fkie_cve-2021-47202
Vulnerability from fkie_nvd
Published
2024-04-10 19:15
Modified
2025-01-14 14:42
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: thermal: Fix NULL pointer dereferences in of_thermal_ functions of_parse_thermal_zones() parses the thermal-zones node and registers a thermal_zone device for each subnode. However, if a thermal zone is consuming a thermal sensor and that thermal sensor device hasn't probed yet, an attempt to set trip_point_*_temp for that thermal zone device can cause a NULL pointer dereference. Fix it. console:/sys/class/thermal/thermal_zone87 # echo 120000 > trip_point_0_temp ... Unable to handle kernel NULL pointer dereference at virtual address 0000000000000020 ... Call trace: of_thermal_set_trip_temp+0x40/0xc4 trip_point_temp_store+0xc0/0x1dc dev_attr_store+0x38/0x88 sysfs_kf_write+0x64/0xc0 kernfs_fop_write_iter+0x108/0x1d0 vfs_write+0x2f4/0x368 ksys_write+0x7c/0xec __arm64_sys_write+0x20/0x30 el0_svc_common.llvm.7279915941325364641+0xbc/0x1bc do_el0_svc+0x28/0xa0 el0_svc+0x14/0x24 el0_sync_handler+0x88/0xec el0_sync+0x1c0/0x200 While at it, fix the possible NULL pointer dereference in other functions as well: of_thermal_get_temp(), of_thermal_set_emul_temp(), of_thermal_get_trend().
References
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/0750f769b95841b34a9fe8c418dd792ff526bf86Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/6a315471cb6a07f651e1d3adc8962730f4fcccacPatch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/828f4c31684da94ecf0b44a2cbd35bbede04f0bdPatch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/96cfe05051fd8543cdedd6807ec59a0e6c409195Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/ef2590a5305e0b8e9342f84c2214aa478ee7f28ePatch
af854a3a-2127-422b-91ae-364da2661108https://git.kernel.org/stable/c/0750f769b95841b34a9fe8c418dd792ff526bf86Patch
af854a3a-2127-422b-91ae-364da2661108https://git.kernel.org/stable/c/6a315471cb6a07f651e1d3adc8962730f4fcccacPatch
af854a3a-2127-422b-91ae-364da2661108https://git.kernel.org/stable/c/828f4c31684da94ecf0b44a2cbd35bbede04f0bdPatch
af854a3a-2127-422b-91ae-364da2661108https://git.kernel.org/stable/c/96cfe05051fd8543cdedd6807ec59a0e6c409195Patch
af854a3a-2127-422b-91ae-364da2661108https://git.kernel.org/stable/c/ef2590a5305e0b8e9342f84c2214aa478ee7f28ePatch
Impacted products
Vendor Product Version
linux linux_kernel *
linux linux_kernel *
linux linux_kernel *
linux linux_kernel *


To clipboard 

{
  "configurations": [
    {
      "nodes": [
        {
          "cpeMatch": [
            {
              "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
              "matchCriteriaId": "769A1563-4E73-4FA2-BDEB-9DBD40989582",
              "versionEndExcluding": "5.4.210",
              "vulnerable": true
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              "matchCriteriaId": "36581F45-F01C-4014-84F2-F7F59F4F5D10",
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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\nthermal: Fix NULL pointer dereferences in of_thermal_ functions\n\nof_parse_thermal_zones() parses the thermal-zones node and registers a\nthermal_zone device for each subnode. However, if a thermal zone is\nconsuming a thermal sensor and that thermal sensor device hasn\u0027t probed\nyet, an attempt to set trip_point_*_temp for that thermal zone device\ncan cause a NULL pointer dereference. Fix it.\n\n console:/sys/class/thermal/thermal_zone87 # echo 120000 \u003e trip_point_0_temp\n ...\n Unable to handle kernel NULL pointer dereference at virtual address 0000000000000020\n ...\n Call trace:\n  of_thermal_set_trip_temp+0x40/0xc4\n  trip_point_temp_store+0xc0/0x1dc\n  dev_attr_store+0x38/0x88\n  sysfs_kf_write+0x64/0xc0\n  kernfs_fop_write_iter+0x108/0x1d0\n  vfs_write+0x2f4/0x368\n  ksys_write+0x7c/0xec\n  __arm64_sys_write+0x20/0x30\n  el0_svc_common.llvm.7279915941325364641+0xbc/0x1bc\n  do_el0_svc+0x28/0xa0\n  el0_svc+0x14/0x24\n  el0_sync_handler+0x88/0xec\n  el0_sync+0x1c0/0x200\n\nWhile at it, fix the possible NULL pointer dereference in other\nfunctions as well: of_thermal_get_temp(), of_thermal_set_emul_temp(),\nof_thermal_get_trend()."
    },
    {
      "lang": "es",
      "value": "En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: thermal: Fix NULL pointer dereferences in of_thermal_ functions of_parse_thermal_zones() analiza el nodo thermal-zones y registra un dispositivo thermal_zone para cada subnodo. Sin embargo, si una zona t\u00e9rmica est\u00e1 consumiendo un sensor t\u00e9rmico y ese dispositivo de sensor t\u00e9rmico a\u00fan no ha realizado la prueba, un intento de establecer trip_point_*_temp para ese dispositivo de zona t\u00e9rmica puede provocar una desreferencia de puntero NULL. Arr\u00e9glelo. console:/sys/class/thermal/thermal_zone87 # echo 120000 \u0026gt; trip_point_0_temp ... No se puede manejar la desreferencia del puntero NULL del n\u00facleo en la direcci\u00f3n virtual 0000000000000020 ... Seguimiento de llamadas: of_thermal_set_trip_temp+0x40/0xc4 trip_point_temp_store+0xc0/0x1dc dev_attr_store+0x38/0x88 sysfs_kf_write+0x64/0xc0 kernfs_fop_write_iter+0x108/0x1d0 vfs_write+0x2f4/0x368 ksys_write+0x7c/0xec __arm64_sys_write+0x20/0x30 el0_svc_common.llvm.7279915941325364641+0xbc/0x1bc do_el0_svc+0x28/0xa0 el0_svc+0x14/0x24 el0_sync_handler+0x88/0xec el0_sync+0x1c0/0x200 Mientras tanto, corrija tambi\u00e9n la posible desreferencia del puntero NULL en otras funciones: of_thermal_get_temp(), of_thermal_set_emul_temp(), of_thermal_get_trend()."
    }
  ],
  "id": "CVE-2021-47202",
  "lastModified": "2025-01-14T14:42:43.193",
  "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": "2024-04-10T19:15:48.167",
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      "tags": [
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    },
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      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
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    },
    {
      "source": "af854a3a-2127-422b-91ae-364da2661108",
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      "url": "https://git.kernel.org/stable/c/0750f769b95841b34a9fe8c418dd792ff526bf86"
    },
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    {
      "source": "af854a3a-2127-422b-91ae-364da2661108",
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  ],
  "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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