f2fs: fix to avoid out-of-bounds access in f2fs_truncate_inode_blocks()

{
  "id": "bdc903fcfe32e6cef251d26b2d354912f4308947708144e0ffce0af375ac9412",
  "url": "https://osv.dev/vulnerability/CVE-2025-37739",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "f2fs: fix to avoid out-of-bounds access in f2fs_truncate_inode_blocks()",
    "summary": "In the Linux kernel, the following vulnerability has been resolved: f2fs: fix to avoid out-of-bounds access in f2fs_truncate_inode_blocks() syzbot reports an UBSAN issue as below: ------------[ cut here ]------------ UBSAN: array-index-out-of-bounds in fs/f2fs/node.h:381:10 index 18446744073709550692 is out of range for type '__le32[5]' (aka 'unsigned int[5]') CPU: 0 UID: 0 PID: 5318 Comm: syz.0.0 Not tainted 6.14.0-rc3-syzkaller-00060-g6537cfb395f3 #0 Call Trace: __dump_stack lib/dump_stack.c:94 [inline] dump_stack_lvl+0x241/0x360 lib/dump_stack.c:120 ubsan_epilogue lib/ubsan.c:231 [inline] __ubsan_handle_out_of_bounds+0x121/0x150 lib/ubsan.c:429 get_nid fs/f2fs/node.h:381 [inline] f2fs_truncate_inode_blocks+0xa5e/0xf60 fs/f2fs/node.c:1181 f2fs_do_truncate_blocks+0x782/0x1030 fs/f2fs/file.c:808 f2fs_truncate_blocks+0x10d/0x300 fs/f2fs/file.c:836 f2fs_truncate+0x417/0x720 fs/f2fs/file.c:886 f2fs_file_write_iter+0x1bdb/0x2550 fs/f2fs/file.c:5093 aio_write+0x56b/0x7c0 fs/aio.c:1633 io_submit_one+0x8a7/0x18a0 fs/aio.c:2052 __do_sys_io_submit fs/aio.c:2111 [inline] __se_sys_io_submit+0x171/0x2e0 fs/aio.c:2081 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7f238798cde9 index 18446744073709550692 (decimal, unsigned long long) = 0xfffffffffffffc64 (hexadecimal, unsigned long long) = -924 (decimal, long long) In f2fs_truncate_inode_blocks(), UBSAN detects that get_nid() tries ",
    "evidence": "osv:CVE-2025-37739",
    "products": [
      {
        "name": {
          "value": "Kernel",
          "evidence": "/affected/1/package/name"
        },
        "prerequisites": [],
        "fixed_versions": [
          {
            "value": "5.10.237",
            "evidence": "/affected/1/ranges"
          },
          {
            "value": "5.15.181",
            "evidence": "/affected/1/ranges"
          },
          {
            "value": "6.1.135",
            "evidence": "/affected/1/ranges"
          },
          {
            "value": "6.6.88",
            "evidence": "/affected/1/ranges"
          },
          {
            "value": "6.12.24",
            "evidence": "/affected/1/ranges"
          },
          {
            "value": "6.13.12",
            "evidence": "/affected/1/ranges"
          },
          {
            "value": "6.14.3",
            "evidence": "/affected/1/ranges"
          }
        ],
        "affected_versions": []
      }
    ],
    "severity": "unknown",
    "structured": {
      "id": "CVE-2025-37739",
      "aliases": [
        "CVE-2025-37739"
      ],
      "affected": [
        {
          "ranges": [
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              "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
              "type": "GIT",
              "events": [
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                {
                  "fixed": "a67e1bf03c609a751d1740a1789af25e599966fa"
                },
                {
                  "fixed": "67e16ccba74dd8de0a7b10062f1e02d77432f573"
                },
                {
                  "fixed": "98dbf2af63de0b551082c9bc48333910e009b09f"
                },
                {
                  "fixed": "8b5e5aac44fee122947a269f9034c048e4c295de"
                },
                {
                  "fixed": "ecc461331604b07cdbdb7360dbdf78471653264c"
                },
                {
                  "fixed": "d7242fd7946d4cba0411effb6b5048ca55125747"
                },
                {
                  "fixed": "6ba8b41d0aa4b82f90f0c416cb53fcef9696525d"
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                {
                  "fixed": "e6494977bd4a83862118a05f57a8df40256951c0"
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          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2025-37739.json"
          }
        },
        {
          "ranges": [
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "3.8.0"
                },
                {
                  "fixed": "5.10.237"
                }
              ]
            },
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "5.11.0"
                },
                {
                  "fixed": "5.15.181"
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              ]
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            {
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                },
                {
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              ]
            },
            {
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              "events": [
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                  "introduced": "6.13.0"
                },
                {
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              ]
            },
            {
              "type": "ECOSYSTEM",
              "events": [
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                  "introduced": "6.14.0"
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                {
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          ],
          "package": {
            "name": "Kernel",
            "ecosystem": "Linux"
          },
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2025-37739.json"
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      ],
      "modified": "2026-10-28T02:30:28.202020352Z",
      "provider": "osv",
      "references": [
        "https://git.kernel.org/stable/c/67e16ccba74dd8de0a7b10062f1e02d77432f573",
        "https://git.kernel.org/stable/c/6ba8b41d0aa4b82f90f0c416cb53fcef9696525d",
        "https://git.kernel.org/stable/c/8b5e5aac44fee122947a269f9034c048e4c295de",
        "https://git.kernel.org/stable/c/98dbf2af63de0b551082c9bc48333910e009b09f",
        "https://git.kernel.org/stable/c/a67e1bf03c609a751d1740a1789af25e599966fa",
        "https://git.kernel.org/stable/c/d7242fd7946d4cba0411effb6b5048ca55125747",
        "https://git.kernel.org/stable/c/e6494977bd4a83862118a05f57a8df40256951c0",
        "https://git.kernel.org/stable/c/ecc461331604b07cdbdb7360dbdf78471653264c",
        "https://lists.debian.org/debian-lts-announce/2025/05/msg00030.html",
        "https://lists.debian.org/debian-lts-announce/2025/05/msg00045.html",
        "https://github.com/CVEProject/cvelistV5/tree/main/cves/2025/37xxx/CVE-2025-37739.json",
        "https://nvd.nist.gov/vuln/detail/CVE-2025-37739",
        "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"
      ],
      "provider_metadata": {
        "cna_assigner": "Linux",
        "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2025/37xxx/CVE-2025-37739.json"
      }
    },
    "related_cves": [
      {
        "value": "CVE-2025-37739",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": null
  },
  "source_id": "core-osv",
  "document_id": 494577,
  "published_at": "2025-05-01T12:55:48.616+00:00"
}