CVE-2023-53337 (GCVE-0-2023-53337)
Vulnerability from cvelistv5
Published
2025-09-17 14:56
Modified
2025-09-17 14:56
Severity ?
Summary
In the Linux kernel, the following vulnerability has been resolved: nilfs2: do not write dirty data after degenerating to read-only According to syzbot's report, mark_buffer_dirty() called from nilfs_segctor_do_construct() outputs a warning with some patterns after nilfs2 detects metadata corruption and degrades to read-only mode. After such read-only degeneration, page cache data may be cleared through nilfs_clear_dirty_page() which may also clear the uptodate flag for their buffer heads. However, even after the degeneration, log writes are still performed by unmount processing etc., which causes mark_buffer_dirty() to be called for buffer heads without the "uptodate" flag and causes the warning. Since any writes should not be done to a read-only file system in the first place, this fixes the warning in mark_buffer_dirty() by letting nilfs_segctor_do_construct() abort early if in read-only mode. This also changes the retry check of nilfs_segctor_write_out() to avoid unnecessary log write retries if it detects -EROFS that nilfs_segctor_do_construct() returned.
References
Impacted products
Vendor Product Version
Linux Linux Version: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2
Version: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2
Version: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2
Version: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2
Version: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2
Version: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2
Version: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2
Version: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2
Version: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2
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{
  "containers": {
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          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "fs/nilfs2/segment.c"
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          "programFiles": [
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          "vendor": "Linux",
          "versions": [
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              "version": "6.3.2",
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      ],
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      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnilfs2: do not write dirty data after degenerating to read-only\n\nAccording to syzbot\u0027s report, mark_buffer_dirty() called from\nnilfs_segctor_do_construct() outputs a warning with some patterns after\nnilfs2 detects metadata corruption and degrades to read-only mode.\n\nAfter such read-only degeneration, page cache data may be cleared through\nnilfs_clear_dirty_page() which may also clear the uptodate flag for their\nbuffer heads.  However, even after the degeneration, log writes are still\nperformed by unmount processing etc., which causes mark_buffer_dirty() to\nbe called for buffer heads without the \"uptodate\" flag and causes the\nwarning.\n\nSince any writes should not be done to a read-only file system in the\nfirst place, this fixes the warning in mark_buffer_dirty() by letting\nnilfs_segctor_do_construct() abort early if in read-only mode.\n\nThis also changes the retry check of nilfs_segctor_write_out() to avoid\nunnecessary log write retries if it detects -EROFS that\nnilfs_segctor_do_construct() returned."
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2025-09-17T14:56:31.582Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
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          "url": "https://git.kernel.org/stable/c/bd89073fc7a5d03b1d06b372addbe405e5a925f4"
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        {
          "url": "https://git.kernel.org/stable/c/e9c5412c5972124776c1b873533eb39e287a4dfa"
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          "url": "https://git.kernel.org/stable/c/4569a292a84e340e97d178898ad1cfe1a3080a61"
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          "url": "https://git.kernel.org/stable/c/7c3e662048053802f6b0db3a78e97f4e1f7edc4f"
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        },
        {
          "url": "https://git.kernel.org/stable/c/28a65b49eb53e172d23567005465019658bfdb4d"
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      "title": "nilfs2: do not write dirty data after degenerating to read-only",
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  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2023-53337",
    "datePublished": "2025-09-17T14:56:31.582Z",
    "dateReserved": "2025-09-16T16:08:59.565Z",
    "dateUpdated": "2025-09-17T14:56:31.582Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.1",
  "vulnerability-lookup:meta": {
    "nvd": "{\"cve\":{\"id\":\"CVE-2023-53337\",\"sourceIdentifier\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"published\":\"2025-09-17T15:15:36.793\",\"lastModified\":\"2025-09-18T13:43:34.310\",\"vulnStatus\":\"Awaiting Analysis\",\"cveTags\":[],\"descriptions\":[{\"lang\":\"en\",\"value\":\"In the Linux kernel, the following vulnerability has been resolved:\\n\\nnilfs2: do not write dirty data after degenerating to read-only\\n\\nAccording to syzbot\u0027s report, mark_buffer_dirty() called from\\nnilfs_segctor_do_construct() outputs a warning with some patterns after\\nnilfs2 detects metadata corruption and degrades to read-only mode.\\n\\nAfter such read-only degeneration, page cache data may be cleared through\\nnilfs_clear_dirty_page() which may also clear the uptodate flag for their\\nbuffer heads.  However, even after the degeneration, log writes are still\\nperformed by unmount processing etc., which causes mark_buffer_dirty() to\\nbe called for buffer heads without the \\\"uptodate\\\" flag and causes the\\nwarning.\\n\\nSince any writes should not be done to a read-only file system in the\\nfirst place, this fixes the warning in mark_buffer_dirty() by letting\\nnilfs_segctor_do_construct() abort early if in read-only mode.\\n\\nThis also changes the retry check of nilfs_segctor_write_out() to avoid\\nunnecessary log write retries if it detects -EROFS that\\nnilfs_segctor_do_construct() returned.\"}],\"metrics\":{},\"references\":[{\"url\":\"https://git.kernel.org/stable/c/13f73ef77baa4764dc1ca4fcbae9cade05b83866\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/28a65b49eb53e172d23567005465019658bfdb4d\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/4005cec6847c06ee191583270b7cdd7e696543cc\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/4569a292a84e340e97d178898ad1cfe1a3080a61\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/55f7810632f993cff622a0ddbc7c865892294b61\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/7c3e662048053802f6b0db3a78e97f4e1f7edc4f\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/a73201c607d8e506358d60aafddda4246bdd9350\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/bd89073fc7a5d03b1d06b372addbe405e5a925f4\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/e9c5412c5972124776c1b873533eb39e287a4dfa\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"}]}}"
  }
}


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