{
    "dataType": "CVE_RECORD",
    "dataVersion": "5.2",
    "cveMetadata": {
        "cveId": "CVE-2022-50737",
        "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "state": "PUBLISHED",
        "assignerShortName": "Linux",
        "dateReserved": "2025-12-24T13:02:21.542Z",
        "datePublished": "2025-12-24T13:05:36.025Z",
        "dateUpdated": "2026-08-05T08:59:33.688Z"
    },
    "containers": {
        "cna": {
            "providerMetadata": {
                "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
                "shortName": "Linux",
                "dateUpdated": "2026-08-05T08:59:33.688Z"
            },
            "descriptions": [
                {
                    "lang": "en",
                    "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nfs/ntfs3: Validate index root when initialize NTFS security\n\nThis enhances the sanity check for $SDH and $SII while initializing NTFS\nsecurity, guarantees these index root are legit.\n\n[  162.459513] BUG: KASAN: use-after-free in hdr_find_e.isra.0+0x10c/0x320\n[  162.460176] Read of size 2 at addr ffff8880037bca99 by task mount/243\n[  162.460851]\n[  162.461252] CPU: 0 PID: 243 Comm: mount Not tainted 6.0.0-rc7 #42\n[  162.461744] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.14.0-0-g155821a1990b-prebuilt.qemu.org 04/01/2014\n[  162.462609] Call Trace:\n[  162.462954]  <TASK>\n[  162.463276]  dump_stack_lvl+0x49/0x63\n[  162.463822]  print_report.cold+0xf5/0x689\n[  162.464608]  ? unwind_get_return_address+0x3a/0x60\n[  162.465766]  ? hdr_find_e.isra.0+0x10c/0x320\n[  162.466975]  kasan_report+0xa7/0x130\n[  162.467506]  ? _raw_spin_lock_irq+0xc0/0xf0\n[  162.467998]  ? hdr_find_e.isra.0+0x10c/0x320\n[  162.468536]  __asan_load2+0x68/0x90\n[  162.468923]  hdr_find_e.isra.0+0x10c/0x320\n[  162.469282]  ? cmp_uints+0xe0/0xe0\n[  162.469557]  ? cmp_sdh+0x90/0x90\n[  162.469864]  ? ni_find_attr+0x214/0x300\n[  162.470217]  ? ni_load_mi+0x80/0x80\n[  162.470479]  ? entry_SYSCALL_64_after_hwframe+0x63/0xcd\n[  162.470931]  ? ntfs_bread_run+0x190/0x190\n[  162.471307]  ? indx_get_root+0xe4/0x190\n[  162.471556]  ? indx_get_root+0x140/0x190\n[  162.471833]  ? indx_init+0x1e0/0x1e0\n[  162.472069]  ? fnd_clear+0x115/0x140\n[  162.472363]  ? _raw_spin_lock_irqsave+0x100/0x100\n[  162.472731]  indx_find+0x184/0x470\n[  162.473461]  ? sysvec_apic_timer_interrupt+0x57/0xc0\n[  162.474429]  ? indx_find_buffer+0x2d0/0x2d0\n[  162.474704]  ? do_syscall_64+0x3b/0x90\n[  162.474962]  dir_search_u+0x196/0x2f0\n[  162.475381]  ? ntfs_nls_to_utf16+0x450/0x450\n[  162.475661]  ? ntfs_security_init+0x3d6/0x440\n[  162.475906]  ? is_sd_valid+0x180/0x180\n[  162.476191]  ntfs_extend_init+0x13f/0x2c0\n[  162.476496]  ? ntfs_fix_post_read+0x130/0x130\n[  162.476861]  ? iput.part.0+0x286/0x320\n[  162.477325]  ntfs_fill_super+0x11e0/0x1b50\n[  162.477709]  ? put_ntfs+0x1d0/0x1d0\n[  162.477970]  ? vsprintf+0x20/0x20\n[  162.478258]  ? set_blocksize+0x95/0x150\n[  162.478538]  get_tree_bdev+0x232/0x370\n[  162.478789]  ? put_ntfs+0x1d0/0x1d0\n[  162.479038]  ntfs_fs_get_tree+0x15/0x20\n[  162.479374]  vfs_get_tree+0x4c/0x130\n[  162.479729]  path_mount+0x654/0xfe0\n[  162.480124]  ? putname+0x80/0xa0\n[  162.480484]  ? finish_automount+0x2e0/0x2e0\n[  162.480894]  ? putname+0x80/0xa0\n[  162.481467]  ? kmem_cache_free+0x1c4/0x440\n[  162.482280]  ? putname+0x80/0xa0\n[  162.482714]  do_mount+0xd6/0xf0\n[  162.483264]  ? path_mount+0xfe0/0xfe0\n[  162.484782]  ? __kasan_check_write+0x14/0x20\n[  162.485593]  __x64_sys_mount+0xca/0x110\n[  162.486024]  do_syscall_64+0x3b/0x90\n[  162.486543]  entry_SYSCALL_64_after_hwframe+0x63/0xcd\n[  162.487141] RIP: 0033:0x7f9d374e948a\n[  162.488324] Code: 48 8b 0d 11 fa 2a 00 f7 d8 64 89 01 48 83 c8 ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00 49 89 ca b8 a5 00 00 008\n[  162.489728] RSP: 002b:00007ffe30e73d18 EFLAGS: 00000206 ORIG_RAX: 00000000000000a5\n[  162.490971] RAX: ffffffffffffffda RBX: 0000561cdb43a060 RCX: 00007f9d374e948a\n[  162.491669] RDX: 0000561cdb43a260 RSI: 0000561cdb43a2e0 RDI: 0000561cdb442af0\n[  162.492050] RBP: 0000000000000000 R08: 0000561cdb43a280 R09: 0000000000000020\n[  162.492459] R10: 00000000c0ed0000 R11: 0000000000000206 R12: 0000561cdb442af0\n[  162.493183] R13: 0000561cdb43a260 R14: 0000000000000000 R15: 00000000ffffffff\n[  162.493644]  </TASK>\n[  162.493908]\n[  162.494214] The buggy address belongs to the physical page:\n[  162.494761] page:000000003e38a3d5 refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x37bc\n[  162.496064] flags: 0xfffffc0000000(node=0|zone=1|lastcpupid=0x1fffff)\n[  162.497278] raw: 000fffffc0000000 ffffea00000df1c8 ffffea00000df008 0000000000000000\n[  162.498928] raw: 0000000000000000 0000000000240000 0\n---truncated---"
                }
            ],
            "metrics": [
                {
                    "cvssV3_1": {
                        "version": "3.1",
                        "vectorString": "CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H",
                        "baseScore": 7.8,
                        "baseSeverity": "HIGH"
                    },
                    "scenarios": [
                        {
                            "lang": "en",
