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vsock: Do not allow binding to VMADDR_PORT_ANY

Type: advisorySources: OSV

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.

Products
Kernel
Affected versions
Not specified
Fixed versions
5.10.241, 5.15.190, 5.4.297, 6.1.148, 6.12.42, 6.15.10, 6.16.1, 6.6.102
CVEs
CVE-2025-38618
Confirmed fixed CVEs
Not specified
Updated in this feed
3 Nov 2026, 10:37 UTC · Revision 1

Source evidence

vsock: Do not allow binding to VMADDR_PORT_ANY

core-osv · Original source

Published 22 Aug 2025, 13:01 UTC

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.

osv:CVE-2025-38618

Kernel

Fixed versions: 5.4.297, 5.10.241, 5.15.190, 6.1.148, 6.6.102, 6.12.42, 6.15.10, 6.16.1

Complete source record
{
  "id": "a052b7c7261a91a72b9b9968355a6a84d29430cfd6bf86de38388aaa82377e69",
  "url": "https://osv.dev/vulnerability/CVE-2025-38618",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "vsock: Do not allow binding to VMADDR_PORT_ANY",
    "summary": "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.",
    "evidence": "osv:CVE-2025-38618",
    "products": [
      {
        "name": {
          "value": "Kernel",
          "evidence": "/affected/1/package/name"
        },
        "prerequisites": [],
        "fixed_versions": [
          {
            "value": "5.4.297",
            "evidence": "/affected/1/ranges"
          },
          {
            "value": "5.10.241",
            "evidence": "/affected/1/ranges"
          },
          {
            "value": "5.15.190",
            "evidence": "/affected/1/ranges"
          },
          {
            "value": "6.1.148",
            "evidence": "/affected/1/ranges"
          },
          {
            "value": "6.6.102",
            "evidence": "/affected/1/ranges"
          },
          {
            "value": "6.12.42",
            "evidence": "/affected/1/ranges"
          },
          {
            "value": "6.15.10",
            "evidence": "/affected/1/ranges"
          },
          {
            "value": "6.16.1",
            "evidence": "/affected/1/ranges"
          }
        ],
        "affected_versions": []
      }
    ],
    "severity": "high",
    "structured": {
      "id": "CVE-2025-38618",
      "aliases": [
        "A-439253642",
        "ASB-A-439253642",
        "CVE-2025-38618"
      ],
      "metrics": [
        {
          "type": "CVSS_V3",
          "score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H"
        }
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
              "type": "GIT",
              "events": [
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                },
                {
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                },
                {
                  "fixed": "d1a5b1964cef42727668ac0d8532dae4f8c19386"
                },
                {
                  "fixed": "cf86704798c1b9c46fa59dfc2d662f57d1394d79"
                },
                {
                  "fixed": "f138be5d7f301fddad4e65ec66dfc3ceebf79be3"
                },
                {
                  "fixed": "44bd006d5c93f6a8f28b106cbae2428c5d0275b7"
                },
                {
                  "fixed": "32950b1907919be86a7a2697d6f93d57068b3865"
                },
                {
                  "fixed": "8f01093646b49f6330bb2d36761983fd829472b1"
                },
                {
                  "fixed": "d73960f0cf03ef1dc9e96ec7a20e538accc26d87"
                },
                {
                  "fixed": "aba0c94f61ec05315fa7815d21aefa4c87f6a9f4"
                }
              ]
            }
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2025-38618.json"
          }
        },
        {
          "ranges": [
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "3.9.0"
                },
                {
                  "fixed": "5.4.297"
                }
              ]
            },
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "5.5.0"
                },
                {
                  "fixed": "5.10.241"
                }
              ]
            },
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "5.11.0"
                },
                {
                  "fixed": "5.15.190"
                }
              ]
            },
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "5.16.0"
                },
                {
                  "fixed": "6.1.148"
                }
              ]
            },
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "6.2.0"
                },
                {
                  "fixed": "6.6.102"
                }
              ]
            },
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "6.7.0"
                },
                {
                  "fixed": "6.12.42"
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              ]
            },
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "6.13.0"
                },
                {
                  "fixed": "6.15.10"
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              ]
            },
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "6.16.0"
                },
                {
                  "fixed": "6.16.1"
                }
              ]
            }
          ],
          "package": {
            "name": "Kernel",
            "ecosystem": "Linux"
          },
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2025-38618.json"
          }
        }
      ],
      "modified": "2026-10-28T02:30:28.242160825Z",
      "provider": "osv",
      "references": [
        "https://git.kernel.org/stable/c/32950b1907919be86a7a2697d6f93d57068b3865",
        "https://git.kernel.org/stable/c/44bd006d5c93f6a8f28b106cbae2428c5d0275b7",
        "https://git.kernel.org/stable/c/8f01093646b49f6330bb2d36761983fd829472b1",
        "https://git.kernel.org/stable/c/aba0c94f61ec05315fa7815d21aefa4c87f6a9f4",
        "https://git.kernel.org/stable/c/c04a2c1ca25b9b23104124d3b2d349d934e302de",
        "https://git.kernel.org/stable/c/cf86704798c1b9c46fa59dfc2d662f57d1394d79",
        "https://git.kernel.org/stable/c/d1a5b1964cef42727668ac0d8532dae4f8c19386",
        "https://git.kernel.org/stable/c/d73960f0cf03ef1dc9e96ec7a20e538accc26d87",
        "https://git.kernel.org/stable/c/f138be5d7f301fddad4e65ec66dfc3ceebf79be3",
        "https://lists.debian.org/debian-lts-announce/2025/10/msg00007.html",
        "https://lists.debian.org/debian-lts-announce/2025/10/msg00008.html",
        "https://github.com/CVEProject/cvelistV5/tree/main/cves/2025/38xxx/CVE-2025-38618.json",
        "https://nvd.nist.gov/vuln/detail/CVE-2025-38618",
        "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"
      ],
      "provider_metadata": {
        "cna_assigner": "Linux",
        "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2025/38xxx/CVE-2025-38618.json"
      }
    },
    "related_cves": [
      {
        "value": "CVE-2025-38618",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 494601,
  "published_at": "2025-08-22T13:01:24.678+00:00"
}