nvd-json-data-feeds/CVE-2021/CVE-2021-476xx/CVE-2021-47631.json

{
  "id": "CVE-2021-47631",
  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
  "published": "2025-02-26T06:37:04.400",
  "lastModified": "2025-03-18T19:35:26.410",
  "vulnStatus": "Analyzed",
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nARM: davinci: da850-evm: Avoid NULL pointer dereference\n\nWith newer versions of GCC, there is a panic in da850_evm_config_emac()\nwhen booting multi_v5_defconfig in QEMU under the palmetto-bmc machine:\n\nUnable to handle kernel NULL pointer dereference at virtual address 00000020\npgd = (ptrval)\n[00000020] *pgd=00000000\nInternal error: Oops: 5 [#1] PREEMPT ARM\nModules linked in:\nCPU: 0 PID: 1 Comm: swapper Not tainted 5.15.0 #1\nHardware name: Generic DT based system\nPC is at da850_evm_config_emac+0x1c/0x120\nLR is at do_one_initcall+0x50/0x1e0\n\nThe emac_pdata pointer in soc_info is NULL because davinci_soc_info only\ngets populated on davinci machines but da850_evm_config_emac() is called\non all machines via device_initcall().\n\nMove the rmii_en assignment below the machine check so that it is only\ndereferenced when running on a supported SoC."
    },
    {
      "lang": "es",
      "value": "En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: ARM: davinci: da850-evm: Evitar la desreferencia de puntero NULL Con versiones m\u00e1s nuevas de GCC, hay un p\u00e1nico en da850_evm_config_emac() al iniciar multi_v5_defconfig en QEMU bajo la m\u00e1quina palmetto-bmc: No se puede manejar la desreferencia de puntero NULL del kernel en la direcci\u00f3n virtual 00000020 pgd = (ptrval) [00000020] *pgd=00000000 Error interno: Oops: 5 [#1] PREEMPT M\u00f3dulos ARM vinculados: CPU: 0 PID: 1 Comm: swapper No contaminado 5.15.0 #1 Nombre del hardware: Sistema gen\u00e9rico basado en DT La PC est\u00e1 en da850_evm_config_emac+0x1c/0x120 LR est\u00e1 en El puntero emac_pdata en soc_info es NULL porque davinci_soc_info solo se completa en m\u00e1quinas davinci, pero se llama a da850_evm_config_emac() en todas las m\u00e1quinas a trav\u00e9s de device_initcall(). Mueva la asignaci\u00f3n rmii_en debajo de la verificaci\u00f3n de la m\u00e1quina para que solo se desreferencia cuando se ejecuta en un SoC compatible."
    }
  ],
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        "source": "nvd@nist.gov",
        "type": "Primary",
        "cvssData": {
          "version": "3.1",
          "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",
          "baseScore": 5.5,
          "baseSeverity": "MEDIUM",
          "attackVector": "LOCAL",
          "attackComplexity": "LOW",
          "privilegesRequired": "LOW",
          "userInteraction": "NONE",
          "scope": "UNCHANGED",
          "confidentialityImpact": "NONE",
          "integrityImpact": "NONE",
          "availabilityImpact": "HIGH"
        },
        "exploitabilityScore": 1.8,
        "impactScore": 3.6
      }
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      "type": "Primary",
      "description": [
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          "value": "CWE-476"
        }
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