ghsa-q97v-qf9h-f4xh
Vulnerability from github
Published
2025-09-18 18:30
Modified
2025-09-18 18:30
Details

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

ext4: fix undefined behavior in bit shift for ext4_check_flag_values

Shifting signed 32-bit value by 31 bits is undefined, so changing significant bit to unsigned. The UBSAN warning calltrace like below:

UBSAN: shift-out-of-bounds in fs/ext4/ext4.h:591:2 left shift of 1 by 31 places cannot be represented in type 'int' Call Trace: dump_stack_lvl+0x7d/0xa5 dump_stack+0x15/0x1b ubsan_epilogue+0xe/0x4e __ubsan_handle_shift_out_of_bounds+0x1e7/0x20c ext4_init_fs+0x5a/0x277 do_one_initcall+0x76/0x430 kernel_init_freeable+0x3b3/0x422 kernel_init+0x24/0x1e0 ret_from_fork+0x1f/0x30

Show details on source website

To clipboard 

{
  "affected": [],
  "aliases": [
    "CVE-2022-50403"
  ],
  "database_specific": {
    "cwe_ids": [],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2025-09-18T16:15:43Z",
    "severity": null
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\next4: fix undefined behavior in bit shift for ext4_check_flag_values\n\nShifting signed 32-bit value by 31 bits is undefined, so changing\nsignificant bit to unsigned. The UBSAN warning calltrace like below:\n\nUBSAN: shift-out-of-bounds in fs/ext4/ext4.h:591:2\nleft shift of 1 by 31 places cannot be represented in type \u0027int\u0027\nCall Trace:\n \u003cTASK\u003e\n dump_stack_lvl+0x7d/0xa5\n dump_stack+0x15/0x1b\n ubsan_epilogue+0xe/0x4e\n __ubsan_handle_shift_out_of_bounds+0x1e7/0x20c\n ext4_init_fs+0x5a/0x277\n do_one_initcall+0x76/0x430\n kernel_init_freeable+0x3b3/0x422\n kernel_init+0x24/0x1e0\n ret_from_fork+0x1f/0x30\n \u003c/TASK\u003e",
  "id": "GHSA-q97v-qf9h-f4xh",
  "modified": "2025-09-18T18:30:26Z",
  "published": "2025-09-18T18:30:26Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2022-50403"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/205ac16628aca9093931fcbdb4bcd00d0eb94132"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/3bf678a0f9c017c9ba7c581541dbc8453452a7ae"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/4690a4bdcf1470cb161aff1be30bd143b9dffd89"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/5da9e607547f73dc7a643f35b0487992fd66910f"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/743e9d708743d98464ccbd56e820d87dc6d1d629"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/7753d6657873a2523a9989e6c09090cd503bbcda"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/d7f93fc6fba8ff017be871be7edf8614a785ccad"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/dd5639d36a5e4e42fd0fe05cc0b2ad9ddd3fca9d"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/f9cd6980800bbfd11bf94eb5f942049d4d4eaa52"
    }
  ],
  "schema_version": "1.4.0",
  "severity": []
}


Log in or create an account to share your comment.




Tags
Taxonomy of the tags.




Sightings

Author Source Type Date

Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or seen somewhere by the user.
  • Confirmed: The vulnerability is confirmed from an analyst perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • Exploited: This vulnerability was exploited and seen by the user reporting the sighting.
  • Patched: This vulnerability was successfully patched by the user reporting the sighting.
  • Not exploited: This vulnerability was not exploited or seen by the user reporting the sighting.
  • Not confirmed: The user expresses doubt about the veracity of the vulnerability.
  • Not patched: This vulnerability was not successfully patched by the user reporting the sighting.