FKIE_CVE-2022-49434

Vulnerability from fkie_nvd - Published: 2025-02-26 07:01 - Updated: 2025-12-23 14:16
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: PCI: Avoid pci_dev_lock() AB/BA deadlock with sriov_numvfs_store() The sysfs sriov_numvfs_store() path acquires the device lock before the config space access lock: sriov_numvfs_store device_lock # A (1) acquire device lock sriov_configure vfio_pci_sriov_configure # (for example) vfio_pci_core_sriov_configure pci_disable_sriov sriov_disable pci_cfg_access_lock pci_wait_cfg # B (4) wait for dev->block_cfg_access == 0 Previously, pci_dev_lock() acquired the config space access lock before the device lock: pci_dev_lock pci_cfg_access_lock dev->block_cfg_access = 1 # B (2) set dev->block_cfg_access = 1 device_lock # A (3) wait for device lock Any path that uses pci_dev_lock(), e.g., pci_reset_function(), may deadlock with sriov_numvfs_store() if the operations occur in the sequence (1) (2) (3) (4). Avoid the deadlock by reversing the order in pci_dev_lock() so it acquires the device lock before the config space access lock, the same as the sriov_numvfs_store() path. [bhelgaas: combined and adapted commit log from Jay Zhou's independent subsequent posting: https://lore.kernel.org/r/20220404062539.1710-1-jianjay.zhou@huawei.com]
References
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/2cdd5284035322795b0964f899eefba254cfe483Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/59ea6b3ae51df7cd6bfd84c9c0030609b9315622Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/a91ee0e9fca9d7501286cfbced9b30a33e52740aPatch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/aed6d4d519210c28817948f34c53b6e058e0456cPatch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/c3c6dc1853b8bf3c718f96fd8480a6eb09ba4831Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/c9a81f9ed6ae3554621d6a50220b1bc74b67d81ePatch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/ea047f51172aa68841adef7f52d375002438b8f0Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/eff3587b9c01439b738298475e555c028ac9f55ePatch
Impacted products
Vendor Product Version
linux linux_kernel *
linux linux_kernel *
linux linux_kernel *
linux linux_kernel *
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": "0D4D4067-974D-4560-8320-22FDA399E3F9",
              "versionEndExcluding": "4.9.318",
              "vulnerable": true
            },
            {
              "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
              "matchCriteriaId": "D6823775-2653-4644-A0D4-4E6E68F10C65",
              "versionEndExcluding": "4.14.283",
              "versionStartIncluding": "4.10",
              "vulnerable": true
            },
            {
              "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
              "matchCriteriaId": "B8CFA0F4-2D75-41F4-9753-87944A08B53B",
              "versionEndExcluding": "4.19.247",
              "versionStartIncluding": "4.15",
              "vulnerable": true
            },
            {
              "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
              "matchCriteriaId": "3EC49633-14DE-4EBD-BB80-76AE2E3EABB9",
              "versionEndExcluding": "5.4.198",
              "versionStartIncluding": "4.20",
              "vulnerable": true
            },
            {
              "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
              "matchCriteriaId": "34ACD872-E5BC-401C-93D5-B357A62426E0",
              "versionEndExcluding": "5.10.121",
              "versionStartIncluding": "5.5",
              "vulnerable": true
            },
            {
              "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
              "matchCriteriaId": "20D41697-0E8B-4B7D-8842-F17BF2AA21E1",
              "versionEndExcluding": "5.15.46",
              "versionStartIncluding": "5.11",
