CVE-2022-50336
Estado: AnalizadaMedia (5.5)—
In the Linux kernel, the following vulnerability has been resolved:
fs/ntfs3: Add null pointer check to attr_load_runs_vcn
Some metadata files are handled before MFT. This adds a null pointer check for some corner cases that could lead to NPD while reading these metadata files for a malformed NTFS image.
Detalles técnicos trazas, registros y código del informe original
[ 240.190827] BUG: kernel NULL pointer dereference, address: 0000000000000158 [ 240.191583] #PF: supervisor read access in kernel mode [ 240.191956] #PF: error_code(0x0000) - not-present page [ 240.192391] PGD 0 P4D 0 [ 240.192897] Oops: 0000 [#1] PREEMPT SMP KASAN NOPTI [ 240.193805] CPU: 0 PID: 242 Comm: mount Tainted: G B 5.19.0+ #17 [ 240.194477] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.14.0-0-g155821a1990b-prebuilt.qemu.org 04/01/2014 [ 240.195152] RIP: 0010:ni_find_attr+0xae/0x300 [ 240.195679] Code: c8 48 c7 45 88 c0 4e 5e 86 c7 00 f1 f1 f1 f1 c7 40 04 00 f3 f3 f3 65 48 8b 04 25 28 00 00 00 48 89 45 d0 31 c0 e8 e2 d9f [ 240.196642] RSP: 0018:ffff88800812f690 EFLAGS: 00000286 [ 240.197019] RAX: 0000000000000001 RBX: 0000000000000000 RCX: ffffffff85ef037a [ 240.197523] RDX: 0000000000000001 RSI: 0000000000000008 RDI: ffffffff88e95f60 [ 240.197877] RBP: ffff88800812f738 R08: 0000000000000001 R09: fffffbfff11d2bed [ 240.198292] R10: ffffffff88e95f67 R11: fffffbfff11d2bec R12: 0000000000000000 [ 240.198647] R13: 0000000000000080 R14: 0000000000000000 R15: 0000000000000000 [ 240.199410] FS: 00007f233c33be40(0000) GS:ffff888058200000(0000) knlGS:0000000000000000 [ 240.199895] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 240.200314] CR2: 0000000000000158 CR3: 0000000004d32000 CR4: 00000000000006f0 [ 240.200839] Call Trace: [ 240.201104] <TASK> [ 240.201502] ? ni_load_mi+0x80/0x80 [ 240.202297] ? ___slab_alloc+0x465/0x830 [ 240.202614] attr_load_runs_vcn+0x8c/0x1a0 [ 240.202886] ? __kasan_slab_alloc+0x32/0x90 [ 240.203157] ? attr_data_write_resident+0x250/0x250 [ 240.203543] mi_read+0x133/0x2c0 [ 240.203785] mi_get+0x70/0x140 [ 240.204012] ni_load_mi_ex+0xfa/0x190 [ 240.204346] ? ni_std5+0x90/0x90 [ 240.204588] ? __kasan_kmalloc+0x88/0xb0 [ 240.204859] ni_enum_attr_ex+0xf1/0x1c0 [ 240.205107] ? ni_fname_type.part.0+0xd0/0xd0 [ 240.205600] ? ntfs_load_attr_list+0xbe/0x300 [ 240.205864] ? ntfs_cmp_names_cpu+0x125/0x180 [ 240.206157] ntfs_iget5+0x56c/0x1870 [ 240.206510] ? ntfs_get_block_bmap+0x70/0x70 [ 240.206776] ? __kasan_kmalloc+0x88/0xb0 [ 240.207030] ? set_blocksize+0x95/0x150 [ 240.207545] ntfs_fill_super+0xb8f/0x1e20 [ 240.207839] ? put_ntfs+0x1d0/0x1d0 [ 240.208069] ? vsprintf+0x20/0x20 [ 240.208467] ? mutex_unlock+0x81/0xd0 [ 240.208846] ? set_blocksize+0x95/0x150 [ 240.209221] get_tree_bdev+0x232/0x370 [ 240.209804] ? put_ntfs+0x1d0/0x1d0 [ 240.210519] ntfs_fs_get_tree+0x15/0x20 [ 240.210991] vfs_get_tree+0x4c/0x130 [ 240.211455] path_mount+0x645/0xfd0 [ 240.211806] ? putname+0x80/0xa0 [ 240.212112] ? finish_automount+0x2e0/0x2e0 [ 