CVE-2025-38112 (GCVE-0-2025-38112)
Vulnerability from cvelistv5
Published
2025-07-03 08:35
Modified
2025-07-28 04:12
Severity ?
Summary
In the Linux kernel, the following vulnerability has been resolved: net: Fix TOCTOU issue in sk_is_readable() sk->sk_prot->sock_is_readable is a valid function pointer when sk resides in a sockmap. After the last sk_psock_put() (which usually happens when socket is removed from sockmap), sk->sk_prot gets restored and sk->sk_prot->sock_is_readable becomes NULL. This makes sk_is_readable() racy, if the value of sk->sk_prot is reloaded after the initial check. Which in turn may lead to a null pointer dereference. Ensure the function pointer does not turn NULL after the check.
References
Impacted products
Vendor Product Version
Linux Linux Version: 8934ce2fd08171e8605f7fada91ee7619fe17ab8
Version: 8934ce2fd08171e8605f7fada91ee7619fe17ab8
Version: 8934ce2fd08171e8605f7fada91ee7619fe17ab8
Version: 8934ce2fd08171e8605f7fada91ee7619fe17ab8
Version: 8934ce2fd08171e8605f7fada91ee7619fe17ab8
Version: 8934ce2fd08171e8605f7fada91ee7619fe17ab8
Version: 8934ce2fd08171e8605f7fada91ee7619fe17ab8
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{
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      ],
      "cpeApplicability": [
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          "nodes": [
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          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnet: Fix TOCTOU issue in sk_is_readable()\n\nsk-\u003esk_prot-\u003esock_is_readable is a valid function pointer when sk resides\nin a sockmap. After the last sk_psock_put() (which usually happens when\nsocket is removed from sockmap), sk-\u003esk_prot gets restored and\nsk-\u003esk_prot-\u003esock_is_readable becomes NULL.\n\nThis makes sk_is_readable() racy, if the value of sk-\u003esk_prot is reloaded\nafter the initial check. Which in turn may lead to a null pointer\ndereference.\n\nEnsure the function pointer does not turn NULL after the check."
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2025-07-28T04:12:29.484Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/c2b26638476baee154920bb587fc94ff1bf04336"
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        {
          "url": "https://git.kernel.org/stable/c/6fa68d7eab34d448a61aa24ea31e68b3231ed20d"
        },
        {
          "url": "https://git.kernel.org/stable/c/8926a7ef1977a832dd6bf702f1a99303dbf15b15"
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        {
          "url": "https://git.kernel.org/stable/c/ff55c85a923e043d59d26b20a673a1b4a219c310"
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          "url": "https://git.kernel.org/stable/c/1e0de7582ceccbdbb227d4e0ddf65732f92526da"
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        },
        {
          "url": "https://git.kernel.org/stable/c/2660a544fdc0940bba15f70508a46cf9a6491230"
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      "title": "net: Fix TOCTOU issue in sk_is_readable()",
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    "assignerShortName": "Linux",
    "cveId": "CVE-2025-38112",
    "datePublished": "2025-07-03T08:35:21.276Z",
    "dateReserved": "2025-04-16T04:51:23.985Z",
    "dateUpdated": "2025-07-28T04:12:29.484Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.1",
  "vulnerability-lookup:meta": {
    "nvd": "{\"cve\":{\"id\":\"CVE-2025-38112\",\"sourceIdentifier\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"published\":\"2025-07-03T09:15:24.960\",\"lastModified\":\"2025-07-03T15:13:53.147\",\"vulnStatus\":\"Awaiting Analysis\",\"cveTags\":[],\"descriptions\":[{\"lang\":\"en\",\"value\":\"In the Linux kernel, the following vulnerability has been resolved:\\n\\nnet: Fix TOCTOU issue in sk_is_readable()\\n\\nsk-\u003esk_prot-\u003esock_is_readable is a valid function pointer when sk resides\\nin a sockmap. After the last sk_psock_put() (which usually happens when\\nsocket is removed from sockmap), sk-\u003esk_prot gets restored and\\nsk-\u003esk_prot-\u003esock_is_readable becomes NULL.\\n\\nThis makes sk_is_readable() racy, if the value of sk-\u003esk_prot is reloaded\\nafter the initial check. Which in turn may lead to a null pointer\\ndereference.\\n\\nEnsure the function pointer does not turn NULL after the check.\"},{\"lang\":\"es\",\"value\":\"En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: net: Se solucion\u00f3 el problema de TOCTOU en sk_is_readable(). sk-\u0026gt;sk_prot-\u0026gt;sock_is_readable es un puntero a funci\u00f3n v\u00e1lido cuando sk reside en un mapa de sockets. Tras el \u00faltimo sk_psock_put() (que suele ocurrir al eliminar un socket de un mapa de sockets), sk-\u0026gt;sk_prot se restaura y sk-\u0026gt;sk_prot-\u0026gt;sock_is_readable se convierte en NULL. Esto hace que sk_is_readable() sea arriesgado si el valor de sk-\u0026gt;sk_prot se recarga despu\u00e9s de la comprobaci\u00f3n inicial. Esto, a su vez, puede provocar una desreferencia de puntero nulo. Aseg\u00farese de que el puntero a funci\u00f3n no se convierta en NULL despu\u00e9s de la comprobaci\u00f3n.\"}],\"metrics\":{},\"references\":[{\"url\":\"https://git.kernel.org/stable/c/1b367ba2f94251822577daed031d6b9a9e11ba91\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/1e0de7582ceccbdbb227d4e0ddf65732f92526da\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/2660a544fdc0940bba15f70508a46cf9a6491230\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/6fa68d7eab34d448a61aa24ea31e68b3231ed20d\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/8926a7ef1977a832dd6bf702f1a99303dbf15b15\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/c2b26638476baee154920bb587fc94ff1bf04336\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/ff55c85a923e043d59d26b20a673a1b4a219c310\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"}]}}"
  }
}


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