GHSA-8PW9-7GV3-535C

Vulnerability from github – Published: 2025-01-21 15:31 – Updated: 2025-11-03 21:32
VLAI?
Details

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

exfat: fix the infinite loop in exfat_readdir()

If the file system is corrupted so that a cluster is linked to itself in the cluster chain, and there is an unused directory entry in the cluster, 'dentry' will not be incremented, causing condition 'dentry < max_dentries' unable to prevent an infinite loop.

This infinite loop causes s_lock not to be released, and other tasks will hang, such as exfat_sync_fs().

This commit stops traversing the cluster chain when there is unused directory entry in the cluster to avoid this infinite loop.

Severity ?
5.5 (Medium)
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
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{
  "affected": [],
  "aliases": [
    "CVE-2024-57940"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-835"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2025-01-21T13:15:08Z",
    "severity": "MODERATE"
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nexfat: fix the infinite loop in exfat_readdir()\n\nIf the file system is corrupted so that a cluster is linked to\nitself in the cluster chain, and there is an unused directory\nentry in the cluster, \u0027dentry\u0027 will not be incremented, causing\ncondition \u0027dentry \u003c max_dentries\u0027 unable to prevent an infinite\nloop.\n\nThis infinite loop causes s_lock not to be released, and other\ntasks will hang, such as exfat_sync_fs().\n\nThis commit stops traversing the cluster chain when there is unused\ndirectory entry in the cluster to avoid this infinite loop.",
  "id": "GHSA-8pw9-7gv3-535c",
  "modified": "2025-11-03T21:32:15Z",
  "published": "2025-01-21T15:31:03Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2024-57940"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/28c21f0ac5293a4bf19b3e0e32005d6dd31a6c17"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/31beabd0f47f8c3ed9965ba861c9e5b252d4920a"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/d8cfbb8723bd3d3222f360227a1cc15227189ca6"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/d9ea94f5cd117d56e573696d0045ab3044185a15"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/dc1d7afceb982e8f666e70a582e6b5aa806de063"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/fee873761bd978d077d8c55334b4966ac4cb7b59"
    },
    {
      "type": "WEB",
      "url": "https://lists.debian.org/debian-lts-announce/2025/03/msg00001.html"
    },
    {
      "type": "WEB",
      "url": "https://lists.debian.org/debian-lts-announce/2025/03/msg00002.html"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",
      "type": "CVSS_V3"
    }
  ]
}


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Detection rules are retrieved from Rulezet.