{
    "dataType": "CVE_RECORD",
    "dataVersion": "5.1",
    "cveMetadata": {
        "cveId": "CVE-2021-47335",
        "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "state": "PUBLISHED",
        "assignerShortName": "Linux",
        "dateReserved": "2024-05-21T14:28:16.977Z",
        "datePublished": "2024-05-21T14:35:45.093Z",
        "dateUpdated": "2024-08-04T05:32:08.535Z"
    },
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                "shortName": "Linux",
                "dateUpdated": "2024-05-29T05:06:10.934Z"
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            "descriptions": [
                {
                    "lang": "en",
                    "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nf2fs: fix to avoid racing on fsync_entry_slab by multi filesystem instances\n\nAs syzbot reported, there is an use-after-free issue during f2fs recovery:\n\nUse-after-free write at 0xffff88823bc16040 (in kfence-#10):\n kmem_cache_destroy+0x1f/0x120 mm/slab_common.c:486\n f2fs_recover_fsync_data+0x75b0/0x8380 fs/f2fs/recovery.c:869\n f2fs_fill_super+0x9393/0xa420 fs/f2fs/super.c:3945\n mount_bdev+0x26c/0x3a0 fs/super.c:1367\n legacy_get_tree+0xea/0x180 fs/fs_context.c:592\n vfs_get_tree+0x86/0x270 fs/super.c:1497\n do_new_mount fs/namespace.c:2905 [inline]\n path_mount+0x196f/0x2be0 fs/namespace.c:3235\n do_mount fs/namespace.c:3248 [inline]\n __do_sys_mount fs/namespace.c:3456 [inline]\n __se_sys_mount+0x2f9/0x3b0 fs/namespace.c:3433\n do_syscall_64+0x3f/0xb0 arch/x86/entry/common.c:47\n entry_SYSCALL_64_after_hwframe+0x44/0xae\n\nThe root cause is multi f2fs filesystem instances can race on accessing\nglobal fsync_entry_slab pointer, result in use-after-free issue of slab\ncache, fixes to init/destroy this slab cache only once during module\ninit/destroy procedure to avoid this issue."
                }
            ],
            "affected": [
                {
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                    "vendor": "Linux",
                    "defaultStatus": "unaffected",
                    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
                    "programFiles": [
                        "fs/f2fs/f2fs.h",
                        "fs/f2fs/recovery.c",
                        "fs/f2fs/super.c"
                    ],
                    "versions": [
                        {
                            "version": "1da177e4c3f4",
                            "lessThan": "86786603014e",
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                    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
                    "programFiles": [
                        "fs/f2fs/f2fs.h",
                        "fs/f2fs/recovery.c",
                        "fs/f2fs/super.c"
                    ],
                    "versions": [
                        {
                            "version": "5.10.51",
                            "lessThanOrEqual": "5.10.*",
                            "status": "unaffected",
                            "versionType": "custom"
                        },
                        {
                            "version": "5.12.18",
                            "lessThanOrEqual": "5.12.*",
                            "status": "unaffected",
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                        {
                            "version": "5.13.3",
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                            "status": "unaffected",
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                        {
                            "version": "5.14",
                            "lessThanOrEqual": "*",
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                            "versionType": "original_commit_for_fix"
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                    "url": "https://git.kernel.org/stable/c/86786603014e0a22d0d6af8e80ae4b8687927048"
                },
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                },
                {
                    "url": "https://git.kernel.org/stable/c/e472b276a0d2180808009be38105e12754432e2a"
                },
                {
                    "url": "https://git.kernel.org/stable/c/cad83c968c2ebe97905f900326988ed37146c347"
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            ],
            "title": "f2fs: fix to avoid racing on fsync_entry_slab by multi filesystem instances",
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