{
    "dataType": "CVE_RECORD",
    "dataVersion": "5.2",
    "cveMetadata": {
        "cveId": "CVE-2022-50636",
        "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "state": "PUBLISHED",
        "assignerShortName": "Linux",
        "dateReserved": "2025-12-08T23:57:43.370Z",
        "datePublished": "2025-12-09T00:00:09.737Z",
        "dateUpdated": "2026-05-11T19:22:40.799Z"
    },
    "containers": {
        "cna": {
            "providerMetadata": {
                "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
                "shortName": "Linux",
                "dateUpdated": "2026-05-11T19:22:40.799Z"
            },
            "descriptions": [
                {
                    "lang": "en",
                    "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nPCI: Fix pci_device_is_present() for VFs by checking PF\n\npci_device_is_present() previously didn't work for VFs because it reads the\nVendor and Device ID, which are 0xffff for VFs, which looks like they\naren't present.  Check the PF instead.\n\nWei Gong reported that if virtio I/O is in progress when the driver is\nunbound or \"0\" is written to /sys/.../sriov_numvfs, the virtio I/O\noperation hangs, which may result in output like this:\n\n  task:bash state:D stack:    0 pid: 1773 ppid:  1241 flags:0x00004002\n  Call Trace:\n   schedule+0x4f/0xc0\n   blk_mq_freeze_queue_wait+0x69/0xa0\n   blk_mq_freeze_queue+0x1b/0x20\n   blk_cleanup_queue+0x3d/0xd0\n   virtblk_remove+0x3c/0xb0 [virtio_blk]\n   virtio_dev_remove+0x4b/0x80\n   ...\n   device_unregister+0x1b/0x60\n   unregister_virtio_device+0x18/0x30\n   virtio_pci_remove+0x41/0x80\n   pci_device_remove+0x3e/0xb0\n\nThis happened because pci_device_is_present(VF) returned \"false\" in\nvirtio_pci_remove(), so it called virtio_break_device().  The broken vq\nmeant that vring_interrupt() skipped the vq.callback() that would have\ncompleted the virtio I/O operation via virtblk_done().\n\n[bhelgaas: commit log, simplify to always use pci_physfn(), add stable tag]"
                }
            ],
            "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": "8496e85c20e7836b3dec97780e40f420a3ae2801",
                            "lessThan": "f4b44c7766dae2b8681f621941cabe9f14066d59",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "8496e85c20e7836b3dec97780e40f420a3ae2801",
                            "lessThan": "643d77fda08d06f863af35e80a7e517ea61d9629",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "8496e85c20e7836b3dec97780e40f420a3ae2801",
                            "lessThan": "65bd0962992abd42e77a05e68c7b40e7c73726d1",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "8496e85c20e7836b3dec97780e40f420a3ae2801",
                            "lessThan": "99ef6cc791584495987dd11b14769b450dfa5820",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "8496e85c20e7836b3dec97780e40f420a3ae2801",
                            "lessThan": "67fd41bbb0f51aa648a47f728b99e6f1fa2ccc34",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "8496e85c20e7836b3dec97780e40f420a3ae2801",
                            "lessThan": "81565e51ccaf6fff8910e997ee22e16b5e1dabc3",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "8496e85c20e7836b3dec97780e40f420a3ae2801",
                            "lessThan": "518573988a2f14f517403db2ece5ddaefba21e94",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "8496e85c20e7836b3dec97780e40f420a3ae2801",
                            "lessThan": "98b04dd0b4577894520493d96bc4623387767445",
                            "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": "3.13",
                            "status": "affected"
                        },
                        {
                            "version": "0",
                            "lessThan": "3.13",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "4.14.303",
                            "lessThanOrEqual": "4.14.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "4.19.270",
                            "lessThanOrEqual": "4.19.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "5.4.229",
                            "lessThanOrEqual": "5.4.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "5.10.163",
                            "lessThanOrEqual": "5.10.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "5.15.87",
                            "lessThanOrEqual": "5.15.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.0.18",
                            "lessThanOrEqual": "6.0.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.1.4",
                            "lessThanOrEqual": "6.1.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.2",
                            "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": "3.13",
                                    "versionEndExcluding": "4.14.303"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "3.13",
                                    "versionEndExcluding": "4.19.270"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "3.13",
                                    "versionEndExcluding": "5.4.229"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "3.13",
                                    "versionEndExcluding": "5.10.163"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "3.13",
                                    "versionEndExcluding": "5.15.87"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "3.13",
                                    "versionEndExcluding": "6.0.18"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "3.13",
                                    "versionEndExcluding": "6.1.4"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "3.13",
                                    "versionEndExcluding": "6.2"
                                }
                            ]
                        }
                    ]
                }
            ],
            "references": [
                {
                    "url": "https://git.kernel.org/stable/c/f4b44c7766dae2b8681f621941cabe9f14066d59"
                },
                {
                    "url": "https://git.kernel.org/stable/c/643d77fda08d06f863af35e80a7e517ea61d9629"
                },
                {
                    "url": "https://git.kernel.org/stable/c/65bd0962992abd42e77a05e68c7b40e7c73726d1"
                },
                {
                    "url": "https://git.kernel.org/stable/c/99ef6cc791584495987dd11b14769b450dfa5820"
                },
                {
                    "url": "https://git.kernel.org/stable/c/67fd41bbb0f51aa648a47f728b99e6f1fa2ccc34"
                },
                {
                    "url": "https://git.kernel.org/stable/c/81565e51ccaf6fff8910e997ee22e16b5e1dabc3"
                },
                {
                    "url": "https://git.kernel.org/stable/c/518573988a2f14f517403db2ece5ddaefba21e94"
                },
                {
                    "url": "https://git.kernel.org/stable/c/98b04dd0b4577894520493d96bc4623387767445"
                }
            ],
            "title": "PCI: Fix pci_device_is_present() for VFs by checking PF",
            "x_generator": {
                "engine": "bippy-1.2.0"
            }
        }
    }
}