CVE-2026-72022 (GCVE-0-2026-72022)
Vulnerability from cvelistv5
Published
2026-08-15 05:51
Modified
2026-08-17 05:06
Severity ?
Summary
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.
References
Impacted products
Vendor Product Version
Linux Linux Version: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2
Version: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2
Version: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2
Version: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2
Version: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2
Version: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2
Version: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2
Version: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2
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{
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      "cpeApplicability": [
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              "operator": "OR"
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      "descriptions": [
        {
          "lang": "en",
          "value": "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."
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-08-17T05:06:45.278Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/79dc4b508e3f2649390a1f745f7657813e5938ec"
        },
        {
          "url": "https://git.kernel.org/stable/c/a2f9fa31ae021ef1fdcaf3ab17bd49f9223dd6a4"
        },
        {
          "url": "https://git.kernel.org/stable/c/b589a965184dde49c43b8caf5bcc65715a7b4ef2"
        },
        {
          "url": "https://git.kernel.org/stable/c/c7881b6088276601beaccb7440b8d56eab0d65ae"
        },
        {
          "url": "https://git.kernel.org/stable/c/b2fc9955ddc7c4ca03be44b995193bd6486c62e1"
        },
        {
          "url": "https://git.kernel.org/stable/c/61a7ff4a62003b55a15022567486741b3bd83914"
        },
        {
          "url": "https://git.kernel.org/stable/c/21a537606fe35be2b85971a5fd35c0023b6ef98f"
        },
        {
          "url": "https://git.kernel.org/stable/c/660667cd406648bbaffbd5c0d897c2263a852f11"
        }
      ],
      "title": "llc: fix SAP refcount leak in llc_ui_autobind()",
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  "cveMetadata": {
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    "assignerShortName": "Linux",
    "cveId": "CVE-2026-72022",
    "datePublished": "2026-08-15T05:51:47.978Z",
    "dateReserved": "2026-08-09T03:40:39.900Z",
    "dateUpdated": "2026-08-17T05:06:45.278Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}


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