fkie_cve-2022-48854
Vulnerability from fkie_nvd
Published
2024-07-16 13:15
Modified
2024-11-21 07:34
Severity ?
7.8 (High) - CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Summary
In the Linux kernel, the following vulnerability has been resolved: net: arc_emac: Fix use after free in arc_mdio_probe() If bus->state is equal to MDIOBUS_ALLOCATED, mdiobus_free(bus) will free the "bus". But bus->name is still used in the next line, which will lead to a use after free. We can fix it by putting the name in a local variable and make the bus->name point to the rodata section "name",then use the name in the error message without referring to bus to avoid the uaf.
References
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/84c831803785c2c3bec5c28c0e8a0b72f6b41d4dPatch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/bc0e610a6eb0d46e4123fafdbe5e6141d9fff3bePatch
af854a3a-2127-422b-91ae-364da2661108https://git.kernel.org/stable/c/84c831803785c2c3bec5c28c0e8a0b72f6b41d4dPatch
af854a3a-2127-422b-91ae-364da2661108https://git.kernel.org/stable/c/bc0e610a6eb0d46e4123fafdbe5e6141d9fff3bePatch
Impacted products
Vendor Product Version
linux linux_kernel *


To clipboard 

{
  "configurations": [
    {
      "nodes": [
        {
          "cpeMatch": [
            {
              "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
              "matchCriteriaId": "83FDEDF2-0E19-4879-91FD-171E66D1B335",
              "versionEndExcluding": "5.16.15",
              "versionStartIncluding": "5.16",
              "vulnerable": true
            }
          ],
          "negate": false,
          "operator": "OR"
        }
      ]
    }
  ],
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnet: arc_emac: Fix use after free in arc_mdio_probe()\n\nIf bus-\u003estate is equal to MDIOBUS_ALLOCATED, mdiobus_free(bus) will free\nthe \"bus\". But bus-\u003ename is still used in the next line, which will lead\nto a use after free.\n\nWe can fix it by putting the name in a local variable and make the\nbus-\u003ename point to the rodata section \"name\",then use the name in the\nerror message without referring to bus to avoid the uaf."
    },
    {
      "lang": "es",
      "value": "En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: net: arc_emac: corrige el use after free en arc_mdio_probe() Si bus-\u0026gt;state es igual a MDIOBUS_ALLOCATED, mdiobus_free(bus) liberar\u00e1 el \"bus\". Pero bus-\u0026gt;name todav\u00eda se usa en la siguiente l\u00ednea, lo que conducir\u00e1 a un uso posterior a free. Podemos solucionarlo poniendo el nombre en una variable local y haciendo que bus-\u0026gt;nombre apunte a la secci\u00f3n \"nombre\" de rodata, luego use el nombre en el mensaje de error sin hacer referencia al bus para evitar el uaf."
    }
  ],
  "id": "CVE-2022-48854",
  "lastModified": "2024-11-21T07:34:13.107",
  "metrics": {
    "cvssMetricV31": [
      {
        "cvssData": {
          "attackComplexity": "LOW",
          "attackVector": "LOCAL",
          "availabilityImpact": "HIGH",
          "baseScore": 7.8,
          "baseSeverity": "HIGH",
          "confidentialityImpact": "HIGH",
          "integrityImpact": "HIGH",
          "privilegesRequired": "LOW",
          "scope": "UNCHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
          "version": "3.1"
        },
        "exploitabilityScore": 1.8,
        "impactScore": 5.9,
        "source": "nvd@nist.gov",
        "type": "Primary"
      }
    ]
  },
  "published": "2024-07-16T13:15:12.457",
  "references": [
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "tags": [
        "Patch"
      ],
      "url": "https://git.kernel.org/stable/c/84c831803785c2c3bec5c28c0e8a0b72f6b41d4d"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "tags": [
        "Patch"
      ],
      "url": "https://git.kernel.org/stable/c/bc0e610a6eb0d46e4123fafdbe5e6141d9fff3be"
    },
    {
      "source": "af854a3a-2127-422b-91ae-364da2661108",
      "tags": [
        "Patch"
      ],
      "url": "https://git.kernel.org/stable/c/84c831803785c2c3bec5c28c0e8a0b72f6b41d4d"
    },
    {
      "source": "af854a3a-2127-422b-91ae-364da2661108",
      "tags": [
        "Patch"
      ],
      "url": "https://git.kernel.org/stable/c/bc0e610a6eb0d46e4123fafdbe5e6141d9fff3be"
    }
  ],
  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
  "vulnStatus": "Modified",
  "weaknesses": [
    {
      "description": [
        {
          "lang": "en",
          "value": "CWE-416"
        }
      ],
      "source": "nvd@nist.gov",
      "type": "Primary"
    }
  ]
}


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