CVE-2025-38618 (GCVE-0-2025-38618)

Vulnerability from cvelistv5 – Published: 2025-08-22 13:01 – Updated: 2026-08-05 12:03
VLAI
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.
Severity
7.8 (High)
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
SSVC
Exploitation: none Automatable: no Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-06-10 20:42 UTC
Assigner
References
Impacted products
Vendor Product Version
Linux Linux Affected: d021c344051af91f42c5ba9fdedc176740cbd238 , < c04a2c1ca25b9b23104124d3b2d349d934e302de (git)
Affected: d021c344051af91f42c5ba9fdedc176740cbd238 , < d1a5b1964cef42727668ac0d8532dae4f8c19386 (git)
Affected: d021c344051af91f42c5ba9fdedc176740cbd238 , < cf86704798c1b9c46fa59dfc2d662f57d1394d79 (git)
Affected: d021c344051af91f42c5ba9fdedc176740cbd238 , < f138be5d7f301fddad4e65ec66dfc3ceebf79be3 (git)
Affected: d021c344051af91f42c5ba9fdedc176740cbd238 , < 44bd006d5c93f6a8f28b106cbae2428c5d0275b7 (git)
Affected: d021c344051af91f42c5ba9fdedc176740cbd238 , < 32950b1907919be86a7a2697d6f93d57068b3865 (git)
Affected: d021c344051af91f42c5ba9fdedc176740cbd238 , < 8f01093646b49f6330bb2d36761983fd829472b1 (git)
Affected: d021c344051af91f42c5ba9fdedc176740cbd238 , < d73960f0cf03ef1dc9e96ec7a20e538accc26d87 (git)
Affected: d021c344051af91f42c5ba9fdedc176740cbd238 , < aba0c94f61ec05315fa7815d21aefa4c87f6a9f4 (git)
Create a notification for this product.
Linux Linux Affected: 3.9
Unaffected: 0 , < 3.9 (semver)
Unaffected: 5.4.297 , ≤ 5.4.* (semver)
Unaffected: 5.10.241 , ≤ 5.10.* (semver)
Unaffected: 5.15.190 , ≤ 5.15.* (semver)
Unaffected: 6.1.148 , ≤ 6.1.* (semver)
Unaffected: 6.6.102 , ≤ 6.6.* (semver)
Unaffected: 6.12.42 , ≤ 6.12.* (semver)
Unaffected: 6.15.10 , ≤ 6.15.* (semver)
Unaffected: 6.16.1 , ≤ 6.16.* (semver)
Unaffected: 6.17 , ≤ * (original_commit_for_fix)
Create a notification for this product.
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    "datePublished": "2025-08-22T13:01:24.678Z",
    "dateReserved": "2025-04-16T04:51:24.029Z",
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      "cve": "CVE-2025-38618",
      "date": "2026-08-16",
      "epss": "0.00163",
      "percentile": "0.05993"
    },
    "microsoft_vex": {
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      "cve": "CVE-2025-38618",
      "id": "msrc_CVE-2025-38618",
      "initial_release_date": "2025-08-02T00:00:00.000Z",
      "product_status:fixed": "2",
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      "source": "Microsoft CSAF VEX",
      "status": "final",
      "title": "vsock: Do not allow binding to VMADDR_PORT_ANY",
      "url": "https://msrc.microsoft.com/csaf/vex/2025/msrc_cve-2025-38618.json",
      "version": "3"
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    "nvd": "{\"cve\":{\"id\":\"CVE-2025-38618\",\"sourceIdentifier\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"published\":\"2025-08-22T14:15:46.303\",\"lastModified\":\"2026-07-30T06:23:31.593\",\"vulnStatus\":\"Modified\",\"cveTags\":[],\"descriptions\":[{\"lang\":\"en\",\"value\":\"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.\"},{\"lang\":\"es\",\"value\":\"En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: vsock: No permitir la vinculaci\u00f3n a VMADDR_PORT_ANY. Es posible que un vsock se autoenlace a VMADDR_PORT_ANY. Esto puede causar un use-after-free cuando se establece una conexi\u00f3n al socket enlazado. El socket devuelto por accept() tambi\u00e9n tiene el puerto VMADDR_PORT_ANY, pero no est\u00e1 en la lista de sockets no enlazados. Vincularlo resultar\u00e1 en una disminuci\u00f3n adicional del recuento de referencias similar a la corregida en fcdd2242c023 (vsock: Mantener la vinculaci\u00f3n hasta la destrucci\u00f3n del socket). Modifique la comprobaci\u00f3n en __vsock_bind_connectible() para evitar tambi\u00e9n la vinculaci\u00f3n a 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    "redhat_vex": {
      "aggregate_severity": "Moderate",
      "current_release_date": "2026-07-30T09:02:35+00:00",
      "cve": "CVE-2025-38618",
      "id": "CVE-2025-38618",
      "initial_release_date": "2025-08-22T00:00:00+00:00",
      "product_status:known_affected": "260",
      "product_status:known_not_affected": "14",
      "source": "Red Hat CSAF VEX",
      "status": "final",
      "title": "kernel: vsock: Do not allow binding to VMADDR_PORT_ANY",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2025/cve-2025-38618.json",
      "version": "3"
    },
    "suse_vex": {
      "aggregate_severity": "important",
      "current_release_date": "2026-08-12T00:04:47Z",
      "cve": "CVE-2025-38618",
      "id": "CVE-2025-38618",
      "initial_release_date": "2025-08-22T23:29:07Z",
      "product_status:first_fixed": "2",
      "product_status:known_affected": "530",
      "product_status:known_not_affected": "6",
      "product_status:recommended": "942",
      "source": "SUSE CSAF VEX",
      "status": "interim",
      "title": "SUSE CVE CVE-2025-38618",
      "url": "https://ftp.suse.com/pub/projects/security/csaf-vex/cve-2025-38618.json",
      "version": "79"
    },
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{\"url\": \"https://git.kernel.org/stable/c/8f01093646b49f6330bb2d36761983fd829472b1\"}, {\"url\": \"https://git.kernel.org/stable/c/d73960f0cf03ef1dc9e96ec7a20e538accc26d87\"}, {\"url\": \"https://git.kernel.org/stable/c/aba0c94f61ec05315fa7815d21aefa4c87f6a9f4\"}], \"x_generator\": {\"engine\": \"bippy-1.2.0\"}, \"descriptions\": [{\"lang\": \"en\", \"value\": \"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. 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      "cveMetadata": "{\"cveId\": \"CVE-2025-38618\", \"state\": \"PUBLISHED\", \"dateUpdated\": \"2026-07-30T05:55:49.869Z\", \"dateReserved\": \"2025-04-16T04:51:24.029Z\", \"assignerOrgId\": \"416baaa9-dc9f-4396-8d5f-8c081fb06d67\", \"datePublished\": \"2025-08-22T13:01:24.678Z\", \"assignerShortName\": \"Linux\"}",
      "dataType": "CVE_RECORD",
      "dataVersion": "5.2"
    }
  }
}



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Taxonomy of the tags.





Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

Sightings

Author Source Type Date Other

Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
  • Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
  • Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.


Detection rules are retrieved from Rulezet.