{
    "dataType": "CVE_RECORD",
    "dataVersion": "5.2",
    "cveMetadata": {
        "cveId": "CVE-2026-64290",
        "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "state": "PUBLISHED",
        "assignerShortName": "Linux",
        "dateReserved": "2026-07-19T15:36:31.778Z",
        "datePublished": "2026-07-25T08:49:30.049Z",
        "dateUpdated": "2026-08-17T04:52:47.176Z"
    },
    "containers": {
        "cna": {
            "providerMetadata": {
                "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
                "shortName": "Linux",
                "dateUpdated": "2026-08-17T04:52:47.176Z"
            },
            "descriptions": [
                {
                    "lang": "en",
                    "value": "In the Linux kernel, the following vulnerability has been resolved:\n\niommufd: Break the loop on failure in iommufd_fault_fops_read()\n\nOn a copy_to_user() failure inside the inner list_for_each_entry, only the\ninner loop breaks; the outer while re-fetches the just-restored fault group\nand retries the failing copy_to_user() forever, spinning the reader at 100%\nCPU with fault->mutex held.\n\nCheck rc after the inner loop and break the outer while as well."
                }
            ],
            "affected": [
                {
                    "product": "Linux",
                    "vendor": "Linux",
                    "defaultStatus": "unaffected",
                    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
                    "programFiles": [
                        "drivers/iommu/iommufd/eventq.c"
                    ],
                    "versions": [
                        {
                            "version": "07838f7fd529c8a6de44b601d4b7057e6c8d36ed",
                            "lessThan": "a38e0714affc5c0bbb40cba5a65d6d32a5e72a71",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "07838f7fd529c8a6de44b601d4b7057e6c8d36ed",
                            "lessThan": "5539da127d03c1f6c2e2a49fdfbe331a0ccbdea8",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "07838f7fd529c8a6de44b601d4b7057e6c8d36ed",
                            "lessThan": "f66c16b175509642ee7082df57c9bf3deaebae1a",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "07838f7fd529c8a6de44b601d4b7057e6c8d36ed",
                            "lessThan": "172fc8b19825a0f5884c38f2289188284e2d45ee",
                            "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/iommu/iommufd/eventq.c"
                    ],
                    "versions": [
                        {
                            "version": "6.11",
                            "status": "affected"
                        },
                        {
                            "version": "0",
                            "lessThan": "6.11",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.12.101",
                            "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": "6.11",
                                    "versionEndExcluding": "6.12.101"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "6.11",
                                    "versionEndExcluding": "6.18.39"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "6.11",
                                    "versionEndExcluding": "7.1.4"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "6.11",
                                    "versionEndExcluding": "7.2"
                                }
                            ]
                        }
                    ]
                }
            ],
            "references": [
                {
                    "url": "https://git.kernel.org/stable/c/a38e0714affc5c0bbb40cba5a65d6d32a5e72a71"
                },
                {
                    "url": "https://git.kernel.org/stable/c/5539da127d03c1f6c2e2a49fdfbe331a0ccbdea8"
                },
                {
                    "url": "https://git.kernel.org/stable/c/f66c16b175509642ee7082df57c9bf3deaebae1a"
                },
                {
                    "url": "https://git.kernel.org/stable/c/172fc8b19825a0f5884c38f2289188284e2d45ee"
                }
            ],
            "title": "iommufd: Break the loop on failure in iommufd_fault_fops_read()",
            "x_generator": {
                "engine": "bippy-1.2.0"
            }
        }
    }
}