{
  "schema_version": "1.6.1",
  "id": "RPI-CVE-2025-21810",
  "modified": "2026-10-07T17:22:01Z",
  "upstream": [
    "CVE-2025-21810"
  ],
  "published": "2025-02-27T20:00:18Z",
  "summary": "driver core: class: Fix wild pointer dereferences in API class_dev_iter_next()",
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\ndriver core: class: Fix wild pointer dereferences in API class_dev_iter_next()\n\nThere are a potential wild pointer dereferences issue regarding APIs\nclass_dev_iter_(init|next|exit)(), as explained by below typical usage:\n\n// All members of @iter are wild pointers.\nstruct class_dev_iter iter;\n\n// class_dev_iter_init(@iter, @class, ...) checks parameter @class for\n// potential class_to_subsys() error, and it returns void type and does\n// not initialize its output parameter @iter, so caller can not detect\n// the error and continues to invoke class_dev_iter_next(@iter) even if\n// @iter still contains wild pointers.\nclass_dev_iter_init(&iter, ...);\n\n// Dereference these wild pointers in @iter here once suffer the error.\nwhile (dev = class_dev_iter_next(&iter)) { ... };\n\n// Also dereference these wild pointers here.\nclass_dev_iter_exit(&iter);\n\nActually, all callers of these APIs have such usage pattern in kernel tree.\nFix by:\n- Initialize output parameter @iter by memset() in class_dev_iter_init()\n  and give callers prompt by pr_crit() for the error.\n- Check if @iter is valid in class_dev_iter_next().",
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  "references": [
    {
      "type": "ADVISORY",
      "url": "https://www.cve.org/CVERecord?id=CVE-2025-21810"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/f4b9bc823b0cfdebfed479c0e87d6939c7562e87"
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      "url": "https://git.kernel.org/stable/c/1614e75d1a1b63db6421c7a4bf37004720c7376c"
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      "url": "https://git.kernel.org/stable/c/5c504e9767b947cf7d4e29b811c0c8b3c53242b7"
    },
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      "url": "https://git.kernel.org/stable/c/e128f82f7006991c99a58114f70ef61e937b1ac1"
    }
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    "source": "https://git.kernel.org/pub/scm/linux/security/vulns.git",
    "upstream_modified": "2026-08-05T12:19:11Z"
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}