« Volver al listado

CVE-2024-50122

Estado: ModificadaMedia (5.5)—

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

PCI: Hold rescan lock while adding devices during host probe

Since adding the PCI power control code, we may end up with a race between the pwrctl platform device rescanning the bus and host controller probe functions. The latter need to take the rescan lock when adding devices or we may end up in an undefined state having two incompletely added devices and hit the following crash when trying to remove the device over sysfs:

Detalles técnicos trazas, registros y código del informe original
  Unable to handle kernel NULL pointer dereference at virtual address 0000000000000000
  Internal error: Oops: 0000000096000004 [#1] SMP
  Call trace:
    __pi_strlen+0x14/0x150
    kernfs_find_ns+0x80/0x13c
    kernfs_remove_by_name_ns+0x54/0xf0
    sysfs_remove_bin_file+0x24/0x34
    pci_remove_resource_files+0x3c/0x84
    pci_remove_sysfs_dev_files+0x28/0x38
    pci_stop_bus_device+0x8c/0xd8
    pci_stop_bus_device+0x40/0xd8
    pci_stop_and_remove_bus_device_locked+0x28/0x48
    remove_store+0x70/0xb0
    dev_attr_store+0x20/0x38
    sysfs_kf_write+0x58/0x78
    kernfs_fop_write_iter+0xe8/0x184
    vfs_write+0x2dc/0x308
    ksys_write+0x7c/0xec

