{
  "affected": [
    {
      "ranges": [
        {
          "events": [
            {
              "introduced": "8c26c4e2694a163d525976e804d81cd955bbb40c"
            },
            {
              "fixed": "5166a21b12f549774f2983fa86d2526ea9e66ace"
            },
            {
              "fixed": "4e1f21e7540b25d83f86b50780836ed7d2afcc93"
            },
            {
              "fixed": "3904fb0ee741ebbbc27ec8f50a9bb6cd31e8af05"
            },
            {
              "fixed": "f181155baf0c93a74ebe804c6cecbe970e78ee9e"
            },
            {
              "fixed": "66f4ad3ce158902e5f98afea93189972ed8750c2"
            }
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "type": "GIT"
        }
      ]
    },
    {
      "package": {
        "ecosystem": "Linux",
        "name": "Kernel"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "3.10.0"
            },
            {
              "fixed": "6.6.157"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.7.0"
            },
            {
              "fixed": "6.12.110"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.13.0"
            },
            {
              "fixed": "6.18.52"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.19.0"
            },
            {
              "fixed": "7.2.6"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "database_specific": {
    "cna_assigner": "Linux",
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/90xxx/CVE-2026-90418.json"
  },
  "details": "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'dirty' status.\n\nThis issue arises because, since the commit referenced below, the 'dirty'\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 'dirty' state is detected while the filesystem is not in\nread-only mode.",
  "id": "CVE-2026-90418",
  "modified": "2026-09-19T03:30:47.453874827Z",
  "published": "2026-09-17T16:09:43.223Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/3904fb0ee741ebbbc27ec8f50a9bb6cd31e8af05"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/4e1f21e7540b25d83f86b50780836ed7d2afcc93"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/5166a21b12f549774f2983fa86d2526ea9e66ace"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/66f4ad3ce158902e5f98afea93189972ed8750c2"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/f181155baf0c93a74ebe804c6cecbe970e78ee9e"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/90xxx/CVE-2026-90418.json"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-90418"
    },
    {
      "type": "PACKAGE",
      "url": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"
    }
  ],
  "schema_version": "1.9.0",
  "summary": "nilfs2: fix BUG in nilfs_copy_dirty_pages() on dirty state mismatch"
}