mfd: cros_ec: Delay dev_set_drvdata() until probe success

{
  "id": "a7f2d0b7a41221e15920d6f2e1eba81af661d043686f5e3c9360849761d67100",
  "url": "https://osv.dev/vulnerability/CVE-2026-64420",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "mfd: cros_ec: Delay dev_set_drvdata() until probe success",
    "summary": "In the Linux kernel, the following vulnerability has been resolved: mfd: cros_ec: Delay dev_set_drvdata() until probe success If ec_device_probe() fails, cros_ec_class_release releases memory for the cros_ec_dev structure. However, because the drvdata was already set, sub-drivers like cros_ec_typec can still retrieve the stale pointer via the platform device. This leads to a use-after-free when cros_ec_typec attempts to access &typec->ec->ec->dev on a device that has already been released. Move dev_set_drvdata() to ensure that the pointer is only made available once all initialization steps have succeeded. sysfs: cannot create duplicate filename '/class/chromeos/cros_ec' Call trace: sysfs_do_create_link_sd+0x94/0xdc sysfs_create_link+0x30/0x44 device_add_class_symlinks+0x90/0x13c device_add+0xf0/0x50c ec_device_probe+0x150/0x4f0 platform_probe+0xa0/0xe0 ... BUG: KASAN: invalid-access in __memcpy+0x44/0x230 Write at addr f5ffff809e2d33ac by task kworker/u32:5/125 Pointer tag: [f5], memory tag: [fe] Tainted : [W]=WARN, [O]=OOT_MODULE Hardware name: Google Navi unprovisioned 0x7FFFFFFF/sku0 board/sku3 Workqueue: events_unbound deferred_probe_work_func Call trace: __memcpy+0x44/0x230 cros_ec_check_features+0x60/0xcc [cros_ec_proto] cros_typec_probe+0xe8/0x6e0 [cros_ec_typec] platform_probe+0xa0/0xe0",
    "evidence": "osv:CVE-2026-64420",
    "products": [
      {
        "name": {
          "value": "Kernel",
          "evidence": "/affected/1/package/name"
        },
        "prerequisites": [],
        "fixed_versions": [
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            "value": "5.10.261",
            "evidence": "/affected/1/ranges"
          },
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            "value": "5.15.212",
            "evidence": "/affected/1/ranges"
          },
          {
            "value": "6.1.178",
            "evidence": "/affected/1/ranges"
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          },
          {
            "value": "7.1.4",
            "evidence": "/affected/1/ranges"
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        "affected_versions": []
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    ],
    "severity": "high",
    "structured": {
      "id": "CVE-2026-64420",
      "aliases": [
        "CVE-2026-64420"
      ],
      "metrics": [
        {
          "type": "CVSS_V3",
          "score": "CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H"
        }
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      "affected": [
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              "type": "ECOSYSTEM",
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                  "introduced": "4.12.0"
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            "ecosystem": "Linux"
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      "modified": "2026-10-28T02:30:22.889400309Z",
      "provider": "osv",
      "references": [
        "https://git.kernel.org/stable/c/24522713034d521ea4b5f5f36342e2b2f7e73bd6",
        "https://git.kernel.org/stable/c/257203d83204b192d1265a916b42ca0d499bb117",
        "https://git.kernel.org/stable/c/729ae27dc2503a7c1f92da1859efb45da03e4fa0",
        "https://git.kernel.org/stable/c/8b2c1d41bc36c100b38ce5ee6def246c527eaf8a",
        "https://git.kernel.org/stable/c/b5f41d5bf08e7b1b14fa0bd640975e6d78dc006d",
        "https://git.kernel.org/stable/c/ed2941e5db016a0c600b25f1972620e6e223d9fa",
        "https://git.kernel.org/stable/c/f7e81dc181d9fe8ab977158042cd193e8cc12091",
        "https://git.kernel.org/stable/c/fc030c5b116f668d4ca86dca63742ddbc98d1665",
        "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/64xxx/CVE-2026-64420.json",
        "https://nvd.nist.gov/vuln/detail/CVE-2026-64420",
        "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/2026/64xxx/CVE-2026-64420.json"
      }
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    "related_cves": [
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        "value": "CVE-2026-64420",
        "evidence": "/id"
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    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 489302,
  "published_at": "2026-07-25T08:50:59.115+00:00"
}