Vulnerability-Lookup

FKIE_CVE-2025-38618

Vulnerability from fkie_nvd - Published: 2025-08-22 14:15 - Updated: 2026-07-30 06:23

Severity

7.8 (High) - CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
7.8 (High) - CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

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.

References

URL	Tags
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/32950b1907919be86a7a2697d6f93d57068b3865	Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/44bd006d5c93f6a8f28b106cbae2428c5d0275b7	Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/8f01093646b49f6330bb2d36761983fd829472b1	Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/aba0c94f61ec05315fa7815d21aefa4c87f6a9f4	Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/c04a2c1ca25b9b23104124d3b2d349d934e302de	Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/cf86704798c1b9c46fa59dfc2d662f57d1394d79	Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/d1a5b1964cef42727668ac0d8532dae4f8c19386	Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/d73960f0cf03ef1dc9e96ec7a20e538accc26d87	Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/f138be5d7f301fddad4e65ec66dfc3ceebf79be3	Patch
af854a3a-2127-422b-91ae-364da2661108	https://lists.debian.org/debian-lts-announce/2025/10/msg00007.html	Third Party Advisory
af854a3a-2127-422b-91ae-364da2661108	https://lists.debian.org/debian-lts-announce/2025/10/msg00008.html	Third Party Advisory

Impacted products

Vendor	Product	Version
linux	linux_kernel	*
linux	linux_kernel	*
linux	linux_kernel	*
linux	linux_kernel	*
linux	linux_kernel	*
linux	linux_kernel	*
linux	linux_kernel	*
linux	linux_kernel	*
linux	linux_kernel	6.17
debian	debian_linux	11.0

JSON

To clipboard

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    {
      "affectedData": [
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          "product": "Linux",
          "programFiles": [
            "net/vmw_vsock/af_vsock.c"
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      ],
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    }
  ],
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  ],
  "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 VMADDR_PORT_ANY."
    }
  ],
  "id": "CVE-2025-38618",
  "lastModified": "2026-07-30T06:23:31.593",
  "metrics": {
    "cvssMetricV31": [
      {
        "cvssData": {
          "attackComplexity": "LOW",
          "attackVector": "LOCAL",
          "availabilityImpact": "HIGH",
          "baseScore": 7.8,
          "baseSeverity": "HIGH",
          "confidentialityImpact": "HIGH",
          "integrityImpact": "HIGH",
          "privilegesRequired": "LOW",
          "scope": "UNCHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
          "version": "3.1"
        },
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        "impactScore": 5.9,
        "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "type": "Secondary"
      },
      {
        "cvssData": {
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          "attackVector": "LOCAL",
          "availabilityImpact": "HIGH",
          "baseScore": 7.8,
          "baseSeverity": "HIGH",
          "confidentialityImpact": "HIGH",
          "integrityImpact": "HIGH",
          "privilegesRequired": "LOW",
          "scope": "UNCHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
          "version": "3.1"
        },
        "exploitabilityScore": 1.8,
        "impactScore": 5.9,
        "source": "nvd@nist.gov",
        "type": "Primary"
      }
    ],
    "ssvcV203": [
      {
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "ssvcData": {
          "id": "CVE-2025-38618",
          "options": [
            {
              "exploitation": "none"
            },
            {
              "automatable": "no"
            },
            {
              "technicalImpact": "total"
            }
          ],
          "role": "CISA Coordinator",
          "timestamp": "2026-06-10T20:42:30.337631Z",
          "version": "2.0.3"
        }
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    ]
  },
  "published": "2025-08-22T14:15:46.303",
  "references": [
    {
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      "url": "https://git.kernel.org/stable/c/32950b1907919be86a7a2697d6f93d57068b3865"
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  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
  "vulnStatus": "Modified",
  "weaknesses": [
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          "value": "CWE-416"
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      "source": "nvd@nist.gov",
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}

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

Vulnerability from cvelistv5 – Published: 2025-08-22 13:01 – Updated: 2026-08-05 12:03

