libnvdimm/labels: Fix divide error in nd_label_data_init()

{
  "id": "2747b1f7e1420413432f0588a9355833869fd63ea52a07e6b96788d54f7cfc8b",
  "url": "https://osv.dev/vulnerability/CVE-2025-38072",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "libnvdimm/labels: Fix divide error in nd_label_data_init()",
    "summary": "In the Linux kernel, the following vulnerability has been resolved: libnvdimm/labels: Fix divide error in nd_label_data_init() If a faulty CXL memory device returns a broken zero LSA size in its memory device information (Identify Memory Device (Opcode 4000h), CXL spec. 3.1, 8.2.9.9.1.1), a divide error occurs in the libnvdimm driver: Oops: divide error: 0000 [#1] PREEMPT SMP NOPTI RIP: 0010:nd_label_data_init+0x10e/0x800 [libnvdimm] Code and flow: 1) CXL Command 4000h returns LSA size = 0 2) config_size is assigned to zero LSA size (CXL pmem driver): drivers/cxl/pmem.c: .config_size = mds->lsa_size, 3) max_xfer is set to zero (nvdimm driver): drivers/nvdimm/label.c: max_xfer = min_t(size_t, ndd->nsarea.max_xfer, config_size); 4) A subsequent DIV_ROUND_UP() causes a division by zero: drivers/nvdimm/label.c: /* Make our initial read size a multiple of max_xfer size */ drivers/nvdimm/label.c: read_size = min(DIV_ROUND_UP(read_size, max_xfer) * max_xfer, drivers/nvdimm/label.c- config_size); Fix this by checking the config size parameter by extending an existing check.",
    "evidence": "osv:CVE-2025-38072",
    "products": [
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          "value": "Kernel",
          "evidence": "/affected/1/package/name"
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        "prerequisites": [],
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    "severity": "unknown",
    "structured": {
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      "aliases": [
        "CVE-2025-38072"
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      "modified": "2026-10-28T02:30:39.508327022Z",
      "provider": "osv",
      "references": [
        "https://git.kernel.org/stable/c/1d1e1efad1cf049e888bf175a5c6be85d792620c",
        "https://git.kernel.org/stable/c/2bd4a938d2eda96ab7288b8fa5aae84a1de8c4ca",
        "https://git.kernel.org/stable/c/396c46d3f59a18ebcc500640e749f16e197d472b",
        "https://git.kernel.org/stable/c/db1aef51b8e66a77f76b1250b914589c31a0a0ed",
        "https://git.kernel.org/stable/c/e14347f647ca6d76fe1509b6703e340f2d5e2716",
        "https://git.kernel.org/stable/c/ea3d95e05e97ea20fd6513f647393add16fce3b2",
        "https://git.kernel.org/stable/c/ef1d3455bbc1922f94a91ed58d3d7db440652959",
        "https://git.kernel.org/stable/c/f49c337037df029440a8390380dd35d2cf5924d3",
        "https://lists.debian.org/debian-lts-announce/2025/10/msg00007.html",
        "https://lists.debian.org/debian-lts-announce/2025/10/msg00008.html",
        "https://github.com/CVEProject/cvelistV5/tree/main/cves/2025/38xxx/CVE-2025-38072.json",
        "https://nvd.nist.gov/vuln/detail/CVE-2025-38072",
        "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"
      ],
      "provider_metadata": {
        "cna_assigner": "Linux",
        "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2025/38xxx/CVE-2025-38072.json"
      }
    },
    "related_cves": [
      {
        "value": "CVE-2025-38072",
        "evidence": "/id"
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    "security_relevant": true,
    "severity_evidence": null
  },
  "source_id": "core-osv",
  "document_id": 506940,
  "published_at": "2025-06-18T09:33:48.666+00:00"
}