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CVE-2023-53763

Estado: AplazadaAlta (7.8)—

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

Revert "f2fs: fix to do sanity check on extent cache correctly"

syzbot reports a f2fs bug as below:

The issue was bisected to:

commit d48a7b3a72f121655d95b5157c32c7d555e44c05 Author: Chao Yu <chao@kernel.org> Date: Mon Jan 9 03:49:20 2023 +0000

The root cause is we applied both v1 and v2 of the patch, v2 is the right fix, so it needs to revert v1 in order to fix reported issue.

v1: commit d48a7b3a72f1 ("f2fs: fix to do sanity check on extent cache correctly") https://lore.kernel.org/lkml/20230109034920.492914-1-chao@kernel.org/

v2: commit 269d11948100 ("f2fs: fix to do sanity check on extent cache correctly") https://lore.kernel.org/lkml/20230207134808.1827869-1-chao@kernel.org/

Detalles técnicos trazas, registros y código del informe original
UBSAN: array-index-out-of-bounds in fs/f2fs/f2fs.h:3275:19
index 1409 is out of range for type '__le32[923]' (aka 'unsigned int[923]')
Call Trace:
 __dump_stack lib/dump_stack.c:88 [inline]
 dump_stack_lvl+0x1e7/0x2d0 lib/dump_stack.c:106
 ubsan_epilogue lib/ubsan.c:217 [inline]
 __ubsan_handle_out_of_bounds+0x11c/0x150 lib/ubsan.c:348
 inline_data_addr fs/f2fs/f2fs.h:3275 [inline]
 __recover_inline_status fs/f2fs/inode.c:113 [inline]
 do_read_inode fs/f2fs/inode.c:480 [inline]
 f2fs_iget+0x4730/0x48b0 fs/f2fs/inode.c:604
 f2fs_fill_super+0x640e/0x80c0 fs/f2fs/super.c:4601
 mount_bdev+0x276/0x3b0 fs/super.c:1391
 legacy_get_tree+0xef/0x190 fs/fs_context.c:611
 vfs_get_tree+0x8c/0x270 fs/super.c:1519
 do_new_mount+0x28f/0xae0 fs/namespace.c:3335
 do_mount fs/namespace.c:3675 [inline]
 __do_sys_mount fs/namespace.c:3884 [inline]
 __se_sys_mount+0x2d9/0x3c0 fs/namespace.c:3861
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x41/0xc0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x63/0xcd

    f2fs: fix to do sanity check on extent cache correctly

CVSS

Probabilidad de explotación (EPSS)

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.

Vulnerabilidad de acceso local en f2fs del kernel Linux (AV:L/PR:L/UI:N) que permite lectura de datos sensibles mediante desbordamiento de índice de array, con potencial de denegación de servicio por crash.

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

Threat Intelligence ProgramFilter Network TrafficExecution PreventionApplication Isolation and SandboxingExploit ProtectionUpdate Software

Tecnologías afectadas (1)

⚠ Inferidas por IA a partir de la descripción — NVD aún no ha analizado esta CVE; no son CPE verificados.

Linux — Linux KernelAI

Referencias

JSON original (NVD)

