{
    "dataType": "CVE_RECORD",
    "dataVersion": "5.2",
    "cveMetadata": {
        "cveId": "CVE-2026-64474",
        "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "state": "PUBLISHED",
        "assignerShortName": "Linux",
        "dateReserved": "2026-07-19T15:36:31.790Z",
        "datePublished": "2026-07-25T08:51:37.405Z",
        "dateUpdated": "2026-08-17T04:56:20.392Z"
    },
    "containers": {
        "cna": {
            "providerMetadata": {
                "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
                "shortName": "Linux",
                "dateUpdated": "2026-08-17T04:56:20.392Z"
            },
            "descriptions": [
                {
                    "lang": "en",
                    "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nvfio: prevent infinite loop in vfio_mig_get_next_state() on blocked arc\n\nvfio_mig_get_next_state() walks vfio_from_fsm_table[] one step at a time,\nlooping to skip optional states the device does not support until\n*next_fsm is supported. A blocked transition is encoded as\nVFIO_DEVICE_STATE_ERROR, which the trailing return reports as -EINVAL.\n\nThe skip loop does not account for the ERROR sentinel.\nstate_flags_table[ERROR] is ~0U and vfio_from_fsm_table[ERROR][*] is\nERROR, so once *next_fsm becomes ERROR the loop condition stays true and\n*next_fsm never changes. The blocked arcs STOP_COPY -> PRE_COPY and\nSTOP_COPY -> PRE_COPY_P2P map to ERROR yet pass the support check on a\nprecopy-capable device, causing the loop to spin forever while holding\nthe driver state mutex. This can result in a soft lockup, and a panic\nwith softlockup_panic set.\n\nTerminate the skip loop on the ERROR sentinel so a blocked transition\nfalls through to the existing return and reports -EINVAL."
                }
            ],
            "affected": [
                {
                    "product": "Linux",
                    "vendor": "Linux",
                    "defaultStatus": "unaffected",
                    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
                    "programFiles": [
                        "drivers/vfio/vfio_main.c"
                    ],
                    "versions": [
                        {
                            "version": "4db52602a6074e9cc523500b8304600ff63e7b85",
                            "lessThan": "8e872c07e40d51a66dee7b280a23a460a2e1e3fa",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "4db52602a6074e9cc523500b8304600ff63e7b85",
                            "lessThan": "ed7d5599e6c398da74845767cd1e6a8370a160fc",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "4db52602a6074e9cc523500b8304600ff63e7b85",
                            "lessThan": "7f2d6b31089e48db4653df832c9a6afdde9a1c29",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "4db52602a6074e9cc523500b8304600ff63e7b85",
                            "lessThan": "a3a8afa2f6e7f0dc266d08f02be3f3054241ba47",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "4db52602a6074e9cc523500b8304600ff63e7b85",
                            "lessThan": "a26b499b757cfc8bbff1088bb1b844639e250893",
                            "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/vfio/vfio_main.c"
                    ],
                    "versions": [
                        {
                            "version": "6.2",
                            "status": "affected"
                        },
                        {
                            "version": "0",
                            "lessThan": "6.2",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.6.145",
                            "lessThanOrEqual": "6.6.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.12.96",
                            "lessThanOrEqual": "6.12.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.18.39",
                            "lessThanOrEqual": "6.18.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "7.1.4",
                            "lessThanOrEqual": "7.1.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "7.2",
                            "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": "6.2",
                                    "versionEndExcluding": "6.6.145"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "6.2",
                                    "versionEndExcluding": "6.12.96"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "6.2",
                                    "versionEndExcluding": "6.18.39"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "6.2",
                                    "versionEndExcluding": "7.1.4"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "6.2",
                                    "versionEndExcluding": "7.2"
                                }
                            ]
                        }
                    ]
                }
            ],
            "references": [
                {
                    "url": "https://git.kernel.org/stable/c/8e872c07e40d51a66dee7b280a23a460a2e1e3fa"
                },
                {
                    "url": "https://git.kernel.org/stable/c/ed7d5599e6c398da74845767cd1e6a8370a160fc"
                },
                {
                    "url": "https://git.kernel.org/stable/c/7f2d6b31089e48db4653df832c9a6afdde9a1c29"
                },
                {
                    "url": "https://git.kernel.org/stable/c/a3a8afa2f6e7f0dc266d08f02be3f3054241ba47"
                },
                {
                    "url": "https://git.kernel.org/stable/c/a26b499b757cfc8bbff1088bb1b844639e250893"
                }
            ],
            "title": "vfio: prevent infinite loop in vfio_mig_get_next_state() on blocked arc",
            "x_generator": {
                "engine": "bippy-1.2.0"
            }
        }
    }
}