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-2024-50122",
  "cveTags": [],
  "metrics": {
    "ssvcV203": [
      {
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "ssvcData": {
          "id": "CVE-2024-50122",
          "role": "CISA Coordinator",
          "options": [
            {
              "exploitation": "none"
            },
            {
              "automatable": "no"
            },
            {
              "technicalImpact": "partial"
            }
          ],
          "version": "2.0.3",
          "timestamp": "2025-10-01T20:21:40.173055Z"
        }
      }
    ],
    "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
      },
      {
        "type": "Secondary",
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "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
      }
    ]
  },
  "affected": [
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "affectedData": [
        {
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "product": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "4565d2652a37e438e4cd729e2a8dfeffe34c958c",
              "lessThan": "d4f38a0e7cc94615f63cf7765ca117e5cc2773ae",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "4565d2652a37e438e4cd729e2a8dfeffe34c958c",
              "lessThan": "1d59d474e1cb7d4fdf87dfaf96f44647f13ea590",
              "versionType": "git"
            }
          ],
          "programFiles": [
            "drivers/pci/probe.c"
          ],
          "defaultStatus": "unaffected"
        },
        {
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "product": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "6.11"
            },
            {
              "status": "unaffected",
              "version": "0",
              "lessThan": "6.11",
              "versionType": "semver"
            },
            {
              "status": "unaffected",
              "version": "6.11.6",
              "versionType": "semver",
              "lessThanOrEqual": "6.11.*"
            },
            {
              "status": "unaffected",
              "version": "6.12",
              "versionType": "original_commit_for_fix",
              "lessThanOrEqual": "*"
            }
          ],
          "programFiles": [
            "drivers/pci/probe.c"
          ],
          "defaultStatus": "affected"
        }
      ]
    }
  ],
  "published": "2024-11-05T18:15:15.210",
  "references": [
    {
      "url": "https://git.kernel.org/stable/c/1d59d474e1cb7d4fdf87dfaf96f44647f13ea590",
      "tags": [
        "Patch"
      ],
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/d4f38a0e7cc94615f63cf7765ca117e5cc2773ae",
      "tags": [
        "Patch"
      ],
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    }
  ],
  "vulnStatus": "Modified",
  "weaknesses": [
    {
      "type": "Primary",
      "source": "nvd@nist.gov",
      "description": [
        {
          "lang": "en",
          "value": "CWE-476"
        }
      ]
    },
    {
      "type": "Secondary",
      "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
      "description": [
        {
          "lang": "en",
          "value": "CWE-476"
        }
      ]
    }
  ],
  "descriptions": [
    {
      "lang": "en",
      "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nPCI: Hold rescan lock while adding devices during host probe\n\nSince adding the PCI power control code, we may end up with a race between\nthe pwrctl platform device rescanning the bus and host controller probe\nfunctions. The latter need to take the rescan lock when adding devices or\nwe may end up in an undefined state having two incompletely added devices\nand hit the following crash when trying to remove the device over sysfs:\n\n  Unable to handle kernel NULL pointer dereference at virtual address 0000000000000000\n  Internal error: Oops: 0000000096000004 [#1] SMP\n  Call trace:\n    __pi_strlen+0x14/0x150\n    kernfs_find_ns+0x80/0x13c\n    kernfs_remove_by_name_ns+0x54/0xf0\n    sysfs_remove_bin_file+0x24/0x34\n    pci_remove_resource_files+0x3c/0x84\n    pci_remove_sysfs_dev_files+0x28/0x38\n    pci_stop_bus_device+0x8c/0xd8\n    pci_stop_bus_device+0x40/0xd8\n    pci_stop_and_remove_bus_device_locked+0x28/0x48\n    remove_store+0x70/0xb0\n    dev_attr_store+0x20/0x38\n    sysfs_kf_write+0x58/0x78\n    kernfs_fop_write_iter+0xe8/0x184\n    vfs_write+0x2dc/0x308\n    ksys_write+0x7c/0xec"
    },
    {
      "lang": "es",
      "value": "En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: PCI: Mantener el bloqueo de rescaneo mientras se agregan dispositivos durante la sonda del host. Desde que se agregó el código de control de energía PCI, podemos terminar con una ejecución entre el dispositivo de la plataforma pwrctl que vuelve a escanear el bus y las funciones de sonda del controlador del host. Estos últimos deben tomar el bloqueo de rescan al agregar dispositivos o podemos terminar en un estado indefinido con dos dispositivos agregados de forma incompleta y encontrar el siguiente bloqueo al intentar eliminar el dispositivo a través de sysfs: No se puede manejar la desreferencia del puntero NULL del kernel en la dirección virtual 0000000000000000 Error interno: Oops: 0000000096000004 [#1] Rastreo de llamadas SMP: __pi_strlen+0x14/0x150 kernfs_find_ns+0x80/0x13c kernfs_remove_by_name_ns+0x54/0xf0 sysfs_remove_bin_file+0x24/0x34 pci_remove_resource_files+0x3c/0x84 pci_remove_sysfs_dev_files+0x28/0x38 pci_stop_bus_device+0x8c/0xd8 pci_stop_bus_device+0x40/0xd8 pci_stop_and_remove_bus_device_locked+0x28/0x48 remove_store+0x70/0xb0 dev_attr_store+0x20/0x38 sysfs_kf_write+0x58/0x78 kernfs_fop_write_iter+0xe8/0x184 vfs_write+0x2dc/0x308 ksys_write+0x7c/0xec"
    }
  ],
  "lastModified": "2026-06-17T08:03:38.750",
  "configurations": [
    {
      "nodes": [
        {
          "negate": false,
          "cpeMatch": [
            {
              "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "35973F0F-C32F-4D88-B0FE-C75F65A0002B",
              "versionEndExcluding": "6.11.6",
              "versionStartIncluding": "6.11"
            },
            {
              "criteria": "cpe:2.3:o:linux:linux_kernel:6.12:rc1:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "7F361E1D-580F-4A2D-A509-7615F73167A1"
            },
            {
              "criteria": "cpe:2.3:o:linux:linux_kernel:6.12:rc2:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "925478D0-3E3D-4E6F-ACD5-09F28D5DF82C"
            },
            {
              "criteria": "cpe:2.3:o:linux:linux_kernel:6.12:rc3:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "3C95E234-D335-4B6C-96BF-E2CEBD8654ED"
            },
            {
              "criteria": "cpe:2.3:o:linux:linux_kernel:6.12:rc4:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "E0F717D8-3014-4F84-8086-0124B2111379"
            }
          ],
          "operator": "OR"
        }
      ]
    }
  ],
  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
}