              "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\nPCI: Avoid pci_dev_lock() AB/BA deadlock with sriov_numvfs_store()\n\nThe sysfs sriov_numvfs_store() path acquires the device lock before the\nconfig space access lock:\n\n  sriov_numvfs_store\n    device_lock                 # A (1) acquire device lock\n    sriov_configure\n      vfio_pci_sriov_configure  # (for example)\n        vfio_pci_core_sriov_configure\n          pci_disable_sriov\n            sriov_disable\n              pci_cfg_access_lock\n                pci_wait_cfg    # B (4) wait for dev-\u003eblock_cfg_access == 0\n\nPreviously, pci_dev_lock() acquired the config space access lock before the\ndevice lock:\n\n  pci_dev_lock\n    pci_cfg_access_lock\n      dev-\u003eblock_cfg_access = 1 # B (2) set dev-\u003eblock_cfg_access = 1\n    device_lock                 # A (3) wait for device lock\n\nAny path that uses pci_dev_lock(), e.g., pci_reset_function(), may\ndeadlock with sriov_numvfs_store() if the operations occur in the sequence\n(1) (2) (3) (4).\n\nAvoid the deadlock by reversing the order in pci_dev_lock() so it acquires\nthe device lock before the config space access lock, the same as the\nsriov_numvfs_store() path.\n\n[bhelgaas: combined and adapted commit log from Jay Zhou\u0027s independent\nsubsequent posting:\nhttps://lore.kernel.org/r/20220404062539.1710-1-jianjay.zhou@huawei.com]"
    },
    {
      "lang": "es",
      "value": "En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: PCI: evitar el bloqueo AB/BA de pci_dev_lock() con sriov_numvfs_store() La ruta sysfs sriov_numvfs_store() adquiere el bloqueo del dispositivo antes del bloqueo de acceso al espacio de configuraci\u00f3n: sriov_numvfs_store device_lock # A (1) adquirir bloqueo del dispositivo sriov_configure vfio_pci_sriov_configure # (por ejemplo) vfio_pci_core_sriov_configure pci_disable_sriov sriov_disable pci_cfg_access_lock pci_wait_cfg # B (4) esperar a que dev-\u0026gt;block_cfg_access == 0 Anteriormente, pci_dev_lock() adquir\u00eda el bloqueo de acceso al espacio de configuraci\u00f3n antes del bloqueo del dispositivo: pci_dev_lock pci_cfg_access_lock dev-\u0026gt;block_cfg_access = 1 # B (2) set dev-\u0026gt;block_cfg_access = 1 device_lock # A (3) esperar a que se bloquee el dispositivo Cualquier ruta que use pci_dev_lock(), p. ej., pci_reset_function(), puede bloquearse con sriov_numvfs_store() si las operaciones ocurren en la secuencia (1) (2) (3) (4). Evite el bloqueo invirtiendo el orden en pci_dev_lock() para que adquiera el bloqueo del dispositivo antes del bloqueo de acceso al espacio de configuraci\u00f3n, lo mismo que la ruta sriov_numvfs_store(). [bhelgaas: registro de confirmaci\u00f3n combinado y adaptado de la publicaci\u00f3n posterior independiente de Jay Zhou: https://lore.kernel.org/r/20220404062539.1710-1-jianjay.zhou@huawei.com]"
    }
  ],
  "id": "CVE-2022-49434",
  "lastModified": "2025-12-23T14:16:12.633",
  "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": "2025-02-26T07:01:19.863",
  "references": [
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "tags": [
        "Patch"
      ],
      "url": "https://git.kernel.org/stable/c/2cdd5284035322795b0964f899eefba254cfe483"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "tags": [
        "Patch"
      ],
      "url": "https://git.kernel.org/stable/c/59ea6b3ae51df7cd6bfd84c9c0030609b9315622"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "tags": [
        "Patch"
      ],
      "url": "https://git.kernel.org/stable/c/a91ee0e9fca9d7501286cfbced9b30a33e52740a"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "tags": [
        "Patch"
      ],
      "url": "https://git.kernel.org/stable/c/aed6d4d519210c28817948f34c53b6e058e0456c"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "tags": [
        "Patch"
      ],
      "url": "https://git.kernel.org/stable/c/c3c6dc1853b8bf3c718f96fd8480a6eb09ba4831"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "tags": [
        "Patch"
      ],
      "url": "https://git.kernel.org/stable/c/c9a81f9ed6ae3554621d6a50220b1bc74b67d81e"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "tags": [
        "Patch"
      ],
      "url": "https://git.kernel.org/stable/c/ea047f51172aa68841adef7f52d375002438b8f0"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "tags": [
        "Patch"
      ],
      "url": "https://git.kernel.org/stable/c/eff3587b9c01439b738298475e555c028ac9f55e"
    }
  ],
  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
  "vulnStatus": "Modified",
  "weaknesses": [
    {
      "description": [
        {
          "lang": "en",
          "value": "CWE-667"
        }
      ],
      "source": "nvd@nist.gov",
      "type": "Primary"
    }
  ]
}


Log in or create an account to share your comment.




Tags
Taxonomy of the tags.




Sightings

Author Source Type Date

Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
  • Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
  • Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.



Detection rules are retrieved from Rulezet.