240.212559] ? kmem_cache_free+0x110/0x390 [ 240.212906] ? putname+0x80/0xa0 [ 240.213329] do_mount+0xd6/0xf0 [ 240.213829] ? path_mount+0xfd0/0xfd0 [ 240.214246] ? __kasan_check_write+0x14/0x20 [ 240.214774] __x64_sys_mount+0xca/0x110 [ 240.215080] do_syscall_64+0x3b/0x90 [ 240.215442] entry_SYSCALL_64_after_hwframe+0x63/0xcd [ 240.215811] RIP: 0033:0x7f233b4e948a [ 240.216104] 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 [ 240.217615] RSP: 002b:00007fff02211ec8 EFLAGS: 00000202 ORIG_RAX: 00000000000000a5 [ 240.218718] RAX: ffffffffffffffda RBX: 0000561cdc35b060 RCX: 00007f233b4e948a [ 240.219556] RDX: 0000561cdc35b260 RSI: 0000561cdc35b2e0 RDI: 0000561cdc363af0 [ 240.219975] RBP: 0000000000000000 R08: 0000561cdc35b280 R09: 0000000000000020 [ 240.220403] R10: 00000000c0ed0000 R11: 0000000000000202 R12: 0000561cdc363af0 [ 240.220803] R13: 000 ---truncated---
CVSS
- Versión: 3.1
- Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
- Puntuación base: 5.5
Probabilidad de explotación (EPSS)
- Probabilidad de explotación en los próximos 30 días: 0.16%
- Percentil entre todas las CVEs puntuadas: 4
- Fecha de la puntuación: 6/10/2026
EPSS (Exploit Prediction Scoring System, de FIRST) estima la probabilidad de que una vulnerabilidad sea explotada en 30 días. Complementa a CVSS (impacto) y a CISA KEV (explotación confirmada).
Tecnologías afectadas (1)
CWE
- CWE-476
Referencias
JSON original (NVD)
Mostrar
{
"id": "CVE-2022-50336",
"cveTags": [],
"metrics": {
"cvssMetricV31": [
{
"type": "Primary",
"source": "nvd@nist.gov",
"cvssData": {
"scope": "UNCHANGED",
"version": "3.1",
"baseScore": 5.5,
"attackVector": "LOCAL",
"baseSeverity": "MEDIUM",
"vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",
"integrityImpact": "NONE",
"userInteraction": "NONE",
"attackComplexity": "LOW",
"availabilityImpact": "HIGH",
"privilegesRequired": "LOW",
"confidentialityImpact": "NONE"
},
"impactScore": 3.6,
"exploitabilityScore": 1.8
}
]
},
"affected": [
{
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"affectedData": [
{
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"product": "Linux",
"versions": [
{
"status": "affected",
"version": "4342306f0f0d5ff4315a204d315c1b51b914fca5",
"lessThan": "ea6b3598406c58c5d09b6f4328e09616c077597f",
"versionType": "git"
},
{
"status": "affected",
"version": "4342306f0f0d5ff4315a204d315c1b51b914fca5",
"lessThan": "26425414bfe5d302413b956ab2469176d4ff53aa",
"versionType": "git"
},
{
"status": "affected",
"version": "4342306f0f0d5ff4315a204d315c1b51b914fca5",
"lessThan": "1621734cd3047f7979da1d7d5c5444d583d8b0ed",
"versionType": "git"
},
{
"status": "affected",
"version": "4342306f0f0d5ff4315a204d315c1b51b914fca5",
"lessThan": "2681631c29739509eec59cc0b34e977bb04c6cf1",
"versionType": "git"
}
],
"programFiles": [
"fs/ntfs3/attrib.c"
],
"defaultStatus": "unaffected"
},
{
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"product": "Linux",
"versions": [
{
"status": "affected",
"version": "5.15"
},
{
"status": "unaffected",
"version": "0",
"lessThan": "5.15",
"versionType": "semver"