                            "value": "AV:L - The bug is reached only by presenting a crafted NTFS volume to in-kernel ntfs3 so mount runs ntfs_fill_super→ntfs_security_init (and related index walks into hdr_find_e); this is a local block-device, loop, or USB/image path with no network protocol handler.\nAC:L - An attacker-controlled INDEX_ROOT with undersized resident data or oversized ihdr.used deterministically bypasses the missing resident_data_ex/used-vs-data_size checks and drives hdr_find_e into out-of-bounds/UAF reads with no race or uncontrollable precondition.\nPR:N - The attacker needs no account on the target—the payload is solely a malicious NTFS image (USB stick, disk image, or media handed to udisks2/automount on desktops, kiosks, Android, or automotive systems).\nUI:R - Someone must mount the volume or insert media into a system that automounts it; ntfs3 is FS_REQUIRES_DEV without FS_USERNS_MOUNT, so an unprivileged userns cannot mount it alone.\nS:U - The use-after-free/out-of-bounds accesses occur in host kernel memory within the same security authority as the mounting kernel; no VM, IOMMU, or sandbox boundary is crossed.\nC:H - KASAN documents a use-after-free read in hdr_find_e while walking attacker-shaped index roots past the resident attribute into freed pages, enabling arbitrary kernel memory disclosure per UAF/OOB-read guidance.\nI:H - The same UAF/memory-corruption of index-walk state during mount can be leveraged for heap reuse and write primitives (including later security-index insert paths on a successful mount), supporting control-flow hijack.\nA:H - The fix commit's KASAN report shows a use-after-free fault in hdr_find_e during mount that oopses/panics the kernel, fully denying availability."
                        }
                    ]
                }
            ],
            "affected": [
                {
                    "product": "Linux",
                    "vendor": "Linux",
                    "defaultStatus": "unaffected",
                    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
                    "programFiles": [
                        "fs/ntfs3/fsntfs.c"
                    ],
                    "versions": [
                        {
                            "version": "82cae269cfa953032fbb8980a7d554d60fb00b17",
                            "lessThan": "d7ce7bb6881aae186e50f57eea935cff8d504751",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "82cae269cfa953032fbb8980a7d554d60fb00b17",
                            "lessThan": "24ee53c6bce15500db22f2a7aee9dd830e806c90",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "82cae269cfa953032fbb8980a7d554d60fb00b17",
                            "lessThan": "d6379ce242960a8e9ecd6ff76f476d9336c21f16",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "82cae269cfa953032fbb8980a7d554d60fb00b17",
                            "lessThan": "bfcdbae0523bd95eb75a739ffb6221a37109881e",
                            "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/ntfs3/fsntfs.c"
                    ],
                    "versions": [
                        {
                            "version": "5.15",
                            "status": "affected"
                        },
                        {
                            "version": "0",
                            "lessThan": "5.15",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "5.15.87",
                            "lessThanOrEqual": "5.15.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.0.17",
                            "lessThanOrEqual": "6.0.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.1.3",
                            "lessThanOrEqual": "6.1.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.2",
                            "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": "5.15",
                                    "versionEndExcluding": "5.15.87"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "5.15",
                                    "versionEndExcluding": "6.0.17"
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                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "5.15",
                                    "versionEndExcluding": "6.1.3"
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                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "5.15",
                                    "versionEndExcluding": "6.2"
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            "references": [
                {
                    "url": "https://git.kernel.org/stable/c/d7ce7bb6881aae186e50f57eea935cff8d504751"
                },
                {
                    "url": "https://git.kernel.org/stable/c/24ee53c6bce15500db22f2a7aee9dd830e806c90"
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                    "url": "https://git.kernel.org/stable/c/d6379ce242960a8e9ecd6ff76f476d9336c21f16"
                },
                {
                    "url": "https://git.kernel.org/stable/c/bfcdbae0523bd95eb75a739ffb6221a37109881e"
                }
            ],
            "title": "fs/ntfs3: Validate index root when initialize NTFS security",
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                "engine": "bippy-1.2.0"
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}