{
    "dataType": "CVE_RECORD",
    "dataVersion": "5.2",
    "cveMetadata": {
        "cveId": "CVE-2025-37818",
        "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "state": "PUBLISHED",
        "assignerShortName": "Linux",
        "dateReserved": "2025-04-16T04:51:23.947Z",
        "datePublished": "2025-05-08T06:26:13.322Z",
        "dateUpdated": "2026-05-11T21:15:44.270Z"
    },
    "containers": {
        "cna": {
            "providerMetadata": {
                "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
                "shortName": "Linux",
                "dateUpdated": "2026-05-11T21:15:44.270Z"
            },
            "descriptions": [
                {
                    "lang": "en",
                    "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nLoongArch: Return NULL from huge_pte_offset() for invalid PMD\n\nLoongArch's huge_pte_offset() currently returns a pointer to a PMD slot\neven if the underlying entry points to invalid_pte_table (indicating no\nmapping). Callers like smaps_hugetlb_range() fetch this invalid entry\nvalue (the address of invalid_pte_table) via this pointer.\n\nThe generic is_swap_pte() check then incorrectly identifies this address\nas a swap entry on LoongArch, because it satisfies the \"!pte_present()\n&& !pte_none()\" conditions. This misinterpretation, combined with a\ncoincidental match by is_migration_entry() on the address bits, leads to\nkernel crashes in pfn_swap_entry_to_page().\n\nFix this at the architecture level by modifying huge_pte_offset() to\ncheck the PMD entry's content using pmd_none() before returning. If the\nentry is invalid (i.e., it points to invalid_pte_table), return NULL\ninstead of the pointer to the slot."
                }
            ],
            "affected": [
                {
                    "product": "Linux",
                    "vendor": "Linux",
                    "defaultStatus": "unaffected",
                    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
                    "programFiles": [
                        "arch/loongarch/mm/hugetlbpage.c"
                    ],
                    "versions": [
                        {
                            "version": "fa96b57c149061f71a70bd6582d995f6424fbbf4",
                            "lessThan": "34256805720993e37adf6127371a1265aea8376a",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "fa96b57c149061f71a70bd6582d995f6424fbbf4",
                            "lessThan": "2ca9380b12711afe95b3589bd82b59623b3c96b3",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "fa96b57c149061f71a70bd6582d995f6424fbbf4",
                            "lessThan": "51424fd171cee6a33f01f7c66b8eb23ac42289d4",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "fa96b57c149061f71a70bd6582d995f6424fbbf4",
                            "lessThan": "b49f085cd671addbda4802d6b9382513f7dd0f30",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "fa96b57c149061f71a70bd6582d995f6424fbbf4",
                            "lessThan": "bd51834d1cf65a2c801295d230c220aeebf87a73",
                            "status": "affected",
                            "versionType": "git"
                        }
                    ]
                },
                {
                    "product": "Linux",
                    "vendor": "Linux",
                    "defaultStatus": "affected",
                    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
                    "programFiles": [
                        "arch/loongarch/mm/hugetlbpage.c"
                    ],
                    "versions": [
                        {
                            "version": "5.19",
                            "status": "affected"
                        },
                        {
                            "version": "0",
                            "lessThan": "5.19",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.1.136",
                            "lessThanOrEqual": "6.1.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.6.89",
                            "lessThanOrEqual": "6.6.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.12.26",
                            "lessThanOrEqual": "6.12.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.14.5",
                            "lessThanOrEqual": "6.14.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.15",
                            "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": "5.19",
                                    "versionEndExcluding": "6.1.136"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "5.19",
                                    "versionEndExcluding": "6.6.89"
                                },
                                {
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                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "5.19",
                                    "versionEndExcluding": "6.12.26"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "5.19",
                                    "versionEndExcluding": "6.15"
                                }
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            ],
            "references": [
                {
                    "url": "https://git.kernel.org/stable/c/34256805720993e37adf6127371a1265aea8376a"
                },
                {
                    "url": "https://git.kernel.org/stable/c/2ca9380b12711afe95b3589bd82b59623b3c96b3"
                },
                {
                    "url": "https://git.kernel.org/stable/c/51424fd171cee6a33f01f7c66b8eb23ac42289d4"
                },
                {
                    "url": "https://git.kernel.org/stable/c/b49f085cd671addbda4802d6b9382513f7dd0f30"
                },
                {
                    "url": "https://git.kernel.org/stable/c/bd51834d1cf65a2c801295d230c220aeebf87a73"
                }
            ],
            "title": "LoongArch: Return NULL from huge_pte_offset() for invalid PMD",
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        },
        "adp": [
            {
                "title": "CVE Program Container",
                "references": [
                    {
                        "url": "https://lists.debian.org/debian-lts-announce/2025/05/msg00045.html"
                    }
                ],
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                    "shortName": "CVE",
                    "dateUpdated": "2025-11-03T19:55:50.705Z"
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}