Mostrar
{
  "id": "CVE-2023-53763",
  "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: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": "85eb8b61dd4cfc7a839a0e86287b92ca6193444e",
              "lessThan": "0d545a8e77cbd1fbad311b18952e38e0f7672ab4",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "d48a7b3a72f121655d95b5157c32c7d555e44c05",
              "lessThan": "ea35767edc78327c686e21fe1231b668f11be0db",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "d48a7b3a72f121655d95b5157c32c7d555e44c05",
              "lessThan": "bbb3cd66301ef752fae2922452660f228d69bcaf",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "d48a7b3a72f121655d95b5157c32c7d555e44c05",
              "lessThan": "958ccbbf1ce716d77c7cfa79ace50a421c1eed73",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "a3d1fd01250ffca88c11e9bd8d19be779acc7557",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "6.1.29",
              "lessThan": "6.1.53",
              "versionType": "semver"
            },
            {
              "status": "affected",
              "version": "6.2.5",
              "lessThan": "6.3",
              "versionType": "semver"
            }
          ],
          "programFiles": [
            "fs/f2fs/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": "6.3"
            },
            {
              "status": "unaffected",
              "version": "0",
              "lessThan": "6.3",
              "versionType": "semver"
            },
            {
              "status": "unaffected",
              "version": "6.1.53",
              "versionType": "semver",
              "lessThanOrEqual": "6.1.*"
            },
            {
              "status": "unaffected",
              "version": "6.4.16",
              "versionType": "semver",
              "lessThanOrEqual": "6.4.*"
            },
            {
              "status": "unaffected",
              "version": "6.5.3",
              "versionType": "semver",
              "lessThanOrEqual": "6.5.*"
            },
            {
              "status": "unaffected",
              "version": "6.6",
              "versionType": "original_commit_for_fix",
              "lessThanOrEqual": "*"
            }
          ],
          "programFiles": [
            "fs/f2fs/inode.c"
          ],
          "defaultStatus": "affected"
        }
      ]
    }
  ],
  "published": "2025-12-08T02:15:52.173",
  "references": [
    {
      "url": "https://git.kernel.org/stable/c/0d545a8e77cbd1fbad311b18952e38e0f7672ab4",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/958ccbbf1ce716d77c7cfa79ace50a421c1eed73",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/bbb3cd66301ef752fae2922452660f228d69bcaf",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/ea35767edc78327c686e21fe1231b668f11be0db",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    }
  ],
  "vulnStatus": "Deferred",
  "descriptions": [
    {
      "lang": "en",
      "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nRevert \"f2fs: fix to do sanity check on extent cache correctly\"\n\nsyzbot reports a f2fs bug as below:\n\nUBSAN: array-index-out-of-bounds in fs/f2fs/f2fs.h:3275:19\nindex 1409 is out of range for type '__le32[923]' (aka 'unsigned int[923]')\nCall Trace:\n __dump_stack lib/dump_stack.c:88 [inline]\n dump_stack_lvl+0x1e7/0x2d0 lib/dump_stack.c:106\n ubsan_epilogue lib/ubsan.c:217 [inline]\n __ubsan_handle_out_of_bounds+0x11c/0x150 lib/ubsan.c:348\n inline_data_addr fs/f2fs/f2fs.h:3275 [inline]\n __recover_inline_status fs/f2fs/inode.c:113 [inline]\n do_read_inode fs/f2fs/inode.c:480 [inline]\n f2fs_iget+0x4730/0x48b0 fs/f2fs/inode.c:604\n f2fs_fill_super+0x640e/0x80c0 fs/f2fs/super.c:4601\n mount_bdev+0x276/0x3b0 fs/super.c:1391\n legacy_get_tree+0xef/0x190 fs/fs_context.c:611\n vfs_get_tree+0x8c/0x270 fs/super.c:1519\n do_new_mount+0x28f/0xae0 fs/namespace.c:3335\n do_mount fs/namespace.c:3675 [inline]\n __do_sys_mount fs/namespace.c:3884 [inline]\n __se_sys_mount+0x2d9/0x3c0 fs/namespace.c:3861\n do_syscall_x64 arch/x86/entry/common.c:50 [inline]\n do_syscall_64+0x41/0xc0 arch/x86/entry/common.c:80\n entry_SYSCALL_64_after_hwframe+0x63/0xcd\n\nThe issue was bisected to:\n\ncommit d48a7b3a72f121655d95b5157c32c7d555e44c05\nAuthor: Chao Yu <chao@kernel.org>\nDate:   Mon Jan 9 03:49:20 2023 +0000\n\n    f2fs: fix to do sanity check on extent cache correctly\n\nThe root cause is we applied both v1 and v2 of the patch, v2 is the right\nfix, so it needs to revert v1 in order to fix reported issue.\n\nv1:\ncommit d48a7b3a72f1 (\"f2fs: fix to do sanity check on extent cache correctly\")\nhttps://lore.kernel.org/lkml/20230109034920.492914-1-chao@kernel.org/\n\nv2:\ncommit 269d11948100 (\"f2fs: fix to do sanity check on extent cache correctly\")\nhttps://lore.kernel.org/lkml/20230207134808.1827869-1-chao@kernel.org/"
    }
  ],
  "lastModified": "2026-08-04T10:19:20.440",
  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
}