CVE-2025-38546 (GCVE-0-2025-38546)
Vulnerability from cvelistv5
Published
2025-08-16 11:22
Modified
2025-08-16 11:22
Severity ?
Summary
In the Linux kernel, the following vulnerability has been resolved: atm: clip: Fix memory leak of struct clip_vcc. ioctl(ATMARP_MKIP) allocates struct clip_vcc and set it to vcc->user_back. The code assumes that vcc_destroy_socket() passes NULL skb to vcc->push() when the socket is close()d, and then clip_push() frees clip_vcc. However, ioctl(ATMARPD_CTRL) sets NULL to vcc->push() in atm_init_atmarp(), resulting in memory leak. Let's serialise two ioctl() by lock_sock() and check vcc->push() in atm_init_atmarp() to prevent memleak.
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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          "programFiles": [
            "net/atm/clip.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\natm: clip: Fix memory leak of struct clip_vcc.\n\nioctl(ATMARP_MKIP) allocates struct clip_vcc and set it to\nvcc-\u003euser_back.\n\nThe code assumes that vcc_destroy_socket() passes NULL skb\nto vcc-\u003epush() when the socket is close()d, and then clip_push()\nfrees clip_vcc.\n\nHowever, ioctl(ATMARPD_CTRL) sets NULL to vcc-\u003epush() in\natm_init_atmarp(), resulting in memory leak.\n\nLet\u0027s serialise two ioctl() by lock_sock() and check vcc-\u003epush()\nin atm_init_atmarp() to prevent memleak."
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2025-08-16T11:22:20.477Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/2fb37ab3226606cbfc9b2b6f9e301b0b735734c5"
        },
        {
          "url": "https://git.kernel.org/stable/c/9e4dbeee56f614e3f1e166e5d0655a999ea185ef"
        },
        {
          "url": "https://git.kernel.org/stable/c/1c075e88d5859a2c6b43b27e0e46fb281cef8039"
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          "url": "https://git.kernel.org/stable/c/0c17ff462d98c997d707ee5cf4e4a9b1b52b9d90"
        },
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          "url": "https://git.kernel.org/stable/c/1fb9fb5a4b5cec2d56e26525ef8c519de858fa60"
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          "url": "https://git.kernel.org/stable/c/cb2e4a2f8f268d8fba6662f663a2e57846f14a8d"
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        {
          "url": "https://git.kernel.org/stable/c/62dba28275a9a3104d4e33595c7b3328d4032d8d"
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      ],
      "title": "atm: clip: Fix memory leak of struct clip_vcc.",
      "x_generator": {
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  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2025-38546",
    "datePublished": "2025-08-16T11:22:20.477Z",
    "dateReserved": "2025-04-16T04:51:24.024Z",
    "dateUpdated": "2025-08-16T11:22:20.477Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.1",
  "vulnerability-lookup:meta": {
    "nvd": "{\"cve\":{\"id\":\"CVE-2025-38546\",\"sourceIdentifier\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"published\":\"2025-08-16T12:15:30.620\",\"lastModified\":\"2025-08-16T12:15:30.620\",\"vulnStatus\":\"Received\",\"cveTags\":[],\"descriptions\":[{\"lang\":\"en\",\"value\":\"In the Linux kernel, the following vulnerability has been resolved:\\n\\natm: clip: Fix memory leak of struct clip_vcc.\\n\\nioctl(ATMARP_MKIP) allocates struct clip_vcc and set it to\\nvcc-\u003euser_back.\\n\\nThe code assumes that vcc_destroy_socket() passes NULL skb\\nto vcc-\u003epush() when the socket is close()d, and then clip_push()\\nfrees clip_vcc.\\n\\nHowever, ioctl(ATMARPD_CTRL) sets NULL to vcc-\u003epush() in\\natm_init_atmarp(), resulting in memory leak.\\n\\nLet\u0027s serialise two ioctl() by lock_sock() and check vcc-\u003epush()\\nin atm_init_atmarp() to prevent memleak.\"}],\"metrics\":{},\"references\":[{\"url\":\"https://git.kernel.org/stable/c/0c17ff462d98c997d707ee5cf4e4a9b1b52b9d90\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/1c075e88d5859a2c6b43b27e0e46fb281cef8039\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/1fb9fb5a4b5cec2d56e26525ef8c519de858fa60\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/2fb37ab3226606cbfc9b2b6f9e301b0b735734c5\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/62dba28275a9a3104d4e33595c7b3328d4032d8d\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/9e4dbeee56f614e3f1e166e5d0655a999ea185ef\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/9f771816f14da6d6157a8c30069091abf6b566fb\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/cb2e4a2f8f268d8fba6662f663a2e57846f14a8d\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"}]}}"
  }
}


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