CVE-2022-50507

Estado: ModificadaAlta (7.8)—

In the Linux kernel, the following vulnerability has been resolved:

fs/ntfs3: Validate data run offset

This adds sanity checks for data run offset. We should make sure data run offset is legit before trying to unpack them, otherwise we may encounter use-after-free or some unexpected memory access behaviors.

Detalles técnicos trazas, registros y código del informe original

[   82.940342] BUG: KASAN: use-after-free in run_unpack+0x2e3/0x570
[   82.941180] Read of size 1 at addr ffff888008a8487f by task mount/240
[   82.941670]
[   82.942069] CPU: 0 PID: 240 Comm: mount Not tainted 5.19.0+ #15
[   82.942482] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.14.0-0-g155821a1990b-prebuilt.qemu.org 04/01/2014
[   82.943720] Call Trace:
[   82.944204]  <TASK>
[   82.944471]  dump_stack_lvl+0x49/0x63
[   82.944908]  print_report.cold+0xf5/0x67b
[   82.945141]  ? __wait_on_bit+0x106/0x120
[   82.945750]  ? run_unpack+0x2e3/0x570
[   82.946626]  kasan_report+0xa7/0x120
[   82.947046]  ? run_unpack+0x2e3/0x570
[   82.947280]  __asan_load1+0x51/0x60
[   82.947483]  run_unpack+0x2e3/0x570
[   82.947709]  ? memcpy+0x4e/0x70
[   82.947927]  ? run_pack+0x7a0/0x7a0
[   82.948158]  run_unpack_ex+0xad/0x3f0
[   82.948399]  ? mi_enum_attr+0x14a/0x200
[   82.948717]  ? run_unpack+0x570/0x570
[   82.949072]  ? ni_enum_attr_ex+0x1b2/0x1c0
[   82.949332]  ? ni_fname_type.part.0+0xd0/0xd0
[   82.949611]  ? mi_read+0x262/0x2c0
[   82.949970]  ? ntfs_cmp_names_cpu+0x125/0x180
[   82.950249]  ntfs_iget5+0x632/0x1870
[   82.950621]  ? ntfs_get_block_bmap+0x70/0x70
[   82.951192]  ? evict+0x223/0x280
[   82.951525]  ? iput.part.0+0x286/0x320
[   82.951969]  ntfs_fill_super+0x1321/0x1e20
[   82.952436]  ? put_ntfs+0x1d0/0x1d0
[   82.952822]  ? vsprintf+0x20/0x20
[   82.953188]  ? mutex_unlock+0x81/0xd0
[   82.953379]  ? set_blocksize+0x95/0x150
[   82.954001]  get_tree_bdev+0x232/0x370
[   82.954438]  ? put_ntfs+0x1d0/0x1d0
[   82.954700]  ntfs_fs_get_tree+0x15/0x20
[   82.955049]  vfs_get_tree+0x4c/0x130
[   82.955292]  path_mount+0x645/0xfd0
[   82.955615]  ? putname+0x80/0xa0
[   82.955955]  ? finish_automount+0x2e0/0x2e0
[   82.956310]  ? kmem_cache_free+0x110/0x390
[   82.956723]  ? putname+0x80/0xa0
[   82.957023]  do_mount+0xd6/0xf0
[   82.957411]  ? path_mount+0xfd0/0xfd0
[   82.957638]  ? __kasan_check_write+0x14/0x20
[   82.957948]  __x64_sys_mount+0xca/0x110
[   82.958310]  do_syscall_64+0x3b/0x90
[   82.958719]  entry_SYSCALL_64_after_hwframe+0x63/0xcd
[   82.959341] RIP: 0033:0x7fd0d1ce948a
[   82.960193] 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
[   82.961532] RSP: 002b:00007ffe59ff69a8 EFLAGS: 00000202 ORIG_RAX: 00000000000000a5
[   82.962527] RAX: ffffffffffffffda RBX: 0000564dcc107060 RCX: 00007fd0d1ce948a
[   82.963266] RDX: 0000564dcc107260 RSI: 0000564dcc1072e0 RDI: 0000564dcc10fce0
[   82.963686] RBP: 0000000000000000 R08: 0000564dcc107280 R09: 0000000000000020
[   82.964272] R10: 00000000c0ed0000 R11: 0000000000000202 R12: 0000564dcc10fce0
[   82.964785] R13: 0000564dcc107260 R14: 0000000000000000 R15: 00000000ffffffff

CVSS

Versión: 3.1
Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Puntuación base: 7.8

Probabilidad de explotación (EPSS)

Probabilidad de explotación en los próximos 30 días: 0.16%
Percentil entre todas las CVEs puntuadas: 5
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).

