erofs: stop parsing non-compact HEAD index if clusterofs is invalid

{
  "id": "210306443e30f68e87141d5c8129a6a8112f2a4d428282b4f5c72e32f50a8201",
  "url": "https://osv.dev/vulnerability/CVE-2023-54132",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "erofs: stop parsing non-compact HEAD index if clusterofs is invalid",
    "summary": "In the Linux kernel, the following vulnerability has been resolved: erofs: stop parsing non-compact HEAD index if clusterofs is invalid Syzbot generated a crafted image [1] with a non-compact HEAD index of clusterofs 33024 while valid numbers should be 0 ~ lclustersize-1, which causes the following unexpected behavior as below: BUG: unable to handle page fault for address: fffff52101a3fff9 #PF: supervisor read access in kernel mode #PF: error_code(0x0000) - not-present page PGD 23ffed067 P4D 23ffed067 PUD 0 Oops: 0000 [#1] PREEMPT SMP KASAN CPU: 1 PID: 4398 Comm: kworker/u5:1 Not tainted 6.3.0-rc6-syzkaller-g09a9639e56c0 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/30/2023 Workqueue: erofs_worker z_erofs_decompressqueue_work RIP: 0010:z_erofs_decompress_queue+0xb7e/0x2b40 ... Call Trace: z_erofs_decompressqueue_work+0x99/0xe0 process_one_work+0x8f6/0x1170 worker_thread+0xa63/0x1210 kthread+0x270/0x300 ret_from_fork+0x1f/0x30 Note that normal images or images using compact indexes are not impacted. Let's fix this now. [1] https://lore.kernel.org/r/000000000000ec75b005ee97fbaa@google.com",
    "evidence": "osv:CVE-2023-54132",
    "products": [
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          "evidence": "/affected/1/package/name"
        },
        "prerequisites": [],
        "fixed_versions": [
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            "evidence": "/affected/1/ranges"
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        "affected_versions": []
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    "severity": "high",
    "structured": {
      "id": "CVE-2023-54132",
      "aliases": [
        "CVE-2023-54132"
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      "metrics": [
        {
          "type": "CVSS_V3",
          "score": "CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H"
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      "modified": "2026-10-28T02:30:23.560010578Z",
      "provider": "osv",
      "references": [
        "https://git.kernel.org/stable/c/060fecf1114ff9fcfe87953fe8c4fc5048777160",
        "https://git.kernel.org/stable/c/7a4579cd6e4936de107c82499c3c9ee11b63401e",
        "https://git.kernel.org/stable/c/7ee7a86e28ce9ead7112286c388df8d254c373c6",
        "https://git.kernel.org/stable/c/880c79bdb002b9d5b6940e52c2ad3829c2178207",
        "https://git.kernel.org/stable/c/96a845419b3722869f09883319de4d55c44d9aef",
        "https://git.kernel.org/stable/c/cc4efd3dd2ac9f89143e5d881609747ecff04164",
        "https://git.kernel.org/stable/c/f01b2894928affa3339d355608713cf3db8360b8",
        "https://github.com/CVEProject/cvelistV5/tree/main/cves/2023/54xxx/CVE-2023-54132.json",
        "https://nvd.nist.gov/vuln/detail/CVE-2023-54132",
        "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"
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      "provider_metadata": {
        "cna_assigner": "Linux",
        "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2023/54xxx/CVE-2023-54132.json"
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        "evidence": "/id"
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    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
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  "source_id": "core-osv",
  "document_id": 490185,
  "published_at": "2025-12-24T13:06:49.03+00:00"
}