CVE-2026-90418 (GCVE-0-2026-90418)

Vulnerability from cvelistv5 – Published: 2026-09-17 16:09 – Updated: 2026-10-19 09:03
VLAI
Title
nilfs2: fix BUG in nilfs_copy_dirty_pages() on dirty state mismatch
Summary
In the Linux kernel, the following vulnerability has been resolved: nilfs2: fix BUG in nilfs_copy_dirty_pages() on dirty state mismatch Syzbot reported a kernel BUG triggered within nilfs_copy_dirty_pages(), which copies dirty DAT file folios/pages to its shadow page cache. The BUG occurs when a retrieved dirty folio/page unexpectedly loses its 'dirty' status. This issue arises because, since the commit referenced below, the 'dirty' flag of a folio/page can be cleared asynchronously after the filesystem detects metadata corruption and transitions to read-only mode. Resolve the issue by returning an -EROFS error if the filesystem has transitioned to read-only mode. Also change the behavior to issue a kernel warning only once instead of triggering a kernel BUG when this unexpected 'dirty' state is detected while the filesystem is not in read-only mode.
Severity
No CVSS data available.
Assigner
Linux CNA under the mitre root
CNA scorecard D 53/100 over 7061 records in the last 180 days details
References
Impacted products
Vendor Product Version CPE status
Linux Linux Affected: 8c26c4e2694a163d525976e804d81cd955bbb40c , < 5166a21b12f549774f2983fa86d2526ea9e66ace (git)
Affected: 8c26c4e2694a163d525976e804d81cd955bbb40c , < 4e1f21e7540b25d83f86b50780836ed7d2afcc93 (git)
Affected: 8c26c4e2694a163d525976e804d81cd955bbb40c , < 3904fb0ee741ebbbc27ec8f50a9bb6cd31e8af05 (git)
Affected: 8c26c4e2694a163d525976e804d81cd955bbb40c , < f181155baf0c93a74ebe804c6cecbe970e78ee9e (git)
Affected: 8c26c4e2694a163d525976e804d81cd955bbb40c , < 66f4ad3ce158902e5f98afea93189972ed8750c2 (git)
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Linux Linux Affected: 3.10
Unaffected: 0 , < 3.10 (semver)
Unaffected: 6.6.157 , ≤ 6.6.* (semver)
Unaffected: 6.12.110 , ≤ 6.12.* (semver)
Unaffected: 6.18.52 , ≤ 6.18.* (semver)
Unaffected: 7.2.6 , ≤ 7.2.* (semver)
Unaffected: 7.3 , ≤ * (original_commit_for_fix)
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{
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          "programFiles": [
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          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnilfs2: fix BUG in nilfs_copy_dirty_pages() on dirty state mismatch\n\nSyzbot reported a kernel BUG triggered within nilfs_copy_dirty_pages(),\nwhich copies dirty DAT file folios/pages to its shadow page cache.  The\nBUG occurs when a retrieved dirty folio/page unexpectedly loses its\n\u0027dirty\u0027 status.\n\nThis issue arises because, since the commit referenced below, the \u0027dirty\u0027\nflag of a folio/page can be cleared asynchronously after the filesystem\ndetects metadata corruption and transitions to read-only mode.\n\nResolve the issue by returning an -EROFS error if the filesystem has\ntransitioned to read-only mode.  Also change the behavior to issue a\nkernel warning only once instead of triggering a kernel BUG when this\nunexpected \u0027dirty\u0027 state is detected while the filesystem is not in\nread-only mode."
        }
      ],
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        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
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        },
        {
          "url": "https://git.kernel.org/stable/c/66f4ad3ce158902e5f98afea93189972ed8750c2"
        }
      ],
      "title": "nilfs2: fix BUG in nilfs_copy_dirty_pages() on dirty state mismatch",
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    "assignerShortName": "Linux",
    "cveId": "CVE-2026-90418",
    "datePublished": "2026-09-17T16:09:43.223Z",
    "dateReserved": "2026-09-11T19:38:34.813Z",
    "dateUpdated": "2026-10-19T09:03:22.352Z",
    "state": "PUBLISHED"
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      "product_status:fixed": "1",
      "product_status:known_affected": "2",
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      "source": "Microsoft CSAF VEX",
      "status": "final",
      "title": "nilfs2: fix BUG in nilfs_copy_dirty_pages() on dirty state mismatch",
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          }
        ],
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}



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