CVE-2025-38546 (GCVE-0-2025-38546)

Vulnerability from cvelistv5 – Published: 2025-08-16 11:22 – Updated: 2025-11-03 17:39
VLAI?
Title
atm: clip: Fix memory leak of struct clip_vcc.
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.
Severity ?
No CVSS data available.
Assigner
References
Impacted products
Vendor Product Version
Linux Linux Affected: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 , < 2fb37ab3226606cbfc9b2b6f9e301b0b735734c5 (git)
Affected: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 , < 9e4dbeee56f614e3f1e166e5d0655a999ea185ef (git)
Affected: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 , < 1c075e88d5859a2c6b43b27e0e46fb281cef8039 (git)
Affected: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 , < 0c17ff462d98c997d707ee5cf4e4a9b1b52b9d90 (git)
Affected: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 , < 1fb9fb5a4b5cec2d56e26525ef8c519de858fa60 (git)
Affected: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 , < 9f771816f14da6d6157a8c30069091abf6b566fb (git)
Affected: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 , < cb2e4a2f8f268d8fba6662f663a2e57846f14a8d (git)
Affected: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 , < 62dba28275a9a3104d4e33595c7b3328d4032d8d (git)
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    Linux Linux Affected: 2.6.12
Unaffected: 0 , < 2.6.12 (semver)
Unaffected: 5.4.296 , ≤ 5.4.* (semver)
Unaffected: 5.10.240 , ≤ 5.10.* (semver)
Unaffected: 5.15.189 , ≤ 5.15.* (semver)
Unaffected: 6.1.146 , ≤ 6.1.* (semver)
Unaffected: 6.6.99 , ≤ 6.6.* (semver)
Unaffected: 6.12.39 , ≤ 6.12.* (semver)
Unaffected: 6.15.7 , ≤ 6.15.* (semver)
Unaffected: 6.16 , ≤ * (original_commit_for_fix)
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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."
        }
      ],
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        "dateUpdated": "2025-08-16T11:22:20.477Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
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          "url": "https://git.kernel.org/stable/c/2fb37ab3226606cbfc9b2b6f9e301b0b735734c5"
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        {
          "url": "https://git.kernel.org/stable/c/9e4dbeee56f614e3f1e166e5d0655a999ea185ef"
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        {
          "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/cb2e4a2f8f268d8fba6662f663a2e57846f14a8d"
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        {
          "url": "https://git.kernel.org/stable/c/62dba28275a9a3104d4e33595c7b3328d4032d8d"
        }
      ],
      "title": "atm: clip: Fix memory leak of struct clip_vcc.",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
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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": "2025-11-03T17:39:40.981Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}


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