Title

vsock: Do not allow binding to VMADDR_PORT_ANY

Summary

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

Linux CNA under the mitre root

CNA scorecard D 53/100 over 7056 records in the last 180 days details

References

11 references

URL	Tags
https://git.kernel.org/stable/c/c04a2c1ca25b9b231…
https://git.kernel.org/stable/c/d1a5b1964cef42727…
https://git.kernel.org/stable/c/cf86704798c1b9c46…
https://git.kernel.org/stable/c/f138be5d7f301fdda…
https://git.kernel.org/stable/c/44bd006d5c93f6a8f…
https://git.kernel.org/stable/c/32950b1907919be86…
https://git.kernel.org/stable/c/8f01093646b49f633…
https://git.kernel.org/stable/c/d73960f0cf03ef1dc…
https://git.kernel.org/stable/c/aba0c94f61ec05315…
https://lists.debian.org/debian-lts-announce/2025…
https://lists.debian.org/debian-lts-announce/2025…

Impacted products

2 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)
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)

Show details on NVD website

JSON

To clipboard

{
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        "providerMetadata": {
          "dateUpdated": "2025-11-03T17:40:30.483Z",
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        "title": "CVE Program Container"
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                "id": "CVE-2025-38618",
                "options": [
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                ],
                "role": "CISA Coordinator",
                "timestamp": "2026-06-10T20:42:30.337631Z",
                "version": "2.0.3"
              },
              "type": "ssvc"
            }
          }
        ],
        "providerMetadata": {
          "dateUpdated": "2026-06-11T18:44:23.948Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "title": "CISA ADP Vulnrichment"
      }
    ],
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "net/vmw_vsock/af_vsock.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "c04a2c1ca25b9b23104124d3b2d349d934e302de",
              "status": "affected",
              "version": "d021c344051af91f42c5ba9fdedc176740cbd238",
              "versionType": "git"
            },
            {
              "lessThan": "d1a5b1964cef42727668ac0d8532dae4f8c19386",
              "status": "affected",
              "version": "d021c344051af91f42c5ba9fdedc176740cbd238",
              "versionType": "git"
            },
            {
              "lessThan": "cf86704798c1b9c46fa59dfc2d662f57d1394d79",
              "status": "affected",
              "version": "d021c344051af91f42c5ba9fdedc176740cbd238",
              "versionType": "git"
            },
            {
              "lessThan": "f138be5d7f301fddad4e65ec66dfc3ceebf79be3",
              "status": "affected",
              "version": "d021c344051af91f42c5ba9fdedc176740cbd238",
              "versionType": "git"
            },
            {
              "lessThan": "44bd006d5c93f6a8f28b106cbae2428c5d0275b7",
              "status": "affected",
              "version": "d021c344051af91f42c5ba9fdedc176740cbd238",
              "versionType": "git"
            },
            {
              "lessThan": "32950b1907919be86a7a2697d6f93d57068b3865",
              "status": "affected",
              "version": "d021c344051af91f42c5ba9fdedc176740cbd238",
              "versionType": "git"
            },
            {
              "lessThan": "8f01093646b49f6330bb2d36761983fd829472b1",
              "status": "affected",
              "version": "d021c344051af91f42c5ba9fdedc176740cbd238",
              "versionType": "git"
            },
            {
              "lessThan": "d73960f0cf03ef1dc9e96ec7a20e538accc26d87",
              "status": "affected",
              "version": "d021c344051af91f42c5ba9fdedc176740cbd238",
              "versionType": "git"
            },
            {
              "lessThan": "aba0c94f61ec05315fa7815d21aefa4c87f6a9f4",
              "status": "affected",
              "version": "d021c344051af91f42c5ba9fdedc176740cbd238",
              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "net/vmw_vsock/af_vsock.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "3.9"
            },
            {
              "lessThan": "3.9",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.4.*",
              "status": "unaffected",
              "version": "5.4.297",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.10.*",
              "status": "unaffected",
              "version": "5.10.241",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.15.*",
              "status": "unaffected",
              "version": "5.15.190",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.1.*",
              "status": "unaffected",
              "version": "6.1.148",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.6.*",
              "status": "unaffected",
              "version": "6.6.102",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.12.*",
              "status": "unaffected",
              "version": "6.12.42",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.15.*",
              "status": "unaffected",
              "version": "6.15.10",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.16.*",
