ghsa-m8wv-9hr6-j68w
Vulnerability from github
Published
2025-10-04 18:31
Modified
2025-10-04 18:31
Details

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

mm/ksm: fix race with VMA iteration and mm_struct teardown

exit_mmap() will tear down the VMAs and maple tree with the mmap_lock held in write mode. Ensure that the maple tree is still valid by checking ksm_test_exit() after taking the mmap_lock in read mode, but before the for_each_vma() iterator dereferences a destroyed maple tree.

Since the maple tree is destroyed, the flags telling lockdep to check an external lock has been cleared. Skip the for_each_vma() iterator to avoid dereferencing a maple tree without the external lock flag, which would create a lockdep warning.

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{
  "affected": [],
  "aliases": [
    "CVE-2023-53614"
  ],
  "database_specific": {
    "cwe_ids": [],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2025-10-04T16:15:58Z",
    "severity": null
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nmm/ksm: fix race with VMA iteration and mm_struct teardown\n\nexit_mmap() will tear down the VMAs and maple tree with the mmap_lock held\nin write mode.  Ensure that the maple tree is still valid by checking\nksm_test_exit() after taking the mmap_lock in read mode, but before the\nfor_each_vma() iterator dereferences a destroyed maple tree.\n\nSince the maple tree is destroyed, the flags telling lockdep to check an\nexternal lock has been cleared.  Skip the for_each_vma() iterator to avoid\ndereferencing a maple tree without the external lock flag, which would\ncreate a lockdep warning.",
  "id": "GHSA-m8wv-9hr6-j68w",
  "modified": "2025-10-04T18:31:16Z",
  "published": "2025-10-04T18:31:16Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2023-53614"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/286b0cab31bac29960e5684f6fb331d42f03b363"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/6db504ce55bdbc575723938fc480713c9183f6a2"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/b4f664ffd8f78c05a1fd542a28bc5a11e994c014"
    }
  ],
  "schema_version": "1.4.0",
  "severity": []
}


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