GHSA-XWM6-35HH-FMXM

Vulnerability from github – Published: 2025-12-24 12:30 – Updated: 2025-12-24 12:30
VLAI?
Details

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

ext4: set goal start correctly in ext4_mb_normalize_request

We need to set ac_g_ex to notify the goal start used in ext4_mb_find_by_goal. Set ac_g_ex instead of ac_f_ex in ext4_mb_normalize_request. Besides we should assure goal start is in range [first_data_block, blocks_count) as ext4_mb_initialize_context does.

[ Added a check to make sure size is less than ar->pright; otherwise we could end up passing an underflowed value of ar->pright - size to ext4_get_group_no_and_offset(), which will trigger a BUG_ON later on. - TYT ]

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{
  "affected": [],
  "aliases": [
    "CVE-2023-54021"
  ],
  "database_specific": {
    "cwe_ids": [],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2025-12-24T11:15:55Z",
    "severity": null
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\next4: set goal start correctly in ext4_mb_normalize_request\n\nWe need to set ac_g_ex to notify the goal start used in\next4_mb_find_by_goal. Set ac_g_ex instead of ac_f_ex in\next4_mb_normalize_request.\nBesides we should assure goal start is in range [first_data_block,\nblocks_count) as ext4_mb_initialize_context does.\n\n[ Added a check to make sure size is less than ar-\u003epright; otherwise\n  we could end up passing an underflowed value of ar-\u003epright - size to\n  ext4_get_group_no_and_offset(), which will trigger a BUG_ON later on.\n  - TYT ]",
  "id": "GHSA-xwm6-35hh-fmxm",
  "modified": "2025-12-24T12:30:28Z",
  "published": "2025-12-24T12:30:28Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2023-54021"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/2479bb6cbdb4d56b807bbe5229e3e26a6f1f4530"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/390eee955d4de4662db5e3e9e9a9eae020432cb7"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/3ca3005b502ca8ea87d6a344323b179b48c4e4a3"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/abb330ffaa3a0ae7ce632e28c9260b461c01f19f"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/b07ffe6927c75d99af534d685282ea188d9f71a6"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/bc4a3e1d07a86ae5845321d371190244acacb2f2"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/c6bee8970075b256fc1b07bf4873049219380818"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/cee78217a7ae72d11c2e21e1a5263b8044489823"
    }
  ],
  "schema_version": "1.4.0",
  "severity": []
}


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