GHSA-9V4W-R8XW-999H

Vulnerability from github – Published: 2025-08-22 15:33 – Updated: 2026-01-07 18:30
VLAI
Details

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

vsock: Do not allow binding to VMADDR_PORT_ANY

It is possible for a vsock to autobind to VMADDR_PORT_ANY. This can cause a use-after-free when a connection is made to the bound socket. The socket returned by accept() also has port VMADDR_PORT_ANY but is not on the list of unbound sockets. Binding it will result in an extra refcount decrement similar to the one fixed in fcdd2242c023 (vsock: Keep the binding until socket destruction).

Modify the check in __vsock_bind_connectible() to also prevent binding to VMADDR_PORT_ANY.

Severity
7.8 (High)
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
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{
  "affected": [],
  "aliases": [
    "CVE-2025-38618"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-416"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2025-08-22T14:15:46Z",
    "severity": "HIGH"
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nvsock: Do not allow binding to VMADDR_PORT_ANY\n\nIt is possible for a vsock to autobind to VMADDR_PORT_ANY. This can\ncause a use-after-free when a connection is made to the bound socket.\nThe socket returned by accept() also has port VMADDR_PORT_ANY but is not\non the list of unbound sockets. Binding it will result in an extra\nrefcount decrement similar to the one fixed in fcdd2242c023 (vsock: Keep\nthe binding until socket destruction).\n\nModify the check in __vsock_bind_connectible() to also prevent binding\nto VMADDR_PORT_ANY.",
  "id": "GHSA-9v4w-r8xw-999h",
  "modified": "2026-01-07T18:30:20Z",
  "published": "2025-08-22T15:33:05Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2025-38618"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/32950b1907919be86a7a2697d6f93d57068b3865"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/44bd006d5c93f6a8f28b106cbae2428c5d0275b7"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/8f01093646b49f6330bb2d36761983fd829472b1"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/aba0c94f61ec05315fa7815d21aefa4c87f6a9f4"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/c04a2c1ca25b9b23104124d3b2d349d934e302de"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/cf86704798c1b9c46fa59dfc2d662f57d1394d79"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/d1a5b1964cef42727668ac0d8532dae4f8c19386"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/d73960f0cf03ef1dc9e96ec7a20e538accc26d87"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/f138be5d7f301fddad4e65ec66dfc3ceebf79be3"
    },
    {
      "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:H/I:H/A:H",
      "type": "CVSS_V3"
    }
  ]
}



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