ghsa-cgrx-9qvf-wh88
Vulnerability from github
Published
2025-08-16 12:30
Modified
2025-08-16 12:30
Details

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

efivarfs: Fix memory leak of efivarfs_fs_info in fs_context error paths

When processing mount options, efivarfs allocates efivarfs_fs_info (sfi) early in fs_context initialization. However, sfi is associated with the superblock and typically freed when the superblock is destroyed. If the fs_context is released (final put) before fill_super is called—such as on error paths or during reconfiguration—the sfi structure would leak, as ownership never transfers to the superblock.

Implement the .free callback in efivarfs_context_ops to ensure any allocated sfi is properly freed if the fs_context is torn down before fill_super, preventing this memory leak.

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{
  "affected": [],
  "aliases": [
    "CVE-2025-38549"
  ],
  "database_specific": {
    "cwe_ids": [],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2025-08-16T12:15:31Z",
    "severity": null
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nefivarfs: Fix memory leak of efivarfs_fs_info in fs_context error paths\n\nWhen processing mount options, efivarfs allocates efivarfs_fs_info (sfi)\nearly in fs_context initialization. However, sfi is associated with the\nsuperblock and typically freed when the superblock is destroyed. If the\nfs_context is released (final put) before fill_super is called\u2014such as\non error paths or during reconfiguration\u2014the sfi structure would leak,\nas ownership never transfers to the superblock.\n\nImplement the .free callback in efivarfs_context_ops to ensure any\nallocated sfi is properly freed if the fs_context is torn down before\nfill_super, preventing this memory leak.",
  "id": "GHSA-cgrx-9qvf-wh88",
  "modified": "2025-08-16T12:30:33Z",
  "published": "2025-08-16T12:30:33Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2025-38549"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/64e135f1eaba0bbb0cdee859af3328c68d5b9789"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/816d36973467d1c9c08a48bdffe4675e219a2e84"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/e9fabe7036bb8be6071f39dc38605508f5f57b20"
    }
  ],
  "schema_version": "1.4.0",
  "severity": []
}


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