{
  "affected": [
    {
      "ranges": [
        {
          "events": [
            {
              "introduced": "b4df6ed8db0c387d38292e31f00adc4cd297ed5a"
            },
            {
              "fixed": "c6c908f9b4edfb04534b15573168ae038f7a9cbf"
            },
            {
              "fixed": "3d7c4b7ce7b4baedfd8699fa692cd95f77d332de"
            },
            {
              "fixed": "b2d31acbd3b182755b019183fb46949ba5e39b9f"
            }
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "type": "GIT"
        }
      ]
    },
    {
      "package": {
        "ecosystem": "Linux",
        "name": "Kernel"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "2.6.16"
            },
            {
              "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-2026-90205.json"
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nocfs2: validate orphan slot during inode read\n\nPatch series \"ocfs2: validate active orphan slots during inode read\".\n\nOCFS2 trusts active ordinary and append-DIO orphan slots read from dinodes.\nA corrupted slot can therefore index osb_orphan_wipes or the slot-local\nsystem-inode cache outside their allocations before the corruption is\nreported.\n\nPatch 1 validates the ordinary orphan slot used by inode wipe processing.\nPatch 2 validates the append-DIO orphan slot used by DIO completion and\norphan recovery.  Both checks reject corrupt metadata at the existing inode\nvalidation boundary.\n\n\nThis patch (of 2):\n\n[BUG]\nA corrupted dinode with OCFS2_ORPHANED_FL can carry an\ni_orphaned_slot outside the mounted filesystem slot range.\nocfs2_wipe_inode() uses it to index osb_orphan_wipes before looking\nup the orphan directory, causing an out-of-bounds memory access.\n\nBUG: KASAN: slab-use-after-free in ocfs2_get_system_file_inode+0x780/0x820 fs/ocfs2/sysfile.c:102\nRead of size 8 at addr ffff88800b767c00 by task kworker/u8:3/85\nCall Trace:\n ...\n ocfs2_get_system_file_inode+0x780/0x820 fs/ocfs2/sysfile.c:102\n ocfs2_wipe_inode+0x292/0xf70 fs/ocfs2/inode.c:840\n ocfs2_delete_inode fs/ocfs2/inode.c:1155 [inline]\n ocfs2_evict_inode+0x6c9/0x1170 fs/ocfs2/inode.c:1295\n evict+0x38e/0x8f0 fs/inode.c:810\n iput_final fs/inode.c:1914 [inline]\n iput fs/inode.c:1966 [inline]\n iput+0x55b/0x8b0 fs/inode.c:1926\n ocfs2_recover_orphans+0x610/0xe40 fs/ocfs2/journal.c:2374\n ocfs2_complete_recovery+0x5af/0xd00 fs/ocfs2/journal.c:1373\n ...\n\n[CAUSE]\nocfs2_validate_inode_block() validates i_suballoc_slot but leaves\nthe active ordinary orphan slot unchecked. Downstream consumers\nassume that the value is smaller than osb-\u003emax_slots.\n\n[FIX]\nReject an active i_orphaned_slot outside the slot range during\ndinode validation, before the inode reaches orphan wipe processing.",
  "id": "CVE-2026-90205",
  "modified": "2026-09-19T03:30:15.085235151Z",
  "published": "2026-09-17T16:07:21.521Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/3d7c4b7ce7b4baedfd8699fa692cd95f77d332de"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/b2d31acbd3b182755b019183fb46949ba5e39b9f"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/c6c908f9b4edfb04534b15573168ae038f7a9cbf"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/90xxx/CVE-2026-90205.json"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-90205"
    },
    {
      "type": "PACKAGE",
      "url": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"
    }
  ],
  "schema_version": "1.9.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H",
      "type": "CVSS_V3"
    }
  ],
  "summary": "ocfs2: validate orphan slot during inode read"
}