              "status": "unaffected",
              "version": "6.16.1",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "6.17",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "cpeApplicability": [
        {
          "nodes": [
            {
              "cpeMatch": [
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "5.4.297",
                  "versionStartIncluding": "3.9",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "5.10.241",
                  "versionStartIncluding": "3.9",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "5.15.190",
                  "versionStartIncluding": "3.9",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.1.148",
                  "versionStartIncluding": "3.9",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.6.102",
                  "versionStartIncluding": "3.9",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.12.42",
                  "versionStartIncluding": "3.9",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.15.10",
                  "versionStartIncluding": "3.9",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.16.1",
                  "versionStartIncluding": "3.9",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.17",
                  "versionStartIncluding": "3.9",
                  "vulnerable": true
                }
              ],
              "negate": false,
              "operator": "OR"
            }
          ]
        }
      ],
      "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."
        }
      ],
      "metrics": [
        {
          "cvssV3_1": {
            "baseScore": 7.8,
            "baseSeverity": "HIGH",
            "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
            "version": "3.1"
          },
          "scenarios": [
            {
              "lang": "en",
              "value": "AV:L - The vulnerability is triggered through the bind() syscall on an AF_VSOCK socket; vsock is a local socket interface with no remote network reachability, so the attacker needs local system access.\nAC:L - The accept()-based trigger is fully deterministic \u2014 create a loopback vsock listener, connect, accept, then bind the accepted socket to VMADDR_PORT_ANY to force the extra sock_put; no race or uncontrolled condition is required.\nPR:L - Any unprivileged local user can create AF_VSOCK sockets and use the loopback (VMADDR_CID_LOCAL) transport; the autobind path performs no capability check, so only basic user privileges are needed.\nUI:N - The entire sequence is performed by the attacker\u0027s own process via syscalls; no action by any other user is required.\nS:U - The use-after-free corrupts kernel memory within the same kernel security authority and does not cross a VM/hypervisor or IOMMU boundary.\nC:H - A use-after-free of the struct sock lets the attacker reclaim the freed object with controlled data, enabling arbitrary kernel memory disclosure.\nI:H - The UAF/refcount underflow enables heap grooming and write primitives over the reclaimed object, permitting kernel memory modification and potential control-flow hijack.\nA:H - The refcount underflow frees a still-referenced socket, causing use-after-free access that reliably crashes/panics the kernel."
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-08-05T12:03:33.962Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/c04a2c1ca25b9b23104124d3b2d349d934e302de"
        },
        {
          "url": "https://git.kernel.org/stable/c/d1a5b1964cef42727668ac0d8532dae4f8c19386"
        },
        {
          "url": "https://git.kernel.org/stable/c/cf86704798c1b9c46fa59dfc2d662f57d1394d79"
        },
        {
          "url": "https://git.kernel.org/stable/c/f138be5d7f301fddad4e65ec66dfc3ceebf79be3"
        },
        {
          "url": "https://git.kernel.org/stable/c/44bd006d5c93f6a8f28b106cbae2428c5d0275b7"
        },
        {
          "url": "https://git.kernel.org/stable/c/32950b1907919be86a7a2697d6f93d57068b3865"
        },
        {
          "url": "https://git.kernel.org/stable/c/8f01093646b49f6330bb2d36761983fd829472b1"
        },
        {
          "url": "https://git.kernel.org/stable/c/d73960f0cf03ef1dc9e96ec7a20e538accc26d87"
        },
        {
          "url": "https://git.kernel.org/stable/c/aba0c94f61ec05315fa7815d21aefa4c87f6a9f4"
        }
      ],
      "title": "vsock: Do not allow binding to VMADDR_PORT_ANY",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2025-38618",
    "datePublished": "2025-08-22T13:01:24.678Z",
    "dateReserved": "2025-04-16T04:51:24.029Z",
    "dateUpdated": "2026-08-05T12:03:33.962Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}

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.

Vulnerability timeline

Sightings and recorded dates, grouped by day · UTC

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The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base model, served locally by ML-Gateway. They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.

Related by attack behaviour

Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.

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