{
  "cveId": "CVE-2026-90418",
  "url": "https://patchblox.com/security/cve/CVE-2026-90418",
  "summary": "CVE-2026-90418 is fixed in 2 products on 1 platform, first by DEBIAN-CVE-2026-90418, released September 23, 2026. It is not reported as exploited. Patch Radar priority: Routine.",
  "title": "nilfs2: fix BUG in nilfs_copy_dirty_pages() on dirty state mismatch",
  "description": "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 \u0027dirty\u0027 status.  This issue arises because, since the commit referenced below, the \u0027dirty\u0027 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 \u0027dirty\u0027 state is detected while the filesystem is not in read-only mode.",
  "published": "2026-09-17T17:17:46Z",
  "severity": "Moderate",
  "cvss": 5.5,
  "epss": 0.00173,
  "epssPercentile": 0.06699,
  "priority": "Routine",
  "priorityTier": 4,
  "exploited": false,
  "vendorExploited": false,
  "disclosed": false,
  "vendorAdvisory": "https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-90418",
  "fixes": [
    {
      "platform": "linux",
      "product": "linux",
      "release": "Debian 13.5 (trixie)",
      "fixedVersion": "6.12.111-1",
      "fix": "DEBIAN-CVE-2026-90418",
      "url": "https://patchblox.com/security/fix/linux/debian-cve-2026-90418",
      "released": "2026-09-23T19:19:02Z"
    },
    {
      "platform": "linux",
      "product": "linux",
      "release": "Debian 14",
      "fixedVersion": "7.2.6-1",
      "fix": "DEBIAN-CVE-2026-90418",
      "url": "https://patchblox.com/security/fix/linux/debian-cve-2026-90418",
      "released": "2026-09-23T19:19:02Z"
    },
    {
      "platform": "linux",
      "product": "linux-6.12",
      "release": "Debian 12.15 (bookworm)",
      "fixedVersion": "6.12.111-1~deb12u1",
      "fix": "DEBIAN-CVE-2026-90418",
      "url": "https://patchblox.com/security/fix/linux/debian-cve-2026-90418",
      "released": "2026-09-23T19:19:02Z"
    }
  ],
  "noFixYet": [],
  "dataAsOf": "2026-11-09T01:18:40Z",
  "attribution": {
    "text": "Data: Patchblox Patch Radar",
    "url": "https://patchblox.com/security/patch-radar",
    "terms": "https://patchblox.com/security/patch-radar/use-the-data"
  }
}