CVE-2026-90420 (GCVE-0-2026-90420)
Vulnerability from cvelistv5
Published
2026-09-17 16:09
Modified
2026-10-19 09:03
Severity ?
Summary
In the Linux kernel, the following vulnerability has been resolved: nilfs2: fix infinite loop in nilfs_clean_segments() syzbot reported a hung task in nilfs_transaction_begin(). This occurs because the cleaner ioctl falls into an infinite loop if nilfs_segctor_construct() repeatedly returns -EROFS (e.g. the device is remounted as read-only after an I/O error). Currently in nilfs_clean_segments(), if err is non-zero, it logs the error and sleeps but doesn't abort when it encounters a terminal error like -EROFS. This causes the thread to loop forever. Fix this by breaking out of the loop if nilfs_segctor_construct() returns -EROFS. This matches the behaviour in nilfs_segctor_write_out(), which also handles -EROFS.
References
Impacted products
Vendor Product Version
Linux Linux Version: 9ff05123e3bfbb1d2b68ba1d9bf1f7d1dffc1453
Version: 9ff05123e3bfbb1d2b68ba1d9bf1f7d1dffc1453
Version: 9ff05123e3bfbb1d2b68ba1d9bf1f7d1dffc1453
Version: 9ff05123e3bfbb1d2b68ba1d9bf1f7d1dffc1453
Version: 9ff05123e3bfbb1d2b68ba1d9bf1f7d1dffc1453
Version: 9ff05123e3bfbb1d2b68ba1d9bf1f7d1dffc1453
Version: 9ff05123e3bfbb1d2b68ba1d9bf1f7d1dffc1453
Version: 9ff05123e3bfbb1d2b68ba1d9bf1f7d1dffc1453
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{
  "containers": {
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          "programFiles": [
            "fs/nilfs2/segment.c"
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              "version": "0",
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      ],
      "cpeApplicability": [
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              "negate": false,
              "operator": "OR"
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      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnilfs2: fix infinite loop in nilfs_clean_segments()\n\nsyzbot reported a hung task in nilfs_transaction_begin(). This occurs\nbecause the cleaner ioctl falls into an infinite loop if\nnilfs_segctor_construct() repeatedly returns -EROFS (e.g. the device\nis remounted as read-only after an I/O error).\n\nCurrently in nilfs_clean_segments(), if err is non-zero, it logs the\nerror and sleeps but doesn\u0027t abort when it encounters a terminal error\nlike -EROFS. This causes the thread to loop forever.\n\nFix this by breaking out of the loop if nilfs_segctor_construct()\nreturns -EROFS. This matches the behaviour in\nnilfs_segctor_write_out(), which also handles -EROFS."
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-10-19T09:03:24.266Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/e3e9367dae1a6392cbb14ab0b2ab5edbf39735c3"
        },
        {
          "url": "https://git.kernel.org/stable/c/217b967ad7887a3e1ebc08f46f6484e081acd4b4"
        },
        {
          "url": "https://git.kernel.org/stable/c/3bcdbdaac884a4baa59716cf9bd9470c75276e2d"
        },
        {
          "url": "https://git.kernel.org/stable/c/d7afca8e4efbf4c455b4663c29ae59fde2f1b671"
        },
        {
          "url": "https://git.kernel.org/stable/c/c07e5ad6539e7e9350d5c65cbf8adb69d1711b15"
        },
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          "url": "https://git.kernel.org/stable/c/1fc6df85b4954b6fda9c351843aaca3c06f66d8d"
        },
        {
          "url": "https://git.kernel.org/stable/c/8cea0bc78ac64cb88da49c07f80bf2cf9fb7aff8"
        },
        {
          "url": "https://git.kernel.org/stable/c/ce5a5ad1a8330a2fcfdd9ec2ab341be739e89a18"
        }
      ],
      "title": "nilfs2: fix infinite loop in nilfs_clean_segments()",
      "x_generator": {
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      }
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  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2026-90420",
    "datePublished": "2026-09-17T16:09:44.558Z",
    "dateReserved": "2026-09-11T19:38:34.813Z",
    "dateUpdated": "2026-10-19T09:03:24.266Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}


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