fkie_cve-2022-49551
Vulnerability from fkie_nvd
Published
2025-02-26 07:01
Modified
2025-03-10 21:27
Severity ?
7.1 (High) - CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H
Summary
In the Linux kernel, the following vulnerability has been resolved: usb: isp1760: Fix out-of-bounds array access Running the driver through kasan gives an interesting splat: BUG: KASAN: global-out-of-bounds in isp1760_register+0x180/0x70c Read of size 20 at addr f1db2e64 by task swapper/0/1 (...) isp1760_register from isp1760_plat_probe+0x1d8/0x220 (...) This happens because the loop reading the regmap fields for the different ISP1760 variants look like this: for (i = 0; i < HC_FIELD_MAX; i++) { ... } Meaning it expects the arrays to be at least HC_FIELD_MAX - 1 long. However the arrays isp1760_hc_reg_fields[], isp1763_hc_reg_fields[], isp1763_hc_volatile_ranges[] and isp1763_dc_volatile_ranges[] are dynamically sized during compilation. Fix this by putting an empty assignment to the [HC_FIELD_MAX] and [DC_FIELD_MAX] array member at the end of each array. This will make the array one member longer than it needs to be, but avoids the risk of overwriting whatever is inside [HC_FIELD_MAX - 1] and is simple and intuitive to read. Also add comments explaining what is going on.
References
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/26ae2c942b5702f2e43d36b2a4389cfb7d616b6aPatch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/463bddd3ff1acf4036ddb80c34a715eb99debf46Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/47d39cb57e8669e507d17d9e0d067d2b3e3a87aePatch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/bf2558bbdce3ab1d6bcba09f354914e4515d0a2bPatch
Impacted products
Vendor Product Version
linux linux_kernel *
linux linux_kernel *
linux linux_kernel *


To clipboard 

{
  "configurations": [
    {
      "nodes": [
        {
          "cpeMatch": [
            {
              "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
              "matchCriteriaId": "A27CF019-1F16-43FA-97F2-4D8F23EA7101",
              "versionEndExcluding": "5.15.46",
              "versionStartIncluding": "5.14",
              "vulnerable": true
            },
            {
              "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
              "matchCriteriaId": "15E2DD33-2255-4B76-9C15-04FF8CBAB252",
              "versionEndExcluding": "5.17.14",
              "versionStartIncluding": "5.16",
              "vulnerable": true
            },
            {
              "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
              "matchCriteriaId": "8E122216-2E9E-4B3E-B7B8-D575A45BA3C2",
              "versionEndExcluding": "5.18.3",
              "versionStartIncluding": "5.18",
              "vulnerable": true
            }
          ],
          "negate": false,
          "operator": "OR"
        }
      ]
    }
  ],
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nusb: isp1760: Fix out-of-bounds array access\n\nRunning the driver through kasan gives an interesting splat:\n\n  BUG: KASAN: global-out-of-bounds in isp1760_register+0x180/0x70c\n  Read of size 20 at addr f1db2e64 by task swapper/0/1\n  (...)\n  isp1760_register from isp1760_plat_probe+0x1d8/0x220\n  (...)\n\nThis happens because the loop reading the regmap fields for the\ndifferent ISP1760 variants look like this:\n\n  for (i = 0; i \u003c HC_FIELD_MAX; i++) { ... }\n\nMeaning it expects the arrays to be at least HC_FIELD_MAX - 1 long.\n\nHowever the arrays isp1760_hc_reg_fields[], isp1763_hc_reg_fields[],\nisp1763_hc_volatile_ranges[] and isp1763_dc_volatile_ranges[] are\ndynamically sized during compilation.\n\nFix this by putting an empty assignment to the [HC_FIELD_MAX]\nand [DC_FIELD_MAX] array member at the end of each array.\nThis will make the array one member longer than it needs to be,\nbut avoids the risk of overwriting whatever is inside\n[HC_FIELD_MAX - 1] and is simple and intuitive to read. Also\nadd comments explaining what is going on."
    },
    {
      "lang": "es",
      "value": "En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: usb: isp1760: Fix out-of-bounds array access Running the driver through kasan gives an interesting splat: BUG: KASAN: global-out-of-bounds in isp1760_register+0x180/0x70c Read of size 20 at addr f1db2e64 by task swapper/0/1 (...) isp1760_register from isp1760_plat_probe+0x1d8/0x220 (...) This happens because the loop reading the regmap fields for the different ISP1760 variants look like this: for (i = 0; i \u0026lt; HC_FIELD_MAX; i++) { ... } Meaning it expects the arrays to be at least HC_FIELD_MAX - 1 long. However the arrays isp1760_hc_reg_fields[], isp1763_hc_reg_fields[], isp1763_hc_volatile_ranges[] and isp1763_dc_volatile_ranges[]  se dimensionan din\u00e1micamente durante la compilaci\u00f3n. Solucione esto colocando una asignaci\u00f3n vac\u00eda al miembro de la matriz [HC_FIELD_MAX] y [DC_FIELD_MAX] al final de cada matriz. Esto har\u00e1 que la matriz tenga un miembro m\u00e1s de lo que necesita ser, pero evita el riesgo de sobrescribir lo que est\u00e9 dentro de [HC_FIELD_MAX - 1] y es simple e intuitivo de leer. Tambi\u00e9n agregue comentarios que expliquen lo que est\u00e1 sucediendo."
    }
  ],
  "id": "CVE-2022-49551",
  "lastModified": "2025-03-10T21:27:26.720",
  "metrics": {
    "cvssMetricV31": [
      {
        "cvssData": {
          "attackComplexity": "LOW",
          "attackVector": "LOCAL",
          "availabilityImpact": "HIGH",
          "baseScore": 7.1,
          "baseSeverity": "HIGH",
          "confidentialityImpact": "HIGH",
          "integrityImpact": "NONE",
          "privilegesRequired": "LOW",
          "scope": "UNCHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H",
          "version": "3.1"
        },
        "exploitabilityScore": 1.8,
        "impactScore": 5.2,
        "source": "nvd@nist.gov",
        "type": "Primary"
      }
    ]
  },
  "published": "2025-02-26T07:01:30.950",
  "references": [
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "tags": [
        "Patch"
      ],
      "url": "https://git.kernel.org/stable/c/26ae2c942b5702f2e43d36b2a4389cfb7d616b6a"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "tags": [
        "Patch"
      ],
      "url": "https://git.kernel.org/stable/c/463bddd3ff1acf4036ddb80c34a715eb99debf46"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "tags": [
        "Patch"
      ],
      "url": "https://git.kernel.org/stable/c/47d39cb57e8669e507d17d9e0d067d2b3e3a87ae"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "tags": [
        "Patch"
      ],
      "url": "https://git.kernel.org/stable/c/bf2558bbdce3ab1d6bcba09f354914e4515d0a2b"
    }
  ],
  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
  "vulnStatus": "Analyzed",
  "weaknesses": [
    {
      "description": [
        {
          "lang": "en",
          "value": "CWE-125"
        }
      ],
      "source": "nvd@nist.gov",
      "type": "Primary"
    }
  ]
}


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