{
  "schemaVersion": 1,
  "attribution": [
    {
      "source": "CISA Known Exploited Vulnerabilities",
      "url": "https://www.cisa.gov/known-exploited-vulnerabilities-catalog",
      "licence": "US government work"
    },
    {
      "source": "GitHub Advisory Database",
      "url": "https://github.com/advisories",
      "licence": "CC BY 4.0"
    },
    {
      "source": "Have I Been Pwned",
      "url": "https://haveibeenpwned.com/",
      "licence": "CC BY 4.0"
    },
    {
      "source": "CVE Program (CVE records)",
      "url": "https://www.cve.org/Legal/TermsOfUse",
      "licence": "CVE Terms of Use",
      "notice": "Copyright © 1999-2026, The MITRE Corporation. CVE is a trademark and the CVE logo is a registered trademark of The MITRE Corporation.",
      "terms": "CVE Usage: MITRE hereby grants you a perpetual, worldwide, non-exclusive, no-charge, royalty-free, irrevocable copyright license to reproduce, prepare derivative works of, publicly display, publicly perform, sublicense, and distribute Common Vulnerabilities and Exposures (CVE™). Any copy you make for such purposes is authorized provided that you reproduce MITRE's copyright designation and this license in any such copy."
    },
    {
      "source": "FIRST EPSS",
      "url": "https://www.first.org/epss/",
      "licence": "free to use; FIRST requests attribution"
    }
  ],
  "record": {
    "id": "CVE-2022-49434",
    "sourceURL": "https://www.cve.org/CVERecord?id=CVE-2022-49434",
    "idYear": 2022,
    "status": "PUBLISHED",
    "publishedAt": "2025-02-26T02:12:51.068Z",
    "updatedAt": "2026-05-11T18:59:44.724Z",
    "importedAt": "2026-10-24T01:56:49.724Z",
    "snapshot": {
      "id": "cve_2026-10-24_midnight_baseline",
      "at": "2026-10-24T00:00:00.000Z",
      "source": "https://github.com/CVEProject/cvelistV5/releases/tag/cve_2026-10-24_0100Z"
    },
    "facts": {
      "title": "PCI: Avoid pci_dev_lock() AB/BA deadlock with sriov_numvfs_store()",
      "summary": "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->block_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->block_cfg_access = 1 # B (2) set dev->block_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's independent\nsubsequent posting:\nhttps://lore.kernel.org/r/20220404062539.1710-1-jianjay.zhou@huawei.com]",
      "affected": [
        {
          "vendor": "Linux",
          "product": "Linux",
          "defaultStatus": "unaffected",
          "versions": [
            {
              "version": "17530e71e0166a37f8e20a9b7bcf1d50ae3cff8e",
              "status": "affected",
              "versionType": "git",
              "lessThan": "c3c6dc1853b8bf3c718f96fd8480a6eb09ba4831"
            },
            {
              "version": "17530e71e0166a37f8e20a9b7bcf1d50ae3cff8e",
              "status": "affected",
              "versionType": "git",
              "lessThan": "aed6d4d519210c28817948f34c53b6e058e0456c"
            },
            {
              "version": "17530e71e0166a37f8e20a9b7bcf1d50ae3cff8e",
              "status": "affected",
              "versionType": "git",
              "lessThan": "c9a81f9ed6ae3554621d6a50220b1bc74b67d81e"
            },
            {
              "version": "17530e71e0166a37f8e20a9b7bcf1d50ae3cff8e",
              "status": "affected",
              "versionType": "git",
              "lessThan": "eff3587b9c01439b738298475e555c028ac9f55e"
            },
            {
              "version": "17530e71e0166a37f8e20a9b7bcf1d50ae3cff8e",
              "status": "affected",
              "versionType": "git",
              "lessThan": "2cdd5284035322795b0964f899eefba254cfe483"
            },
            {
              "version": "17530e71e0166a37f8e20a9b7bcf1d50ae3cff8e",
              "status": "affected",
              "versionType": "git",
              "lessThan": "ea047f51172aa68841adef7f52d375002438b8f0"
            },
            {
              "version": "17530e71e0166a37f8e20a9b7bcf1d50ae3cff8e",
              "status": "affected",
              "versionType": "git",
              "lessThan": "59ea6b3ae51df7cd6bfd84c9c0030609b9315622"
            },
            {
              "version": "17530e71e0166a37f8e20a9b7bcf1d50ae3cff8e",
              "status": "affected",
              "versionType": "git",
              "lessThan": "a91ee0e9fca9d7501286cfbced9b30a33e52740a"
            }
          ]
        },
        {
          "vendor": "Linux",
          "product": "Linux",
          "defaultStatus": "affected",
          "versions": [
            {
              "version": "4.13",
              "status": "affected"
            },
            {
              "version": "0",
              "status": "unaffected",
              "versionType": "semver",
              "lessThan": "4.13"
            },
            {
              "version": "4.14.283",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "4.14.*"
            },
            {
              "version": "4.19.247",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "4.19.*"
            },
            {
              "version": "5.4.198",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "5.4.*"
            },
            {
              "version": "5.10.121",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "5.10.*"
            },
            {
              "version": "5.15.46",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "5.15.*"
            },
            {
              "version": "5.17.14",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "5.17.*"
            },
            {
              "version": "5.18.3",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "5.18.*"
            },
            {
              "version": "5.19",
              "status": "unaffected",
              "versionType": "original_commit_for_fix",
              "lessThanOrEqual": "*"
            }
          ]
        }
      ]
    }
  }
}