{
    "dataType": "CVE_RECORD",
    "dataVersion": "5.2",
    "cveMetadata": {
        "cveId": "CVE-2022-50630",
        "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "state": "PUBLISHED",
        "assignerShortName": "Linux",
        "dateReserved": "2025-12-08T01:14:55.192Z",
        "datePublished": "2025-12-08T01:16:45.555Z",
        "dateUpdated": "2026-05-11T19:22:33.947Z"
    },
    "containers": {
        "cna": {
            "providerMetadata": {
                "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
                "shortName": "Linux",
                "dateUpdated": "2026-05-11T19:22:33.947Z"
            },
            "descriptions": [
                {
                    "lang": "en",
                    "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nmm: hugetlb: fix UAF in hugetlb_handle_userfault\n\nThe vma_lock and hugetlb_fault_mutex are dropped before handling userfault\nand reacquire them again after handle_userfault(), but reacquire the\nvma_lock could lead to UAF[1,2] due to the following race,\n\nhugetlb_fault\n  hugetlb_no_page\n    /*unlock vma_lock */\n    hugetlb_handle_userfault\n      handle_userfault\n        /* unlock mm->mmap_lock*/\n                                           vm_mmap_pgoff\n                                             do_mmap\n                                               mmap_region\n                                                 munmap_vma_range\n                                                   /* clean old vma */\n        /* lock vma_lock again  <--- UAF */\n    /* unlock vma_lock */\n\nSince the vma_lock will unlock immediately after\nhugetlb_handle_userfault(), let's drop the unneeded lock and unlock in\nhugetlb_handle_userfault() to fix the issue.\n\n[1] https://lore.kernel.org/linux-mm/000000000000d5e00a05e834962e@google.com/\n[2] https://lore.kernel.org/linux-mm/20220921014457.1668-1-liuzixian4@huawei.com/"
                }
            ],
            "affected": [
                {
                    "product": "Linux",
                    "vendor": "Linux",
                    "defaultStatus": "unaffected",
                    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
                    "programFiles": [
                        "mm/hugetlb.c"
                    ],
                    "versions": [
                        {
                            "version": "1a1aad8a9b7bd34f60cdf98cd7915f00ae892c45",
                            "lessThan": "45c33966759ea1b4040c08dacda99ef623c0ca29",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "1a1aad8a9b7bd34f60cdf98cd7915f00ae892c45",
                            "lessThan": "0db2efb3bff879566f05341d94c3de00ac95c4cc",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "1a1aad8a9b7bd34f60cdf98cd7915f00ae892c45",
                            "lessThan": "dd691973f67b2800a97db723b1ff6f07fdcf7f5a",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "1a1aad8a9b7bd34f60cdf98cd7915f00ae892c45",
                            "lessThan": "78504bcedb2f1bbfb353b4d233c24d641c4dda33",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "1a1aad8a9b7bd34f60cdf98cd7915f00ae892c45",
                            "lessThan": "958f32ce832ba781ac20e11bb2d12a9352ea28fc",
                            "status": "affected",
                            "versionType": "git"
                        }
                    ]
                },
                {
                    "product": "Linux",
                    "vendor": "Linux",
                    "defaultStatus": "affected",
                    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
                    "programFiles": [
                        "mm/hugetlb.c"
                    ],
                    "versions": [
                        {
                            "version": "4.11",
                            "status": "affected"
                        },
                        {
                            "version": "0",
                            "lessThan": "4.11",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "5.10.150",
                            "lessThanOrEqual": "5.10.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "5.15.75",
                            "lessThanOrEqual": "5.15.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "5.19.17",
                            "lessThanOrEqual": "5.19.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.0.3",
                            "lessThanOrEqual": "6.0.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.1",
                            "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": "4.11",
                                    "versionEndExcluding": "5.10.150"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "4.11",
                                    "versionEndExcluding": "5.15.75"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "4.11",
                                    "versionEndExcluding": "5.19.17"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "4.11",
                                    "versionEndExcluding": "6.0.3"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "4.11",
                                    "versionEndExcluding": "6.1"
                                }
                            ]
                        }
                    ]
                }
            ],
            "references": [
                {
                    "url": "https://git.kernel.org/stable/c/45c33966759ea1b4040c08dacda99ef623c0ca29"
                },
                {
                    "url": "https://git.kernel.org/stable/c/0db2efb3bff879566f05341d94c3de00ac95c4cc"
                },
                {
                    "url": "https://git.kernel.org/stable/c/dd691973f67b2800a97db723b1ff6f07fdcf7f5a"
                },
                {
                    "url": "https://git.kernel.org/stable/c/78504bcedb2f1bbfb353b4d233c24d641c4dda33"
                },
                {
                    "url": "https://git.kernel.org/stable/c/958f32ce832ba781ac20e11bb2d12a9352ea28fc"
                }
            ],
            "title": "mm: hugetlb: fix UAF in hugetlb_handle_userfault",
            "x_generator": {
                "engine": "bippy-1.2.0"
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    }
}