{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2022-49434","assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","state":"PUBLISHED","assignerShortName":"Linux","dateReserved":"2025-02-26T02:08:31.570Z","datePublished":"2025-02-26T02:12:51.068Z","dateUpdated":"2025-12-23T13:23:58.869Z"},"containers":{"cna":{"providerMetadata":{"orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","shortName":"Linux","dateUpdated":"2025-12-23T13:23:58.869Z"},"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->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":[{"product":"Linux","vendor":"Linux","defaultStatus":"unaffected","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/pci/pci.c"],"versions":[{"version":"17530e71e0166a37f8e20a9b7bcf1d50ae3cff8e","lessThan":"c3c6dc1853b8bf3c718f96fd8480a6eb09ba4831","status":"affected","versionType":"git"},{"version":"17530e71e0166a37f8e20a9b7bcf1d50ae3cff8e","lessThan":"aed6d4d519210c28817948f34c53b6e058e0456c","status":"affected","versionType":"git"},{"version":"17530e71e0166a37f8e20a9b7bcf1d50ae3cff8e","lessThan":"c9a81f9ed6ae3554621d6a50220b1bc74b67d81e","status":"affected","versionType":"git"},{"version":"17530e71e0166a37f8e20a9b7bcf1d50ae3cff8e","lessThan":"eff3587b9c01439b738298475e555c028ac9f55e","status":"affected","versionType":"git"},{"version":"17530e71e0166a37f8e20a9b7bcf1d50ae3cff8e","lessThan":"2cdd5284035322795b0964f899eefba254cfe483","status":"affected","versionType":"git"},{"version":"17530e71e0166a37f8e20a9b7bcf1d50ae3cff8e","lessThan":"ea047f51172aa68841adef7f52d375002438b8f0","status":"affected","versionType":"git"},{"version":"17530e71e0166a37f8e20a9b7bcf1d50ae3cff8e","lessThan":"59ea6b3ae51df7cd6bfd84c9c0030609b9315622","status":"affected","versionType":"git"},{"version":"17530e71e0166a37f8e20a9b7bcf1d50ae3cff8e","lessThan":"a91ee0e9fca9d7501286cfbced9b30a33e52740a","status":"affected","versionType":"git"}]},{"product":"Linux","vendor":"Linux","defaultStatus":"affected","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/pci/pci.c"],"versions":[{"version":"4.13","status":"affected"},{"version":"0","lessThan":"4.13","status":"unaffected","versionType":"semver"},{"version":"4.14.283","lessThanOrEqual":"4.14.*","status":"unaffected","versionType":"semver"},{"version":"4.19.247","lessThanOrEqual":"4.19.*","status":"unaffected","versionType":"semver"},{"version":"5.4.198","lessThanOrEqual":"5.4.*","status":"unaffected","versionType":"semver"},{"version":"5.10.121","lessThanOrEqual":"5.10.*","status":"unaffected","versionType":"semver"},{"version":"5.15.46","lessThanOrEqual":"5.15.*","status":"unaffected","versionType":"semver"},{"version":"5.17.14","lessThanOrEqual":"5.17.*","status":"unaffected","versionType":"semver"},{"version":"5.18.3","lessThanOrEqual":"5.18.*","status":"unaffected","versionType":"semver"},{"version":"5.19","lessThanOrEqual":"*","status":"unaffected","versionType":"original_commit_for_fix"}]}],"cpeApplicability":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.13","versionEndExcluding":"4.14.283"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.13","versionEndExcluding":"4.19.247"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.13","versionEndExcluding":"5.4.198"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.13","versionEndExcluding":"5.10.121"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.13","versionEndExcluding":"5.15.46"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.13","versionEndExcluding":"5.17.14"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.13","versionEndExcluding":"5.18.3"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.13","versionEndExcluding":"5.19"}]}]}],"references":[{"url":"https://git.kernel.org/stable/c/c3c6dc1853b8bf3c718f96fd8480a6eb09ba4831"},{"url":"https://git.kernel.org/stable/c/aed6d4d519210c28817948f34c53b6e058e0456c"},{"url":"https://git.kernel.org/stable/c/c9a81f9ed6ae3554621d6a50220b1bc74b67d81e"},{"url":"https://git.kernel.org/stable/c/eff3587b9c01439b738298475e555c028ac9f55e"},{"url":"https://git.kernel.org/stable/c/2cdd5284035322795b0964f899eefba254cfe483"},{"url":"https://git.kernel.org/stable/c/ea047f51172aa68841adef7f52d375002438b8f0"},{"url":"https://git.kernel.org/stable/c/59ea6b3ae51df7cd6bfd84c9c0030609b9315622"},{"url":"https://git.kernel.org/stable/c/a91ee0e9fca9d7501286cfbced9b30a33e52740a"}],"title":"PCI: Avoid pci_dev_lock() AB/BA deadlock with sriov_numvfs_store()","x_generator":{"engine":"bippy-1.2.0"}}}}