ghsa-w7j9-m3x4-j6vr
Vulnerability from github
Published
2025-10-22 15:31
Modified
2025-10-22 15:31
Details

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

hfs: fix OOB Read in __hfs_brec_find

Syzbot reported a OOB read bug:

================================================================== BUG: KASAN: slab-out-of-bounds in hfs_strcmp+0x117/0x190 fs/hfs/string.c:84 Read of size 1 at addr ffff88807eb62c4e by task kworker/u4:1/11 CPU: 1 PID: 11 Comm: kworker/u4:1 Not tainted 6.1.0-rc6-syzkaller-00308-g644e9524388a #0 Workqueue: writeback wb_workfn (flush-7:0) Call Trace: __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0x1b1/0x28e lib/dump_stack.c:106 print_address_description+0x74/0x340 mm/kasan/report.c:284 print_report+0x107/0x1f0 mm/kasan/report.c:395 kasan_report+0xcd/0x100 mm/kasan/report.c:495 hfs_strcmp+0x117/0x190 fs/hfs/string.c:84 __hfs_brec_find+0x213/0x5c0 fs/hfs/bfind.c:75 hfs_brec_find+0x276/0x520 fs/hfs/bfind.c:138 hfs_write_inode+0x34c/0xb40 fs/hfs/inode.c:462 write_inode fs/fs-writeback.c:1440 [inline]

If the input inode of hfs_write_inode() is incorrect: struct inode struct hfs_inode_info struct hfs_cat_key struct hfs_name u8 len # len is greater than HFS_NAMELEN(31) which is the maximum length of an HFS filename

OOB read occurred: hfs_write_inode() hfs_brec_find() __hfs_brec_find() hfs_cat_keycmp() hfs_strcmp() # OOB read occurred due to len is too large

Fix this by adding a Check on len in hfs_write_inode() before calling hfs_brec_find().

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{
  "affected": [],
  "aliases": [
    "CVE-2022-50581"
  ],
  "database_specific": {
    "cwe_ids": [],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2025-10-22T14:15:43Z",
    "severity": null
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nhfs: fix OOB Read in __hfs_brec_find\n\nSyzbot reported a OOB read bug:\n\n==================================================================\nBUG: KASAN: slab-out-of-bounds in hfs_strcmp+0x117/0x190\nfs/hfs/string.c:84\nRead of size 1 at addr ffff88807eb62c4e by task kworker/u4:1/11\nCPU: 1 PID: 11 Comm: kworker/u4:1 Not tainted\n6.1.0-rc6-syzkaller-00308-g644e9524388a #0\nWorkqueue: writeback wb_workfn (flush-7:0)\nCall Trace:\n \u003cTASK\u003e\n __dump_stack lib/dump_stack.c:88 [inline]\n dump_stack_lvl+0x1b1/0x28e lib/dump_stack.c:106\n print_address_description+0x74/0x340 mm/kasan/report.c:284\n print_report+0x107/0x1f0 mm/kasan/report.c:395\n kasan_report+0xcd/0x100 mm/kasan/report.c:495\n hfs_strcmp+0x117/0x190 fs/hfs/string.c:84\n __hfs_brec_find+0x213/0x5c0 fs/hfs/bfind.c:75\n hfs_brec_find+0x276/0x520 fs/hfs/bfind.c:138\n hfs_write_inode+0x34c/0xb40 fs/hfs/inode.c:462\n write_inode fs/fs-writeback.c:1440 [inline]\n\nIf the input inode of hfs_write_inode() is incorrect:\nstruct inode\n  struct hfs_inode_info\n    struct hfs_cat_key\n      struct hfs_name\n        u8 len # len is greater than HFS_NAMELEN(31) which is the\nmaximum length of an HFS filename\n\nOOB read occurred:\nhfs_write_inode()\n  hfs_brec_find()\n    __hfs_brec_find()\n      hfs_cat_keycmp()\n        hfs_strcmp() # OOB read occurred due to len is too large\n\nFix this by adding a Check on len in hfs_write_inode() before calling\nhfs_brec_find().",
  "id": "GHSA-w7j9-m3x4-j6vr",
  "modified": "2025-10-22T15:31:10Z",
  "published": "2025-10-22T15:31:10Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2022-50581"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/2344f17c0a89c181ab1a9fef57fd8c3bddfd6e30"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/367296925c7625c3969d2a78d7a3e1dee161beb5"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/4fd3a11804c8877ff11fec59c5c53f1635331e3e"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/8c40f2dbae603ef0bd21e87c63f54ec59fd88256"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/8d824e69d9f3fa3121b2dda25053bae71e2460d2"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/90103ccb6e60aa4efe48993d23d6a528472f2233"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/bfc9d8f27f89717431a6aecce42ae230b437433f"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/c886c10a6eddb99923b315f42bf63f448883ef9a"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/e9e692917c6e10a7066c7a6d092dcdc3d4e329f3"
    }
  ],
  "schema_version": "1.4.0",
  "severity": []
}


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