},
{
"status": "unaffected",
"version": "5.15.87",
"versionType": "semver",
"lessThanOrEqual": "5.15.*"
},
{
"status": "unaffected",
"version": "6.0.17",
"versionType": "semver",
"lessThanOrEqual": "6.0.*"
},
{
"status": "unaffected",
"version": "6.1.3",
"versionType": "semver",
"lessThanOrEqual": "6.1.*"
},
{
"status": "unaffected",
"version": "6.2",
"versionType": "original_commit_for_fix",
"lessThanOrEqual": "*"
}
],
"programFiles": [
"fs/ntfs3/attrib.c"
],
"defaultStatus": "affected"
}
]
}
],
"published": "2025-09-15T15:15:45.933",
"references": [
{
"url": "https://git.kernel.org/stable/c/1621734cd3047f7979da1d7d5c5444d583d8b0ed",
"tags": [
"Patch"
],
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
},
{
"url": "https://git.kernel.org/stable/c/26425414bfe5d302413b956ab2469176d4ff53aa",
"tags": [
"Patch"
],
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
},
{
"url": "https://git.kernel.org/stable/c/2681631c29739509eec59cc0b34e977bb04c6cf1",
"tags": [
"Patch"
],
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
},
{
"url": "https://git.kernel.org/stable/c/ea6b3598406c58c5d09b6f4328e09616c077597f",
"tags": [
"Patch"
],
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
}
],
"vulnStatus": "Analyzed",
"weaknesses": [
{
"type": "Primary",
"source": "nvd@nist.gov",
"description": [
{
"lang": "en",
"value": "CWE-476"
}
]
}
],
"descriptions": [
{
"lang": "en",
"value": "In the Linux kernel, the following vulnerability has been resolved:\n\nfs/ntfs3: Add null pointer check to attr_load_runs_vcn\n\nSome metadata files are handled before MFT. This adds a null pointer\ncheck for some corner cases that could lead to NPD while reading these\nmetadata files for a malformed NTFS image.\n\n[ 240.190827] BUG: kernel NULL pointer dereference, address: 0000000000000158\n[ 240.191583] #PF: supervisor read access in kernel mode\n[ 240.191956] #PF: error_code(0x0000) - not-present page\n[ 240.192391] PGD 0 P4D 0\n[ 240.192897] Oops: 0000 [#1] PREEMPT SMP KASAN NOPTI\n[ 240.193805] CPU: 0 PID: 242 Comm: mount Tainted: G B 5.19.0+ #17\n[ 240.194477] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.14.0-0-g155821a1990b-prebuilt.qemu.org 04/01/2014\n[ 240.195152] RIP: 0010:ni_find_attr+0xae/0x300\n[ 240.195679] Code: c8 48 c7 45 88 c0 4e 5e 86 c7 00 f1 f1 f1 f1 c7 40 04 00 f3 f3 f3 65 48 8b 04 25 28 00 00 00 48 89 45 d0 31 c0 e8 e2 d9f\n[ 240.196642] RSP: 0018:ffff88800812f690 EFLAGS: 00000286\n[ 240.197019] RAX: 0000000000000001 RBX: 0000000000000000 RCX: ffffffff85ef037a\n[ 240.197523] RDX: 0000000000000001 RSI: 0000000000000008 RDI: ffffffff88e95f60\n[ 240.197877] RBP: ffff88800812f738 R08: 0000000000000001 R09: fffffbfff11d2bed\n[ 240.198292] R10: ffffffff88e95f67 R11: fffffbfff11d2bec R12: 0000000000000000\n[ 240.198647] R13: 0000000000000080 R14: 0000000000000000 R15: 0000000000000000\n[ 240.199410] FS: 00007f233c33be40(0000) GS:ffff888058200000(0000) knlGS:0000000000000000\n[ 240.199895] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033\n[ 240.200314] CR2: 0000000000000158 