{
    "dataType": "CVE_RECORD",
    "dataVersion": "5.2",
    "cveMetadata": {
        "cveId": "CVE-2022-50334",
        "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "state": "PUBLISHED",
        "assignerShortName": "Linux",
        "dateReserved": "2025-09-15T14:18:36.816Z",
        "datePublished": "2025-09-15T14:49:48.608Z",
        "dateUpdated": "2026-05-11T19:17:26.783Z"
    },
    "containers": {
        "cna": {
            "providerMetadata": {
                "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
                "shortName": "Linux",
                "dateUpdated": "2026-05-11T19:17:26.783Z"
            },
            "descriptions": [
                {
                    "lang": "en",
                    "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nhugetlbfs: fix null-ptr-deref in hugetlbfs_parse_param()\n\nSyzkaller reports a null-ptr-deref bug as follows:\n======================================================\nKASAN: null-ptr-deref in range [0x0000000000000000-0x0000000000000007]\nRIP: 0010:hugetlbfs_parse_param+0x1dd/0x8e0 fs/hugetlbfs/inode.c:1380\n[...]\nCall Trace:\n <TASK>\n vfs_parse_fs_param fs/fs_context.c:148 [inline]\n vfs_parse_fs_param+0x1f9/0x3c0 fs/fs_context.c:129\n vfs_parse_fs_string+0xdb/0x170 fs/fs_context.c:191\n generic_parse_monolithic+0x16f/0x1f0 fs/fs_context.c:231\n do_new_mount fs/namespace.c:3036 [inline]\n path_mount+0x12de/0x1e20 fs/namespace.c:3370\n do_mount fs/namespace.c:3383 [inline]\n __do_sys_mount fs/namespace.c:3591 [inline]\n __se_sys_mount fs/namespace.c:3568 [inline]\n __x64_sys_mount+0x27f/0x300 fs/namespace.c:3568\n do_syscall_x64 arch/x86/entry/common.c:50 [inline]\n do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80\n entry_SYSCALL_64_after_hwframe+0x63/0xcd\n [...]\n </TASK>\n======================================================\n\nAccording to commit \"vfs: parse: deal with zero length string value\",\nkernel will set the param->string to null pointer in vfs_parse_fs_string()\nif fs string has zero length.\n\nYet the problem is that, hugetlbfs_parse_param() will dereference the\nparam->string, without checking whether it is a null pointer.  To be more\nspecific, if hugetlbfs_parse_param() parses an illegal mount parameter,\nsuch as \"size=,\", kernel will constructs struct fs_parameter with null\npointer in vfs_parse_fs_string(), then passes this struct fs_parameter to\nhugetlbfs_parse_param(), which triggers the above null-ptr-deref bug.\n\nThis patch solves it by adding sanity check on param->string\nin hugetlbfs_parse_param()."
                }
            ],
            "affected": [
                {
                    "product": "Linux",
                    "vendor": "Linux",
                    "defaultStatus": "unaffected",
                    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
                    "programFiles": [
                        "fs/hugetlbfs/inode.c"
                    ],
                    "versions": [
                        {
                            "version": "32021982a324dce93b4ae00c06213bf45fb319c8",
                            "lessThan": "fa71639873518e3587632ae58e25e4a96b57fa90",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "32021982a324dce93b4ae00c06213bf45fb319c8",
                            "lessThan": "dcd28191be9bbf307ba51a5b485773a55b0037c4",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "32021982a324dce93b4ae00c06213bf45fb319c8",
                            "lessThan": "9a8862820cbf1f18dca4f3b4c289d88561b3a384",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "32021982a324dce93b4ae00c06213bf45fb319c8",
                            "lessThan": "965e8f8ae0f642b5528f5a82b7bcaf15a659d5bd",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "32021982a324dce93b4ae00c06213bf45fb319c8",
                            "lessThan": "f2207145693ae5697a7b59e2add4b92f9e5b0e3c",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "32021982a324dce93b4ae00c06213bf45fb319c8",
                            "lessThan": "26215b7ee923b9251f7bb12c4e5f09dc465d35f2",
                            "status": "affected",
                            "versionType": "git"
                        }
                    ]
                },
                {
                    "product": "Linux",
                    "vendor": "Linux",
                    "defaultStatus": "affected",
                    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
                    "programFiles": [
                        "fs/hugetlbfs/inode.c"
                    ],
                    "versions": [
                        {
                            "version": "5.1",
                            "status": "affected"
                        },
                        {
                            "version": "0",
                            "lessThan": "5.1",
                            "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": "5.15.86",
                            "lessThanOrEqual": "5.15.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.0.16",
                            "lessThanOrEqual": "6.0.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.1.2",
                            "lessThanOrEqual": "6.1.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.2",
                            "lessThanOrEqual": "*",
                            "status": "unaffected",
                            "versionType": "original_commit_for_fix"
                        }
                    ]
                }
            ],
            "cpeApplicability": [
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                    "nodes": [
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                            "cpeMatch": [
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                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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                                    "versionEndExcluding": "5.4.229"
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                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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            "references": [
                {
                    "url": "https://git.kernel.org/stable/c/fa71639873518e3587632ae58e25e4a96b57fa90"
                },
                {
                    "url": "https://git.kernel.org/stable/c/dcd28191be9bbf307ba51a5b485773a55b0037c4"
                },
                {
                    "url": "https://git.kernel.org/stable/c/9a8862820cbf1f18dca4f3b4c289d88561b3a384"
                },
                {
                    "url": "https://git.kernel.org/stable/c/965e8f8ae0f642b5528f5a82b7bcaf15a659d5bd"
                },
                {
                    "url": "https://git.kernel.org/stable/c/f2207145693ae5697a7b59e2add4b92f9e5b0e3c"
                },
                {
                    "url": "https://git.kernel.org/stable/c/26215b7ee923b9251f7bb12c4e5f09dc465d35f2"
                }
            ],
            "title": "hugetlbfs: fix null-ptr-deref in hugetlbfs_parse_param()",
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