ghsa-8fmx-5gmc-pfcw
Vulnerability from github
Published
2025-05-01 15:31
Modified
2025-05-01 15:31
Details

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

net/smc: Fix possible leaked pernet namespace in smc_init()

In smc_init(), register_pernet_subsys(&smc_net_stat_ops) is called without any error handling. If it fails, registering of &smc_net_ops won't be reverted. And if smc_nl_init() fails, &smc_net_stat_ops itself won't be reverted.

This leaves wild ops in subsystem linkedlist and when another module tries to call register_pernet_operations() it triggers page fault:

BUG: unable to handle page fault for address: fffffbfff81b964c RIP: 0010:register_pernet_operations+0x1b9/0x5f0 Call Trace: register_pernet_subsys+0x29/0x40 ebtables_init+0x58/0x1000 [ebtables] ...

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{
  "affected": [],
  "aliases": [
    "CVE-2022-49905"
  ],
  "database_specific": {
    "cwe_ids": [],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2025-05-01T15:16:15Z",
    "severity": null
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nnet/smc: Fix possible leaked pernet namespace in smc_init()\n\nIn smc_init(), register_pernet_subsys(\u0026smc_net_stat_ops) is called\nwithout any error handling.\nIf it fails, registering of \u0026smc_net_ops won\u0027t be reverted.\nAnd if smc_nl_init() fails, \u0026smc_net_stat_ops itself won\u0027t be reverted.\n\nThis leaves wild ops in subsystem linkedlist and when another module\ntries to call register_pernet_operations() it triggers page fault:\n\nBUG: unable to handle page fault for address: fffffbfff81b964c\nRIP: 0010:register_pernet_operations+0x1b9/0x5f0\nCall Trace:\n  \u003cTASK\u003e\n  register_pernet_subsys+0x29/0x40\n  ebtables_init+0x58/0x1000 [ebtables]\n  ...",
  "id": "GHSA-8fmx-5gmc-pfcw",
  "modified": "2025-05-01T15:31:52Z",
  "published": "2025-05-01T15:31:52Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2022-49905"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/61defd6450a9ef4a1487090449999b0fd83518ef"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/62ff373da2534534c55debe6c724c7fe14adb97f"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/c97daf836f7caf81d3144b8cd2b2a51f9bc3bd09"
    }
  ],
  "schema_version": "1.4.0",
  "severity": []
}


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