GHSA-VVP3-76JQ-Q4C4

Vulnerability from github – Published: 2025-07-25 18:30 – Updated: 2025-12-23 00:30
VLAI
Details

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

atm: clip: Fix potential null-ptr-deref in to_atmarpd().

atmarpd is protected by RTNL since commit f3a0592b37b8 ("[ATM]: clip causes unregister hang").

However, it is not enough because to_atmarpd() is called without RTNL, especially clip_neigh_solicit() / neigh_ops->solicit() is unsleepable.

Also, there is no RTNL dependency around atmarpd.

Let's use a private mutex and RCU to protect access to atmarpd in to_atmarpd().

Severity
5.5 (Medium)
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
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{
  "affected": [],
  "aliases": [
    "CVE-2025-38460"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-476"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2025-07-25T16:15:31Z",
    "severity": "MODERATE"
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\natm: clip: Fix potential null-ptr-deref in to_atmarpd().\n\natmarpd is protected by RTNL since commit f3a0592b37b8 (\"[ATM]: clip\ncauses unregister hang\").\n\nHowever, it is not enough because to_atmarpd() is called without RTNL,\nespecially clip_neigh_solicit() / neigh_ops-\u003esolicit() is unsleepable.\n\nAlso, there is no RTNL dependency around atmarpd.\n\nLet\u0027s use a private mutex and RCU to protect access to atmarpd in\nto_atmarpd().",
  "id": "GHSA-vvp3-76jq-q4c4",
  "modified": "2025-12-23T00:30:30Z",
  "published": "2025-07-25T18:30:40Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2025-38460"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/06935c50cfa3ac57cce80bba67b6d38ec1406e92"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/3251ce3979f41bd228f77a7615f9dd616d06a110"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/36caab990b69ef4eec1d81c52a19f080b7daa059"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/706cc36477139c1616a9b2b96610a8bb520b7119"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/70eac9ba7ce25d99c1d99bbf4ddb058940f631f9"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/a4c5785feb979cd996a99cfaad8bf353b2e79301"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/ee4d9e4ddf3f9c4ee2ec0a3aad6196ee36d30e57"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/f58e4270c73e7f086322978d585ea67c8076ce49"
    },
    {
      "type": "WEB",
      "url": "https://lists.debian.org/debian-lts-announce/2025/10/msg00007.html"
    },
    {
      "type": "WEB",
      "url": "https://lists.debian.org/debian-lts-announce/2025/10/msg00008.html"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",
      "type": "CVSS_V3"
    }
  ]
}



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