🎯 Técnicas ATT&CK

Cómo se explota esta vulnerabilidad y qué consigue el atacante, en el lenguaje de MITRE ATT&CK.

ExplotaciónT1068 Exploitation for Privilege Escalationprivilege escalation85 %
Impacto principalT1059 Command and Scripting Interpreterexecution75 %
Impacto secundarioT1499.004 Application or System Exploitationimpact65 %

Vulnerabilidad de Use-After-Free (CWE-416) en driver NTFS local que requiere PR:L. Permite ejecución de código arbitrario o denegación de servicio mediante montaje de imagen NTFS manipulada.

Inferido por nuestro agente de análisis a partir de la descripción oficial, el vector CVSS y la CWE, y comprobado por un supervisor. Puede contener errores.

🛡️ Mitigaciones ATT&CK que cubren estas técnicas

Execution Prevention Threat Intelligence Program Restrict Web-Based Content Privileged Account Management Limit Software Installation Filter Network Traffic

Tecnologías afectadas (1)

Linux — Linux Kernel

CWE

CWE-416

Referencias

JSON original (NVD)

Mostrar

{
  "id": "CVE-2022-50507",
  "cveTags": [],
  "metrics": {
    "cvssMetricV31": [
      {
        "type": "Secondary",
        "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "cvssData": {
          "scope": "UNCHANGED",
          "version": "3.1",
          "baseScore": 7.8,
          "attackVector": "LOCAL",
          "baseSeverity": "HIGH",
          "vectorString": "CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H",
          "integrityImpact": "HIGH",
          "userInteraction": "REQUIRED",
          "attackComplexity": "LOW",
          "availabilityImpact": "HIGH",
          "privilegesRequired": "NONE",
          "confidentialityImpact": "HIGH"
        },
        "impactScore": 5.9,
        "exploitabilityScore": 1.8
      },
      {
        "type": "Primary",
        "source": "nvd@nist.gov",
        "cvssData": {
          "scope": "UNCHANGED",
          "version": "3.1",
          "baseScore": 7.8,
          "attackVector": "LOCAL",
          "baseSeverity": "HIGH",
          "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
          "integrityImpact": "HIGH",
          "userInteraction": "NONE",
          "attackComplexity": "LOW",
          "availabilityImpact": "HIGH",
          "privilegesRequired": "LOW",
          "confidentialityImpact": "HIGH"
        },
        "impactScore": 5.9,
        "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": "82cae269cfa953032fbb8980a7d554d60fb00b17",
              "lessThan": "de5e0955248ff90a2ae91e7f5c108392b52152d0",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "82cae269cfa953032fbb8980a7d554d60fb00b17",
              "lessThan": "e0455361d3068066a91fe18282b751925d7b5ee7",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "82cae269cfa953032fbb8980a7d554d60fb00b17",
              "lessThan": "9173b89c16a603d73c434b695fe2a7a13491300f",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "82cae269cfa953032fbb8980a7d554d60fb00b17",
              "lessThan": "6db620863f8528ed9a9aa5ad323b26554a17881d",
              "versionType": "git"
            }
          ],
          "programFiles": [
            "fs/ntfs3/attrib.c",
            "fs/ntfs3/attrlist.c",
            "fs/ntfs3/frecord.c",
            "fs/ntfs3/fslog.c",
            "fs/ntfs3/inode.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",
            "fs/ntfs3/attrlist.c",
            "fs/ntfs3/frecord.c",
            "fs/ntfs3/fslog.c",
            "fs/ntfs3/inode.c"
          ],
          "defaultStatus": "affected"
        }
      ]
    }
  ],
  "published": "2025-10-04T16:15:47.960",
  "references": [
    {
      "url": "https://git.kernel.org/stable/c/6db620863f8528ed9a9aa5ad323b26554a17881d",
      "tags": [
        "Patch"
      ],
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/9173b89c16a603d73c434b695fe2a7a13491300f",
