ghsa-4hcm-79j9-x472
Vulnerability from github
Published
2025-09-17 15:30
Modified
2025-09-17 15:30
Details

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

fs: fix UAF/GPF bug in nilfs_mdt_destroy

In alloc_inode, inode_init_always() could return -ENOMEM if security_inode_alloc() fails, which causes inode->i_private uninitialized. Then nilfs_is_metadata_file_inode() returns true and nilfs_free_inode() wrongly calls nilfs_mdt_destroy(), which frees the uninitialized inode->i_private and leads to crashes(e.g., UAF/GPF).

Fix this by moving security_inode_alloc just prior to this_cpu_inc(nr_inodes)

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{
  "affected": [],
  "aliases": [
    "CVE-2022-50367"
  ],
  "database_specific": {
    "cwe_ids": [],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2025-09-17T15:15:35Z",
    "severity": null
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nfs: fix UAF/GPF bug in nilfs_mdt_destroy\n\nIn alloc_inode, inode_init_always() could return -ENOMEM if\nsecurity_inode_alloc() fails, which causes inode-\u003ei_private\nuninitialized. Then nilfs_is_metadata_file_inode() returns\ntrue and nilfs_free_inode() wrongly calls nilfs_mdt_destroy(),\nwhich frees the uninitialized inode-\u003ei_private\nand leads to crashes(e.g., UAF/GPF).\n\nFix this by moving security_inode_alloc just prior to\nthis_cpu_inc(nr_inodes)",
  "id": "GHSA-4hcm-79j9-x472",
  "modified": "2025-09-17T15:30:38Z",
  "published": "2025-09-17T15:30:38Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2022-50367"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/1e555c3ed1fce4b278aaebe18a64a934cece57d8"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/2a96b532098284ecf8e4849b8b9e5fc7a28bdee9"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/2e488f13755ffbb60f307e991b27024716a33b29"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/64b79e632869ad3ef6c098a4731d559381da1115"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/70e4f70d54e0225f91814e8610477d65f33cefe4"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/81de80330fa6907aec32eb54c5619059e6e36452"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/c0aa76b0f17f59dd9c9d3463550a2986a1d592e4"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/d1ff475d7c83289d0a7faef346ea3bbf90818bad"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/ec2aab115eb38ac4992ea2fcc2a02fbe7af5cf48"
    }
  ],
  "schema_version": "1.4.0",
  "severity": []
}


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