CVE-2022-49957 (GCVE-0-2022-49957)
Vulnerability from cvelistv5
Published
2025-06-18 11:00
Modified
2025-06-18 11:00
Severity ?
Summary
In the Linux kernel, the following vulnerability has been resolved: kcm: fix strp_init() order and cleanup strp_init() is called just a few lines above this csk->sk_user_data check, it also initializes strp->work etc., therefore, it is unnecessary to call strp_done() to cancel the freshly initialized work. And if sk_user_data is already used by KCM, psock->strp should not be touched, particularly strp->work state, so we need to move strp_init() after the csk->sk_user_data check. This also makes a lockdep warning reported by syzbot go away.
References
Impacted products
Vendor Product Version
Linux Linux Version: 44890e9ff771ef11777b2d1ebf8589255eb12502
Version: e5571240236c5652f3e079b1d5866716a7ad819c
Version: e5571240236c5652f3e079b1d5866716a7ad819c
Version: e5571240236c5652f3e079b1d5866716a7ad819c
Version: e5571240236c5652f3e079b1d5866716a7ad819c
Version: e5571240236c5652f3e079b1d5866716a7ad819c
Version: e5571240236c5652f3e079b1d5866716a7ad819c
Version: 085cbbda4b4cc7dd2ba63806346881c2c2e10107
Version: 383250363daf01eb7aa3728c09ef8a4f6d8a3252
Version: 19042316b9e12c93bf334a04d4dd7a4e846c7311
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{
  "containers": {
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          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "net/kcm/kcmsock.c"
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          "vendor": "Linux",
          "versions": [
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              "version": "0",
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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\nkcm: fix strp_init() order and cleanup\n\nstrp_init() is called just a few lines above this csk-\u003esk_user_data\ncheck, it also initializes strp-\u003ework etc., therefore, it is\nunnecessary to call strp_done() to cancel the freshly initialized\nwork.\n\nAnd if sk_user_data is already used by KCM, psock-\u003estrp should not be\ntouched, particularly strp-\u003ework state, so we need to move strp_init()\nafter the csk-\u003esk_user_data check.\n\nThis also makes a lockdep warning reported by syzbot go away."
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2025-06-18T11:00:19.238Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/473f394953216614087f4179e55cdf0cf616a13b"
        },
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          "url": "https://git.kernel.org/stable/c/a8a0c321319ad64a5427d6172cd9c23b4d6ca1e8"
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        {
          "url": "https://git.kernel.org/stable/c/8fc29ff3910f3af08a7c40a75d436b5720efe2bf"
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      ],
      "title": "kcm: fix strp_init() order and cleanup",
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  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2022-49957",
    "datePublished": "2025-06-18T11:00:19.238Z",
    "dateReserved": "2025-06-18T10:57:27.382Z",
    "dateUpdated": "2025-06-18T11:00:19.238Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.1",
  "vulnerability-lookup:meta": {
    "nvd": "{\"cve\":{\"id\":\"CVE-2022-49957\",\"sourceIdentifier\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"published\":\"2025-06-18T11:15:22.897\",\"lastModified\":\"2025-06-18T13:46:52.973\",\"vulnStatus\":\"Awaiting Analysis\",\"cveTags\":[],\"descriptions\":[{\"lang\":\"en\",\"value\":\"In the Linux kernel, the following vulnerability has been resolved:\\n\\nkcm: fix strp_init() order and cleanup\\n\\nstrp_init() is called just a few lines above this csk-\u003esk_user_data\\ncheck, it also initializes strp-\u003ework etc., therefore, it is\\nunnecessary to call strp_done() to cancel the freshly initialized\\nwork.\\n\\nAnd if sk_user_data is already used by KCM, psock-\u003estrp should not be\\ntouched, particularly strp-\u003ework state, so we need to move strp_init()\\nafter the csk-\u003esk_user_data check.\\n\\nThis also makes a lockdep warning reported by syzbot go away.\"},{\"lang\":\"es\",\"value\":\"En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: kcm: correcci\u00f3n del orden y la limpieza de strp_init(). strp_init() se llama solo unas l\u00edneas por encima de la comprobaci\u00f3n csk-\u0026gt;sk_user_data; tambi\u00e9n inicializa strp-\u0026gt;work, etc., por lo que no es necesario llamar a strp_done() para cancelar el trabajo reci\u00e9n inicializado. Si KCM ya utiliza sk_user_data, no se debe modificar psock-\u0026gt;strp, en particular el estado strp-\u0026gt;work, por lo que es necesario mover strp_init() despu\u00e9s de la comprobaci\u00f3n csk-\u0026gt;sk_user_data. Esto tambi\u00e9n elimina la advertencia de lockdep reportada por syzbot.\"}],\"metrics\":{},\"references\":[{\"url\":\"https://git.kernel.org/stable/c/0946ff31d1a8778787bf6708beb20f38715267cc\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/1b6666964ca1de93a7bf06e122bcf3616dbd33a9\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/473f394953216614087f4179e55cdf0cf616a13b\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/55fb8c3baa8071c5d533a9ad48624e44e2a04ef5\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/8fc29ff3910f3af08a7c40a75d436b5720efe2bf\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/a8a0c321319ad64a5427d6172cd9c23b4d6ca1e8\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/f865976baa85915c7672f351b74d5974b93215f6\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"}]}}"
  }
}


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