qlcnic: prevent ->dcb use-after-free on qlcnic_dcb_enable() failure

{
  "id": "db272151ad5885bb3e2769d9baae6863cd64632ffa0446528121f2a5c4817fc3",
  "url": "https://osv.dev/vulnerability/CVE-2022-50288",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "qlcnic: prevent ->dcb use-after-free on qlcnic_dcb_enable() failure",
    "summary": "In the Linux kernel, the following vulnerability has been resolved: qlcnic: prevent ->dcb use-after-free on qlcnic_dcb_enable() failure adapter->dcb would get silently freed inside qlcnic_dcb_enable() in case qlcnic_dcb_attach() would return an error, which always happens under OOM conditions. This would lead to use-after-free because both of the existing callers invoke qlcnic_dcb_get_info() on the obtained pointer, which is potentially freed at that point. Propagate errors from qlcnic_dcb_enable(), and instead free the dcb pointer at callsite using qlcnic_dcb_free(). This also removes the now unused qlcnic_clear_dcb_ops() helper, which was a simple wrapper around kfree() also causing memory leaks for partially initialized dcb. Found by Linux Verification Center (linuxtesting.org) with the SVACE static analysis tool.",
    "evidence": "osv:CVE-2022-50288",
    "products": [
      {
        "name": {
          "value": "Kernel",
          "evidence": "/affected/1/package/name"
        },
        "prerequisites": [],
        "fixed_versions": [
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            "evidence": "/affected/1/ranges"
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            "evidence": "/affected/1/ranges"
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            "evidence": "/affected/1/ranges"
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    ],
    "severity": "unknown",
    "structured": {
      "id": "CVE-2022-50288",
      "aliases": [
        "CVE-2022-50288"
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      "affected": [
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                  "fixed": "8f97eeb02a553cdc78c83a0596448a370e1518c4"
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            "ecosystem": "Linux"
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      ],
      "modified": "2026-10-28T02:30:23.792255246Z",
      "provider": "osv",
      "references": [
        "https://git.kernel.org/stable/c/13a7c8964afcd8ca43c0b6001ebb0127baa95362",
        "https://git.kernel.org/stable/c/36999236f0b12d5de21a6f40e93b570727b9ceb2",
        "https://git.kernel.org/stable/c/513787ff9a331b461115e8a145a983d650a84fcb",
        "https://git.kernel.org/stable/c/8df1dc04ce0e4c03b51a756749c250a9cb17d707",
        "https://git.kernel.org/stable/c/8f97eeb02a553cdc78c83a0596448a370e1518c4",
        "https://git.kernel.org/stable/c/95df720e64a6409d8152827a776c43f615e3321a",
        "https://git.kernel.org/stable/c/a2a694e6edbdb3efb34e1613a31fdcf6cf444a55",
        "https://git.kernel.org/stable/c/d12a7510293d3370b234b0b7c5eda33e58786768",
        "https://github.com/CVEProject/cvelistV5/tree/main/cves/2022/50xxx/CVE-2022-50288.json",
        "https://nvd.nist.gov/vuln/detail/CVE-2022-50288",
        "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/2022/50xxx/CVE-2022-50288.json"
      }
    },
    "related_cves": [
      {
        "value": "CVE-2022-50288",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": null
  },
  "source_id": "core-osv",
  "document_id": 489855,
  "published_at": "2025-09-15T14:21:24.427+00:00"
}