{
  "containers": {
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "fs/ocfs2/inode.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "edd76be702c0f8702472888425237fb9219e1c43",
              "status": "affected",
              "version": "b4df6ed8db0c387d38292e31f00adc4cd297ed5a",
              "versionType": "git"
            },
            {
              "lessThan": "f535a34831f8325950933b401c76bfa99624419c",
              "status": "affected",
              "version": "b4df6ed8db0c387d38292e31f00adc4cd297ed5a",
              "versionType": "git"
            },
            {
              "lessThan": "dea50e8049b0db2eb3d468e2505034962e81d8cd",
              "status": "affected",
              "version": "b4df6ed8db0c387d38292e31f00adc4cd297ed5a",
              "versionType": "git"
            },
            {
              "lessThan": "c6c908f9b4edfb04534b15573168ae038f7a9cbf",
              "status": "affected",
              "version": "b4df6ed8db0c387d38292e31f00adc4cd297ed5a",
              "versionType": "git"
            },
            {
              "lessThan": "3d7c4b7ce7b4baedfd8699fa692cd95f77d332de",
              "status": "affected",
              "version": "b4df6ed8db0c387d38292e31f00adc4cd297ed5a",
              "versionType": "git"
            },
            {
              "lessThan": "b2d31acbd3b182755b019183fb46949ba5e39b9f",
              "status": "affected",
              "version": "b4df6ed8db0c387d38292e31f00adc4cd297ed5a",
              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "fs/ocfs2/inode.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "2.6.16"
            },
            {
              "lessThan": "2.6.16",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.1.*",
              "status": "unaffected",
              "version": "6.1.191",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.6.*",
              "status": "unaffected",
              "version": "6.6.160",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.12.*",
              "status": "unaffected",
              "version": "6.12.114",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.18.*",
              "status": "unaffected",
              "version": "6.18.52",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "7.2.*",
              "status": "unaffected",
              "version": "7.2.6",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "7.3",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "cpeApplicability": [
        {
          "nodes": [
            {
              "cpeMatch": [
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.1.191",
                  "versionStartIncluding": "2.6.16",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.6.160",
                  "versionStartIncluding": "2.6.16",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.12.114",
                  "versionStartIncluding": "2.6.16",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.18.52",
                  "versionStartIncluding": "2.6.16",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "7.2.6",
                  "versionStartIncluding": "2.6.16",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "7.3",
                  "versionStartIncluding": "2.6.16",
                  "vulnerable": true
                }
              ],
              "negate": false,
              "operator": "OR"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "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."
        }
      ],
      "metrics": [
        {
          "cvssV3_1": {
            "baseScore": 7.8,
            "baseSeverity": "HIGH",
            "vectorString": "CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H",
            "version": "3.1"
          },
          "scenarios": [
            {
              "lang": "en",
              "value": "AV:L - The attacker-controlled field is dinode i_orphaned_slot, read from the mounted block device in ocfs2_validate_inode_block()/ocfs2_read_locked_inode() and consumed by ocfs2_wipe_inode(); it is not a field of an o2net, NFS, or SMB message. Delivery is a locally mounted OCFS2 image (loop or other block device).\nAC:L - A crafted dinode with OCFS2_ORPHANED_FL and an attacker-chosen i_orphaned_slot is accepted before the fix. ocfs2_fill_super() calls ocfs2_complete_mount_recovery(), which queues ocfs2_recover_orphans(); that igets the orphan and iputs it into ocfs2_evict_inode()\u2192ocfs2_wipe_inode() with no race.\nPR:N - ocfs2_fs_type.fs_flags has no FS_USERNS_MOUNT, so only a privileged mount(2) via ocfs2_get_tree()/ocfs2_fill_super() reaches recovery. The attacker who supplies the image needs no host credentials; unlink cannot plant this value because ocfs2_orphan_add() writes osb-\u003eslot_num.\nUI:R - The bug fires from ocfs2_complete_recovery()\u2192ocfs2_recover_orphans() after the victim mounts the crafted volume through ocfs2_fill_super(). That mount is the required user action and cannot be treated as a standing export of already-on-disk metadata.\nS:U - The out-of-bounds accesses in ocfs2_check_orphan_recovery_state() and get_local_system_inode() corrupt memory in the kernel that mounted the OCFS2 volume. No KVM, Xen, or IOMMU boundary is crossed.\nC:H - get_local_system_inode() computes index = i_orphaned_slot * NUM_LOCAL_SYSTEM_INODES and reads an 8-byte inode pointer past the kcalloc\u0027d local_system_inodes array (KASAN UAF read in ocfs2_get_system_file_inode). A non-NULL value is passed to igrab(), disclosing adjacent slab contents.\nI:H - ocfs2_check_orphan_recovery_state() does osb-\u003eosb_orphan_wipes[slot]++ with the untrusted i_orphaned_slot against a kcalloc(max_slots) array (max_slots \u2264 255), a heap out-of-bounds increment. The OOB pointer is then used as an inode in inode_lock/ocfs2_inode_lock.\nA:H - ocfs2_node_map_test_bit() BUG()s when i_orphaned_slot \u003e= OCFS2_NODE_MAP_MAX_NODES (256). Smaller out-of-range slots still OOB-index osb_orphan_wipes[] and local_system_inodes[], which KASAN reported as slab-use-after-free during ocfs2_recover_orphans() in ocfs2_complete_recovery()."
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-10-30T12:34:45.443Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/edd76be702c0f8702472888425237fb9219e1c43"
        },
        {
          "url": "https://git.kernel.org/stable/c/f535a34831f8325950933b401c76bfa99624419c"
        },
        {
          "url": "https://git.kernel.org/stable/c/dea50e8049b0db2eb3d468e2505034962e81d8cd"
        },
        {
          "url": "https://git.kernel.org/stable/c/c6c908f9b4edfb04534b15573168ae038f7a9cbf"
        },
        {
          "url": "https://git.kernel.org/stable/c/3d7c4b7ce7b4baedfd8699fa692cd95f77d332de"
        },
        {
          "url": "https://git.kernel.org/stable/c/b2d31acbd3b182755b019183fb46949ba5e39b9f"
        }
      ],
      "title": "ocfs2: validate orphan slot during inode read",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2026-90205",
    "datePublished": "2026-09-17T16:07:21.521Z",
    "dateReserved": "2026-09-11T19:38:34.793Z",
    "dateUpdated": "2026-10-30T12:34:45.443Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}