{
  "affected": [
    {
      "ecosystem_specific": {
        "urgency": "not yet assigned"
      },
      "package": {
        "ecosystem": "Debian:14",
        "name": "linux"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "7.2.8-1"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "details": "In the Linux kernel, the following vulnerability has been resolved:  mm: filemap: retain mapped dropbehind folios  Fault-around can map ready dropbehind folios without going through the normal page-cache lookup that clears dropbehind.  A mapping represents a competing cached user, so retain the folio instead of forcibly unmapping it when writeback completes.  For a mapped folio, folio_unmap_invalidate() can call unmap_mapping_folio(), which takes i_mmap_rwsem and may sleep.  Retaining mapped folios avoids this path when folio_end_dropbehind() runs in non-preemptible task context.  Tal was able to trigger a sleeping-in-atomic warning due to this [1].  Unmapped dropbehind folios continue through the existing invalidation path.",
  "id": "DEBIAN-CVE-2026-98223",
  "modified": "2026-10-07T04:47:33.112812353Z",
  "published": "2026-10-06T09:18:09.290Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://security-tracker.debian.org/tracker/CVE-2026-98223"
    }
  ],
  "upstream": [
    "CVE-2026-98223"
  ]
}