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CVE-2022-50304

Estado: AnalizadaMedia (5.5)—

In the Linux kernel, the following vulnerability has been resolved:

mtd: core: fix possible resource leak in init_mtd()

I got the error report while inject fault in init_mtd():

If init_mtdchar() fails in init_mtd(), mtd_bdi will not be unregistered, as a result, we can't load the mtd module again, to fix this by calling bdi_unregister(mtd_bdi) after out_procfs label.

Detalles técnicos trazas, registros y código del informe original
sysfs: cannot create duplicate filename '/devices/virtual/bdi/mtd-0'
Call Trace:
 <TASK>
 dump_stack_lvl+0x67/0x83
 sysfs_warn_dup+0x60/0x70
 sysfs_create_dir_ns+0x109/0x120
 kobject_add_internal+0xce/0x2f0
 kobject_add+0x98/0x110
 device_add+0x179/0xc00
 device_create_groups_vargs+0xf4/0x100
 device_create+0x7b/0xb0
 bdi_register_va.part.13+0x58/0x2d0
 bdi_register+0x9b/0xb0
 init_mtd+0x62/0x171 [mtd]
 do_one_initcall+0x6c/0x3c0
 do_init_module+0x58/0x222
 load_module+0x268e/0x27d0
 __do_sys_finit_module+0xd5/0x140
 do_syscall_64+0x37/0x90
 entry_SYSCALL_64_after_hwframe+0x63/0xcd
 </TASK>
kobject_add_internal failed for mtd-0 with -EEXIST, don't try to register
	things with the same name in the same directory.
Error registering mtd class or bdi: -17

CVSS

Probabilidad de explotación (EPSS)

EPSS (Exploit Prediction Scoring System, de FIRST) estima la probabilidad de que una vulnerabilidad sea explotada en 30 días. Complementa a CVSS (impacto) y a CISA KEV (explotación confirmada).

Tecnologías afectadas (1)

Linux — Linux Kernel

CWE

Referencias

JSON original (NVD)

Mostrar
{
  "id": "CVE-2022-50304",
  "cveTags": [],
  "metrics": {
    "cvssMetricV31": [
      {
        "type": "Primary",
        "source": "nvd@nist.gov",
        "cvssData": {
          "scope": "UNCHANGED",
          "version": "3.1",
          "baseScore": 5.5,
          "attackVector": "LOCAL",
          "baseSeverity": "MEDIUM",
          "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",
          "integrityImpact": "NONE",
          "userInteraction": "NONE",
          "attackComplexity": "LOW",
          "availabilityImpact": "HIGH",
          "privilegesRequired": "LOW",
          "confidentialityImpact": "NONE"
        },
        "impactScore": 3.6,
        "exploitabilityScore": 1.8
      }
    ]
  },
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      "affectedData": [
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          "vendor": "Linux",
          "product": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "445caaa20c4d6da74f426464f90513b81157ad77",
              "lessThan": "78816504100cbd8e6836df9f58cc4fbb8b262f1c",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "445caaa20c4d6da74f426464f90513b81157ad77",
              "lessThan": "26c304a3f136009c5a2a04e2bf3ac6aa25aabcb4",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "445caaa20c4d6da74f426464f90513b81157ad77",
              "lessThan": "1aadf01e5076b9ab6bf294b9622335c651314895",
              "versionType": "git"
            }
          ],
          "programFiles": [
            "drivers/mtd/mtdcore.c"
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          "defaultStatus": "unaffected"
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        {
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          "product": "Linux",
          "versions": [
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              "version": "4.10"
            },
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              "lessThan": "4.10",
              "versionType": "semver"
            },
            {
              "status": "unaffected",
              "version": "6.0.16",
              "versionType": "semver",
              "lessThanOrEqual": "6.0.*"
            },
            {
              "status": "unaffected",
              "version": "6.1.2",
              "versionType": "semver",
              "lessThanOrEqual": "6.1.*"
            },
            {
              "status": "unaffected",
              "version": "6.2",
              "versionType": "original_commit_for_fix",
              "lessThanOrEqual": "*"
            }
          ],
          "programFiles": [
            "drivers/mtd/mtdcore.c"
          ],
          "defaultStatus": "affected"
        }
      ]
    }
  ],
  "published": "2025-09-15T15:15:41.953",
  "references": [
    {
      "url": "https://git.kernel.org/stable/c/1aadf01e5076b9ab6bf294b9622335c651314895",
      "tags": [
        "Patch"
      ],
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/26c304a3f136009c5a2a04e2bf3ac6aa25aabcb4",
      "tags": [
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      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/78816504100cbd8e6836df9f58cc4fbb8b262f1c",
      "tags": [
        "Patch"
      ],
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    }
  ],
  "vulnStatus": "Analyzed",
  "weaknesses": [
    {
      "type": "Primary",
      "source": "nvd@nist.gov",
      "description": [
        {
          "lang": "en",
          "value": "CWE-401"
        }
      ]
    }
  ],
  "descriptions": [
    {
      "lang": "en",
      "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nmtd: core: fix possible resource leak in init_mtd()\n\nI got the error report while inject fault in init_mtd():\n\nsysfs: cannot create duplicate filename '/devices/virtual/bdi/mtd-0'\nCall Trace:\n <TASK>\n dump_stack_lvl+0x67/0x83\n sysfs_warn_dup+0x60/0x70\n sysfs_create_dir_ns+0x109/0x120\n kobject_add_internal+0xce/0x2f0\n kobject_add+0x98/0x110\n device_add+0x179/0xc00\n device_create_groups_vargs+0xf4/0x100\n device_create+0x7b/0xb0\n bdi_register_va.part.13+0x58/0x2d0\n bdi_register+0x9b/0xb0\n init_mtd+0x62/0x171 [mtd]\n do_one_initcall+0x6c/0x3c0\n do_init_module+0x58/0x222\n load_module+0x268e/0x27d0\n __do_sys_finit_module+0xd5/0x140\n do_syscall_64+0x37/0x90\n entry_SYSCALL_64_after_hwframe+0x63/0xcd\n </TASK>\nkobject_add_internal failed for mtd-0 with -EEXIST, don't try to register\n\tthings with the same name in the same directory.\nError registering mtd class or bdi: -17\n\nIf init_mtdchar() fails in init_mtd(), mtd_bdi will not be unregistered,\nas a result, we can't load the mtd module again, to fix this by calling\nbdi_unregister(mtd_bdi) after out_procfs label."
    }
  ],
  "lastModified": "2026-06-17T05:23:11.620",
  "configurations": [
    {
      "nodes": [
        {
          "negate": false,
          "cpeMatch": [
            {
              "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "A3EF624E-E9CE-49B8-A5E4-45BA8B355B48",
              "versionEndExcluding": "6.0.16",
              "versionStartIncluding": "4.10"
            },
            {
              "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "77239F4B-6BB2-4B9E-A654-36A52396116C",
              "versionEndExcluding": "6.1.2",
              "versionStartIncluding": "6.1"
            }
          ],
          "operator": "OR"
        }
      ]
    }
  ],
  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
}