{
  "cveId": "CVE-2026-90205",
  "url": "https://patchblox.com/security/cve/CVE-2026-90205",
  "summary": "CVE-2026-90205 is fixed in linux on 1 platform, first by DEBIAN-CVE-2026-90205, released September 23, 2026. It is not reported as exploited. Patch Radar priority: High.",
  "title": "ocfs2: validate orphan slot during inode read",
  "description": "In the Linux kernel, the following vulnerability has been resolved:  ocfs2: validate orphan slot during inode read  Patch series \u0022ocfs2: validate active orphan slots during inode read\u0022.  OCFS2 trusts active ordinary and append-DIO orphan slots read from dinodes. A corrupted slot can therefore index osb_orphan_wipes or the slot-local system-inode cache outside their allocations before the corruption is reported.  Patch 1 validates the ordinary orphan slot used by inode wipe processing. Patch 2 validates the append-DIO orphan slot used by DIO completion and orphan recovery.  Both checks reject corrupt metadata at the existing inode validation boundary.   This patch (of 2):  [BUG] A corrupted dinode with OCFS2_ORPHANED_FL can carry an i_orphaned_slot outside the mounted filesystem slot range. ocfs2_wipe_inode() uses it to index osb_orphan_wipes before looking up the orphan directory, causing an out-of-bounds memory access.  BUG: KASAN: slab-use-after-free in ocfs2_get_system_file_inode\u002B0x780/0x820 fs/ocfs2/sysfile.c:102 Read of size 8 at addr ffff88800b767c00 by task kworker/u8:3/85 Call Trace:  ...  ocfs2_get_system_file_inode\u002B0x780/0x820 fs/ocfs2/sysfile.c:102  ocfs2_wipe_inode\u002B0x292/0xf70 fs/ocfs2/inode.c:840  ocfs2_delete_inode fs/ocfs2/inode.c:1155 [inline]  ocfs2_evict_inode\u002B0x6c9/0x1170 fs/ocfs2/inode.c:1295  evict\u002B0x38e/0x8f0 fs/inode.c:810  iput_final fs/inode.c:1914 [inline]  iput fs/inode.c:1966 [inline]  iput\u002B0x55b/0x8b0 fs/inode.c:1926  ocfs2_recover_orphans\u002B0x610/0xe40 fs/ocfs2/journal.c:2374  ocfs2_complete_recovery\u002B0x5af/0xd00 fs/ocfs2/journal.c:1373  ...  [CAUSE] ocfs2_validate_inode_block() validates i_suballoc_slot but leaves the active ordinary orphan slot unchecked. Downstream consumers assume that the value is smaller than osb-\u003Emax_slots.  [FIX] Reject an active i_orphaned_slot outside the slot range during dinode validation, before the inode reaches orphan wipe processing.",
  "published": "2026-09-17T17:17:15Z",
  "severity": "Moderate",
  "cvss": 7.8,
  "cvssVector": "CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H",
  "epss": 0.00181,
  "epssPercentile": 0.07735,
  "priority": "High",
  "priorityTier": 3,
  "exploited": false,
  "vendorExploited": false,
  "disclosed": false,
  "vendorAdvisory": "https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-90205",
  "fixes": [
    {
      "platform": "linux",
      "product": "linux",
      "release": "Debian 13.5 (trixie)",
      "fixedVersion": "6.12.115-2",
      "fix": "DEBIAN-CVE-2026-90205",
      "url": "https://patchblox.com/security/fix/linux/debian-cve-2026-90205",
      "released": "2026-09-23T19:19:02Z"
    },
    {
      "platform": "linux",
      "product": "linux",
      "release": "Debian 14",
      "fixedVersion": "7.2.6-1",
      "fix": "DEBIAN-CVE-2026-90205",
      "url": "https://patchblox.com/security/fix/linux/debian-cve-2026-90205",
      "released": "2026-09-23T19:19:02Z"
    }
  ],
  "noFixYet": [],
  "dataAsOf": "2026-11-08T06:59:42Z",
  "attribution": {
    "text": "Data: Patchblox Patch Radar",
    "url": "https://patchblox.com/security/patch-radar",
    "terms": "https://patchblox.com/security/patch-radar/use-the-data"
  }
}