe:2.3:o:linux:linux_kernel:6.12:rc1:*:*:*:*:*:*",
              "matchCriteriaId": "7F361E1D-580F-4A2D-A509-7615F73167A1",
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          "negate": false,
          "operator": "OR"
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  ],
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "In the Linux kernel, the following vulnerability has been resolved:\n\ngpiolib: Fix potential NULL pointer dereference in gpiod_get_label()\n\nIn `gpiod_get_label()`, it is possible that `srcu_dereference_check()` may\nreturn a NULL pointer, leading to a scenario where `label-\u003estr` is accessed\nwithout verifying if `label` itself is NULL.\n\nThis patch adds a proper NULL check for `label` before accessing\n`label-\u003estr`. The check for `label-\u003estr != NULL` is removed because\n`label-\u003estr` can never be NULL if `label` is not NULL.\n\nThis fixes the issue where the label name was being printed as `(efault)`\nwhen dumping the sysfs GPIO file when `label == NULL`."
    },
    {
      "lang": "es",
      "value": "En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: gpiolib: Corrige la posible desreferencia de puntero NULL en gpiod_get_label() En `gpiod_get_label()`, es posible que `srcu_dereference_check()` pueda devolver un puntero NULL, lo que lleva a un escenario en el que se accede a `label-\u0026gt;str` sin verificar si `label` en s\u00ed es NULL. Este parche agrega una comprobaci\u00f3n NULL adecuada para `label` antes de acceder a `label-\u0026gt;str`. La comprobaci\u00f3n para `label-\u0026gt;str != NULL` se elimina porque `label-\u0026gt;str` nunca puede ser NULL si `label` no es NULL. Esto corrige el problema en el que el nombre de la etiqueta se imprim\u00eda como `(efault)` al volcar el archivo GPIO de sysfs cuando `label == NULL`."
    }
  ],
  "id": "CVE-2024-49941",
  "lastModified": "2024-10-25T15:17:30.543",
  "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"
      }
    ]
  },
  "published": "2024-10-21T18:15:15.780",
  "references": [
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "tags": [
        "Patch"
      ],
      "url": "https://git.kernel.org/stable/c/7b99b5ab885993bff010ebcd93be5e511c56e28a"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "tags": [
        "Patch"
      ],
      "url": "https://git.kernel.org/stable/c/9ee4b907d7a5d7a53b4ff7727c371ff3d44ccbbb"
    }
  ],
  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
  "vulnStatus": "Analyzed",
  "weaknesses": [
    {
      "description": [
        {
          "lang": "en",
          "value": "CWE-476"
        }
      ],
      "source": "nvd@nist.gov",
      "type": "Primary"
    }
  ]
}


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