GHSA-Q35C-R5M8-JM6Q

Vulnerability from github – Published: 2026-09-17 18:31 – Updated: 2026-09-17 18:31
VLAI
Details

In the Linux kernel, the following vulnerability has been resolved:

RDMA/cxgb4: Free debugfs on registration failure

c4iw_alloc() creates the per-device debugfs tree (dev->debugfs_root via setup_debugfs()), but it is removed only in c4iw_remove(), not in c4iw_dealloc(). When RDMA device registration fails, the registration worker's err_dealloc_ctx path calls c4iw_dealloc() directly, bypassing c4iw_remove(), so the debugfs dentries leak and outlive the freed c4iw_dev.

Move debugfs_remove_recursive() into c4iw_dealloc() so every path that frees ctx->dev also removes its debugfs tree.

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{
  "affected": [],
  "aliases": [
    "CVE-2026-90219"
  ],
  "database_specific": {
    "cwe_ids": [],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-09-17T17:17:17Z",
    "severity": null
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nRDMA/cxgb4: Free debugfs on registration failure\n\nc4iw_alloc() creates the per-device debugfs tree (dev-\u003edebugfs_root via\nsetup_debugfs()), but it is removed only in c4iw_remove(), not in\nc4iw_dealloc().  When RDMA device registration fails, the registration\nworker\u0027s err_dealloc_ctx path calls c4iw_dealloc() directly, bypassing\nc4iw_remove(), so the debugfs dentries leak and outlive the freed\nc4iw_dev.\n\nMove debugfs_remove_recursive() into c4iw_dealloc() so every path that\nfrees ctx-\u003edev also removes its debugfs tree.",
  "id": "GHSA-q35c-r5m8-jm6q",
  "modified": "2026-09-17T18:31:56Z",
  "published": "2026-09-17T18:31:56Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-90219"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/046425412529dbfca1433c8bef5641b271b4ab2a"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/459b59f7ed56511d6529311cb4e5e482ebfcfb8e"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/479a7f90060e62bdd9bb4036ec0a70bf460f6d23"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/c332d9e7dce234d8bef78271d003a68ee943b61b"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/cd60992f09b7e83bfd3c76e3bb06b29f3e2fa0a8"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/ea41b5630fa3d9877ce9ed8832cf5575f742bfbb"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/f98e894ec029a752cf9c7f7834741bead0fb463d"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/fe5c16bb6252dea6025b748257ddc3b2665495b0"
    }
  ],
  "schema_version": "1.4.0",
  "severity": []
}



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