CVE-2026-22994 (GCVE-0-2026-22994)
Vulnerability from cvelistv5
Published
2026-01-23 15:24
Modified
2026-02-09 08:36
Severity ?
Summary
In the Linux kernel, the following vulnerability has been resolved: bpf: Fix reference count leak in bpf_prog_test_run_xdp() syzbot is reporting unregister_netdevice: waiting for sit0 to become free. Usage count = 2 problem. A debug printk() patch found that a refcount is obtained at xdp_convert_md_to_buff() from bpf_prog_test_run_xdp(). According to commit ec94670fcb3b ("bpf: Support specifying ingress via xdp_md context in BPF_PROG_TEST_RUN"), the refcount obtained by xdp_convert_md_to_buff() will be released by xdp_convert_buff_to_md(). Therefore, we can consider that the error handling path introduced by commit 1c1949982524 ("bpf: introduce frags support to bpf_prog_test_run_xdp()") forgot to call xdp_convert_buff_to_md().
References
Impacted products
Vendor Product Version
Linux Linux Version: 1c194998252469cad00a08bd9ef0b99fd255c260
Version: 1c194998252469cad00a08bd9ef0b99fd255c260
Version: 1c194998252469cad00a08bd9ef0b99fd255c260
Version: 1c194998252469cad00a08bd9ef0b99fd255c260
Version: 1c194998252469cad00a08bd9ef0b99fd255c260
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{
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          "programFiles": [
            "net/bpf/test_run.c"
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      "cpeApplicability": [
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              "negate": false,
              "operator": "OR"
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      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nbpf: Fix reference count leak in bpf_prog_test_run_xdp()\n\nsyzbot is reporting\n\n  unregister_netdevice: waiting for sit0 to become free. Usage count = 2\n\nproblem. A debug printk() patch found that a refcount is obtained at\nxdp_convert_md_to_buff() from bpf_prog_test_run_xdp().\n\nAccording to commit ec94670fcb3b (\"bpf: Support specifying ingress via\nxdp_md context in BPF_PROG_TEST_RUN\"), the refcount obtained by\nxdp_convert_md_to_buff() will be released by xdp_convert_buff_to_md().\n\nTherefore, we can consider that the error handling path introduced by\ncommit 1c1949982524 (\"bpf: introduce frags support to\nbpf_prog_test_run_xdp()\") forgot to call xdp_convert_buff_to_md()."
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-02-09T08:36:45.690Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/368569bc546d3368ee9980ba79fc42fdff9a3365"
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        {
          "url": "https://git.kernel.org/stable/c/98676ee71fd4eafeb8be63c7f3f1905d40e03101"
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        },
        {
          "url": "https://git.kernel.org/stable/c/ec69daabe45256f98ac86c651b8ad1b2574489a7"
        }
      ],
      "title": "bpf: Fix reference count leak in bpf_prog_test_run_xdp()",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2026-22994",
    "datePublished": "2026-01-23T15:24:14.749Z",
    "dateReserved": "2026-01-13T15:37:45.937Z",
    "dateUpdated": "2026-02-09T08:36:45.690Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}


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