{
  "cveId": "CVE-2026-89841",
  "url": "https://patchblox.com/security/cve/CVE-2026-89841",
  "summary": "CVE-2026-89841 is fixed in linux on 1 platform by DEBIAN-CVE-2026-89841 (version 7.2.6-1), released September 23, 2026. It is not reported as exploited. Patch Radar priority: High.",
  "title": "f2fs: only redirty pinned folios in redirty_blocks",
  "description": "In the Linux kernel, the following vulnerability has been resolved:  f2fs: only redirty pinned folios in redirty_blocks  redirty_blocks() pins folios with read_cache_folio() and then walks the same range again with filemap_lock_folio() to redirty them and drop the references it took.  Commit 5951fee46bef (\u0022f2fs: Use a folio in redirty_blocks()\u0022) changed the second pass to a do/while loop. If read_cache_folio() fails before anything is pinned, page_idx does not advance but the cleanup loop still runs once.  If readahead has already populated the failed folio in page cache, that extra iteration finds it and folio_put_refs(folio, 2) drops one reference too many. Later drop_caches or reclaim can then report \u0022BUG: Bad page state\u0022.  Only redirty the range that was pinned successfully.",
  "published": "2026-09-16T11:16:50Z",
  "severity": "high",
  "cvss": 7.8,
  "cvssVector": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
  "epss": 0.00173,
  "epssPercentile": 0.06802,
  "priority": "High",
  "priorityTier": 3,
  "exploited": false,
  "vendorExploited": false,
  "disclosed": false,
  "vendorAdvisory": "https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-89841",
  "fixes": [
    {
      "platform": "linux",
      "product": "linux",
      "release": "Debian 14",
      "fixedVersion": "7.2.6-1",
      "fix": "DEBIAN-CVE-2026-89841",
      "url": "https://patchblox.com/security/fix/linux/debian-cve-2026-89841",
      "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"
  }
}