      "tags": [
        "Patch"
      ],
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/de5e0955248ff90a2ae91e7f5c108392b52152d0",
      "tags": [
        "Patch"
      ],
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/e0455361d3068066a91fe18282b751925d7b5ee7",
      "tags": [
        "Patch"
      ],
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    }
  ],
  "vulnStatus": "Modified",
  "weaknesses": [
    {
      "type": "Primary",
      "source": "nvd@nist.gov",
      "description": [
        {
          "lang": "en",
          "value": "CWE-416"
        }
      ]
    }
  ],
  "descriptions": [
    {
      "lang": "en",
      "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nfs/ntfs3: Validate data run offset\n\nThis adds sanity checks for data run offset. We should make sure data\nrun offset is legit before trying to unpack them, otherwise we may\nencounter use-after-free or some unexpected memory access behaviors.\n\n[   82.940342] BUG: KASAN: use-after-free in run_unpack+0x2e3/0x570\n[   82.941180] Read of size 1 at addr ffff888008a8487f by task mount/240\n[   82.941670]\n[   82.942069] CPU: 0 PID: 240 Comm: mount Not tainted 5.19.0+ #15\n[   82.942482] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.14.0-0-g155821a1990b-prebuilt.qemu.org 04/01/2014\n[   82.943720] Call Trace:\n[   82.944204]  <TASK>\n[   82.944471]  dump_stack_lvl+0x49/0x63\n[   82.944908]  print_report.cold+0xf5/0x67b\n[   82.945141]  ? __wait_on_bit+0x106/0x120\n[   82.945750]  ? run_unpack+0x2e3/0x570\n[   82.946626]  kasan_report+0xa7/0x120\n[   82.947046]  ? run_unpack+0x2e3/0x570\n[   82.947280]  __asan_load1+0x51/0x60\n[   82.947483]  run_unpack+0x2e3/0x570\n[   82.947709]  ? memcpy+0x4e/0x70\n[   82.947927]  ? run_pack+0x7a0/0x7a0\n[   82.948158]  run_unpack_ex+0xad/0x3f0\n[   82.948399]  ? mi_enum_attr+0x14a/0x200\n[   82.948717]  ? run_unpack+0x570/0x570\n[   82.949072]  ? ni_enum_attr_ex+0x1b2/0x1c0\n[   82.949332]  ? ni_fname_type.part.0+0xd0/0xd0\n[   82.949611]  ? mi_read+0x262/0x2c0\n[   82.949970]  ? ntfs_cmp_names_cpu+0x125/0x180\n[   82.950249]  ntfs_iget5+0x632/0x1870\n[   82.950621]  ? ntfs_get_block_bmap+0x70/0x70\n[   82.951192]  ? evict+0x223/0x280\n[   82.951525]  ? iput.part.0+0x286/0x320\n[   82.951969]  ntfs_fill_super+0x1321/0x1e20\n[   82.952436]  ? put_ntfs+0x1d0/0x1d0\n[   82.952822]  ? vsprintf+0x20/0x20\n[   82.953188]  ? mutex_unlock+0x81/0xd0\n[   82.953379]  ? set_blocksize+0x95/0x150\n[   82.954001]  get_tree_bdev+0x232/0x370\n[   82.954438]  ? put_ntfs+0x1d0/0x1d0\n[   82.954700]  ntfs_fs_get_tree+0x15/0x20\n[   82.955049]  vfs_get_tree+0x4c/0x130\n[   82.955292]  path_mount+0x645/0xfd0\n[   82.955615]  ? putname+0x80/0xa0\n[   82.955955]  ? finish_automount+0x2e0/0x2e0\n[   82.956310]  ? kmem_cache_free+0x110/0x390\n[   82.956723]  ? putname+0x80/0xa0\n[   82.957023]  do_mount+0xd6/0xf0\n[   82.957411]  ? path_mount+0xfd0/0xfd0\n[   82.957638]  ? __kasan_check_write+0x14/0x20\n[   82.957948]  __x64_sys_mount+0xca/0x110\n[   82.958310]  do_syscall_64+0x3b/0x90\n[   82.958719]  entry_SYSCALL_64_after_hwframe+0x63/0xcd\n[   82.959341] RIP: 0033:0x7fd0d1ce948a\n[   82.960193] 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[   82.961532] RSP: 002b:00007ffe59ff69a8 EFLAGS: 00000202 ORIG_RAX: 00000000000000a5\n[   82.962527] RAX: ffffffffffffffda RBX: 0000564dcc107060 RCX: 00007fd0d1ce948a\n[   82.963266] RDX: 0000564dcc107260 RSI: 0000564dcc1072e0 RDI: 0000564dcc10fce0\n[   82.963686] RBP: 0000000000000000 R08: 0000564dcc107280 R09: 0000000000000020\n[   82.964272] R10: 00000000c0ed0000 R11: 0000000000000202 R12: 0000564dcc10fce0\n[   82.964785] R13: 0000564dcc107260 R14: 0000000000000000 R15: 00000000ffffffff"
    }
  ],
  "lastModified": "2026-08-15T13:17:38.333",
  "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"
}