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GHSA-8WQH-FVW2-PQC7

Vulnerability from github – Published: 2026-08-15 06:32 – Updated: 2026-08-15 06:32
VLAI
Details

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

llc: fix SAP refcount leak in llc_ui_autobind()

llc_ui_autobind() opens a SAP after choosing a dynamic LSAP. llc_sap_open() returns a reference owned by the caller, and llc_sap_add_socket() takes a second reference for the socket's membership in the SAP hash tables.

llc_ui_bind() drops the caller's reference after adding the socket, but llc_ui_autobind() keeps it. When the socket is closed, llc_sap_remove_socket() releases only the socket reference, leaving the SAP on llc_sap_list with sk_count == 0.

This is user-visible because repeated autobind and close cycles can consume all dynamic SAP values and make later autobinds fail with -EUSERS.

Drop the caller's reference after a successful autobind, matching llc_ui_bind()'s ownership model.

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{
  "affected": [],
  "aliases": [
    "CVE-2026-72022"
  ],
  "database_specific": {
    "cwe_ids": [],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-08-15T06:21:01Z",
    "severity": null
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nllc: fix SAP refcount leak in llc_ui_autobind()\n\nllc_ui_autobind() opens a SAP after choosing a dynamic LSAP.\nllc_sap_open() returns a reference owned by the caller, and\nllc_sap_add_socket() takes a second reference for the socket\u0027s\nmembership in the SAP hash tables.\n\nllc_ui_bind() drops the caller\u0027s reference after adding the socket,\nbut llc_ui_autobind() keeps it. When the socket is closed,\nllc_sap_remove_socket() releases only the socket reference, leaving\nthe SAP on llc_sap_list with sk_count == 0.\n\nThis is user-visible because repeated autobind and close cycles can consume\nall dynamic SAP values and make later autobinds fail with -EUSERS.\n\nDrop the caller\u0027s reference after a successful autobind, matching\nllc_ui_bind()\u0027s ownership model.",
  "id": "GHSA-8wqh-fvw2-pqc7",
  "modified": "2026-08-15T06:32:09Z",
  "published": "2026-08-15T06:32:09Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-72022"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/21a537606fe35be2b85971a5fd35c0023b6ef98f"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/61a7ff4a62003b55a15022567486741b3bd83914"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/660667cd406648bbaffbd5c0d897c2263a852f11"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/79dc4b508e3f2649390a1f745f7657813e5938ec"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/a2f9fa31ae021ef1fdcaf3ab17bd49f9223dd6a4"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/b2fc9955ddc7c4ca03be44b995193bd6486c62e1"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/b589a965184dde49c43b8caf5bcc65715a7b4ef2"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/c7881b6088276601beaccb7440b8d56eab0d65ae"
    }
  ],
  "schema_version": "1.4.0",
  "severity": []
}



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