{
    "dataType": "CVE_RECORD",
    "dataVersion": "5.2",
    "cveMetadata": {
        "cveId": "CVE-2026-31577",
        "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "state": "PUBLISHED",
        "assignerShortName": "Linux",
        "dateReserved": "2026-03-09T15:48:24.119Z",
        "datePublished": "2026-04-24T14:42:08.879Z",
        "dateUpdated": "2026-06-14T17:42:01.611Z"
    },
    "containers": {
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            "providerMetadata": {
                "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
                "shortName": "Linux",
                "dateUpdated": "2026-06-14T17:42:01.611Z"
            },
            "descriptions": [
                {
                    "lang": "en",
                    "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnilfs2: fix NULL i_assoc_inode dereference in nilfs_mdt_save_to_shadow_map\n\nThe DAT inode's btree node cache (i_assoc_inode) is initialized lazily\nduring btree operations. However, nilfs_mdt_save_to_shadow_map()\nassumes i_assoc_inode is already initialized when copying dirty pages\nto the shadow map during GC.\n\nIf NILFS_IOCTL_CLEAN_SEGMENTS is called immediately after mount before\nany btree operation has occurred on the DAT inode, i_assoc_inode is\nNULL leading to a general protection fault.\n\nFix this by calling nilfs_attach_btree_node_cache() on the DAT inode\nin nilfs_dat_read() at mount time, ensuring i_assoc_inode is always\ninitialized before any GC operation can use it."
                }
            ],
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                    "vendor": "Linux",
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                            "versionType": "original_commit_for_fix"
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            "references": [
                {
                    "url": "https://git.kernel.org/stable/c/6637bbcfb59df5b732a79e5ab1a74886a0b93d59"
                },
                {
                    "url": "https://git.kernel.org/stable/c/837c7a59fb58f81b0db33848357f6a5d0d1250ad"
                },
                {
                    "url": "https://git.kernel.org/stable/c/7902b1df1520a0880bcda7a3704cfacd17905a83"
                },
                {
                    "url": "https://git.kernel.org/stable/c/7318e3549518ce8f14776a489d86488d80d7e2c8"
                },
                {
                    "url": "https://git.kernel.org/stable/c/449ec5fc99f45974525ba9eea16b6670c45cd363"
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                },
                {
                    "url": "https://git.kernel.org/stable/c/4a4e0328edd9e9755843787d28f16dd4165f8b48"
                }
            ],
            "title": "nilfs2: fix NULL i_assoc_inode dereference in nilfs_mdt_save_to_shadow_map",
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