CR3: 0000000004d32000 CR4: 00000000000006f0\n[ 240.200839] Call Trace:\n[ 240.201104] <TASK>\n[ 240.201502] ? ni_load_mi+0x80/0x80\n[ 240.202297] ? ___slab_alloc+0x465/0x830\n[ 240.202614] attr_load_runs_vcn+0x8c/0x1a0\n[ 240.202886] ? __kasan_slab_alloc+0x32/0x90\n[ 240.203157] ? attr_data_write_resident+0x250/0x250\n[ 240.203543] mi_read+0x133/0x2c0\n[ 240.203785] mi_get+0x70/0x140\n[ 240.204012] ni_load_mi_ex+0xfa/0x190\n[ 240.204346] ? ni_std5+0x90/0x90\n[ 240.204588] ? __kasan_kmalloc+0x88/0xb0\n[ 240.204859] ni_enum_attr_ex+0xf1/0x1c0\n[ 240.205107] ? ni_fname_type.part.0+0xd0/0xd0\n[ 240.205600] ? ntfs_load_attr_list+0xbe/0x300\n[ 240.205864] ? ntfs_cmp_names_cpu+0x125/0x180\n[ 240.206157] ntfs_iget5+0x56c/0x1870\n[ 240.206510] ? ntfs_get_block_bmap+0x70/0x70\n[ 240.206776] ? __kasan_kmalloc+0x88/0xb0\n[ 240.207030] ? set_blocksize+0x95/0x150\n[ 240.207545] ntfs_fill_super+0xb8f/0x1e20\n[ 240.207839] ? put_ntfs+0x1d0/0x1d0\n[ 240.208069] ? vsprintf+0x20/0x20\n[ 240.208467] ? mutex_unlock+0x81/0xd0\n[ 240.208846] ? set_blocksize+0x95/0x150\n[ 240.209221] get_tree_bdev+0x232/0x370\n[ 240.209804] ? put_ntfs+0x1d0/0x1d0\n[ 240.210519] ntfs_fs_get_tree+0x15/0x20\n[ 240.210991] vfs_get_tree+0x4c/0x130\n[ 240.211455] path_mount+0x645/0xfd0\n[ 240.211806] ? putname+0x80/0xa0\n[ 240.212112] ? finish_automount+0x2e0/0x2e0\n[ 240.212559] ? kmem_cache_free+0x110/0x390\n[ 240.212906] ? putname+0x80/0xa0\n[ 240.213329] do_mount+0xd6/0xf0\n[ 240.213829] ? path_mount+0xfd0/0xfd0\n[ 240.214246] ? __kasan_check_write+0x14/0x20\n[ 240.214774] __x64_sys_mount+0xca/0x110\n[ 240.215080] do_syscall_64+0x3b/0x90\n[ 240.215442] entry_SYSCALL_64_after_hwframe+0x63/0xcd\n[ 240.215811] RIP: 0033:0x7f233b4e948a\n[ 240.216104] 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[ 240.217615] RSP: 002b:00007fff02211ec8 EFLAGS: 00000202 ORIG_RAX: 00000000000000a5\n[ 240.218718] RAX: ffffffffffffffda RBX: 0000561cdc35b060 RCX: 00007f233b4e948a\n[ 240.219556] RDX: 0000561cdc35b260 RSI: 0000561cdc35b2e0 RDI: 0000561cdc363af0\n[ 240.219975] RBP: 0000000000000000 R08: 0000561cdc35b280 R09: 0000000000000020\n[ 240.220403] R10: 00000000c0ed0000 R11: 0000000000000202 R12: 0000561cdc363af0\n[ 240.220803] R13: 000\n---truncated---"
}
],
"lastModified": "2026-08-15T13:17:32.093",
"configurations": [
{
"nodes": [
{
"negate": false,
"cpeMatch": [
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"vulnerable": true,
"matchCriteriaId": "AF34DC7D-4D5D-4D9C-B1B4-FAE010E910F2",
"versionEndExcluding": "5.15.87",
"versionStartIncluding": "5.15"
},
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"vulnerable": true,
"matchCriteriaId": "05B2AE8A-556C-47C1-9119-DBAC5EB60947",
"versionEndExcluding": "6.0.17",
"versionStartIncluding": "5.16"
},
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"vulnerable": true,
"matchCriteriaId": "70594F60-3413-4969-AFD7-965266760EA6",
"versionEndExcluding": "6.1.3",
"versionStartIncluding": "6.1"
}
],
"operator": "OR"
}
]
}
],
"sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
}