sfc: fix crash when reading stats while NIC is resetting

{
  "id": "09a852619b785f99926c65080ad4a058c64ac1472d9349623f2e7e6c107a23d8",
  "url": "https://osv.dev/vulnerability/CVE-2023-54156",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "sfc: fix crash when reading stats while NIC is resetting",
    "summary": "In the Linux kernel, the following vulnerability has been resolved: sfc: fix crash when reading stats while NIC is resetting efx_net_stats() (.ndo_get_stats64) can be called during an ethtool selftest, during which time nic_data->mc_stats is NULL as the NIC has been fini'd. In this case do not attempt to fetch the latest stats from the hardware, else we will crash on a NULL dereference: BUG: kernel NULL pointer dereference, address: 0000000000000038 RIP efx_nic_update_stats abridged calltrace: efx_ef10_update_stats_pf efx_net_stats dev_get_stats dev_seq_printf_stats Skipping the read is safe, we will simply give out stale stats. To ensure that the free in efx_ef10_fini_nic() does not race against efx_ef10_update_stats_pf(), which could cause a TOCTTOU bug, take the efx->stats_lock in fini_nic (it is already held across update_stats).",
    "evidence": "osv:CVE-2023-54156",
    "products": [
      {
        "name": {
          "value": "Kernel",
          "evidence": "/affected/1/package/name"
        },
        "prerequisites": [],
        "fixed_versions": [
          {
            "value": "5.10.188",
            "evidence": "/affected/1/ranges"
          },
          {
            "value": "5.15.121",
            "evidence": "/affected/1/ranges"
          },
          {
            "value": "6.1.39",
            "evidence": "/affected/1/ranges"
          },
          {
            "value": "6.3.13",
            "evidence": "/affected/1/ranges"
          },
          {
            "value": "6.4.4",
            "evidence": "/affected/1/ranges"
          }
        ],
        "affected_versions": []
      }
    ],
    "severity": "high",
    "structured": {
      "id": "CVE-2023-54156",
      "aliases": [
        "CVE-2023-54156"
      ],
      "metrics": [
        {
          "type": "CVSS_V3",
          "score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H"
        }
      ],
      "affected": [
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                  "fixed": "446f5567934331923d0aec4ce045e4ecb0174aae"
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                  "fixed": "470152d76b3ed107d172ea46acc4bfa941f20b4b"
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                  "fixed": "aba32b4c58112960c0c708703ca6b44dc8944082"
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              "type": "ECOSYSTEM",
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          "package": {
            "name": "Kernel",
            "ecosystem": "Linux"
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          "database_specific": {
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      ],
      "modified": "2026-10-28T02:30:39.267044363Z",
      "provider": "osv",
      "references": [
        "https://git.kernel.org/stable/c/446f5567934331923d0aec4ce045e4ecb0174aae",
        "https://git.kernel.org/stable/c/470152d76b3ed107d172ea46acc4bfa941f20b4b",
        "https://git.kernel.org/stable/c/91f4ef204e731565afdc6c2a7fcf509a3fd6fd67",
        "https://git.kernel.org/stable/c/aba32b4c58112960c0c708703ca6b44dc8944082",
        "https://git.kernel.org/stable/c/cb1aa7cc562cab6a87ea33574c8c65f2d2fd7aeb",
        "https://git.kernel.org/stable/c/d1b355438b8325a486f087e506d412c4e852f37b",
        "https://github.com/CVEProject/cvelistV5/tree/main/cves/2023/54xxx/CVE-2023-54156.json",
        "https://nvd.nist.gov/vuln/detail/CVE-2023-54156",
        "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/2023/54xxx/CVE-2023-54156.json"
      }
    },
    "related_cves": [
      {
        "value": "CVE-2023-54156",
        "evidence": "/id"
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    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 506414,
  "published_at": "2025-12-24T13:07:06.043+00:00"
}