Vulnerability-Lookup

GHSA-4GHP-QFGJ-33P6

Vulnerability from github – Published: 2026-05-28 12:30 – Updated: 2026-05-28 12:30

Details

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

vsock/virtio: fix accept queue count leak on transport mismatch

virtio_transport_recv_listen() calls sk_acceptq_added() before vsock_assign_transport(). If vsock_assign_transport() fails or selects a different transport, the error path returns without calling sk_acceptq_removed(), permanently incrementing sk_ack_backlog.

After approximately backlog+1 such failures, sk_acceptq_is_full() returns true, causing the listener to reject all new connections.

Fix by moving sk_acceptq_added() to after the transport validation, matching the pattern used by vmci_transport and hyperv_transport.

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{
  "affected": [],
  "aliases": [
    "CVE-2026-46214"
  ],
  "database_specific": {
    "cwe_ids": [],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-05-28T10:16:37Z",
    "severity": null
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nvsock/virtio: fix accept queue count leak on transport mismatch\n\nvirtio_transport_recv_listen() calls sk_acceptq_added() before\nvsock_assign_transport(). If vsock_assign_transport() fails or\nselects a different transport, the error path returns without\ncalling sk_acceptq_removed(), permanently incrementing\nsk_ack_backlog.\n\nAfter approximately backlog+1 such failures, sk_acceptq_is_full()\nreturns true, causing the listener to reject all new connections.\n\nFix by moving sk_acceptq_added() to after the transport validation,\nmatching the pattern used by vmci_transport and hyperv_transport.",
  "id": "GHSA-4ghp-qfgj-33p6",
  "modified": "2026-05-28T12:30:33Z",
  "published": "2026-05-28T12:30:33Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-46214"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/29371f3cc83e2a92265b4768014a30b80234112f"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/52bcb57a4e8a0865a76c587c2451906342ae1b2d"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/65c484726e74013a2ec7ba67a34d87760ae8f390"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/6d3275fc4ed968938e1d556c344798046776668d"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/e9edf9893cf26d060705c910a9b62d8cc96ed56a"
    }
  ],
  "schema_version": "1.4.0",
  "severity": []
}

CVE-2026-46214 (GCVE-0-2026-46214)

Vulnerability from cvelistv5 – Published: 2026-05-28 09:40 – Updated: 2026-05-28 09:40

Title

vsock/virtio: fix accept queue count leak on transport mismatch

Summary

In the Linux kernel, the following vulnerability has been resolved: vsock/virtio: fix accept queue count leak on transport mismatch virtio_transport_recv_listen() calls sk_acceptq_added() before vsock_assign_transport(). If vsock_assign_transport() fails or selects a different transport, the error path returns without calling sk_acceptq_removed(), permanently incrementing sk_ack_backlog. After approximately backlog+1 such failures, sk_acceptq_is_full() returns true, causing the listener to reject all new connections. Fix by moving sk_acceptq_added() to after the transport validation, matching the pattern used by vmci_transport and hyperv_transport.

Severity

No CVSS data available.

Assigner

Linux

References

5 references

URL	Tags
https://git.kernel.org/stable/c/65c484726e74013a2…
https://git.kernel.org/stable/c/29371f3cc83e2a922…
https://git.kernel.org/stable/c/e9edf9893cf26d060…
https://git.kernel.org/stable/c/6d3275fc4ed968938…
https://git.kernel.org/stable/c/52bcb57a4e8a0865a…

Impacted products

2 products

Vendor	Product	Version
Linux	Linux	Affected: c0cfa2d8a788fcf45df5bf4070ab2474c88d543a , < 65c484726e74013a2ec7ba67a34d87760ae8f390 (git) Affected: c0cfa2d8a788fcf45df5bf4070ab2474c88d543a , < 29371f3cc83e2a92265b4768014a30b80234112f (git) Affected: c0cfa2d8a788fcf45df5bf4070ab2474c88d543a , < e9edf9893cf26d060705c910a9b62d8cc96ed56a (git) Affected: c0cfa2d8a788fcf45df5bf4070ab2474c88d543a , < 6d3275fc4ed968938e1d556c344798046776668d (git) Affected: c0cfa2d8a788fcf45df5bf4070ab2474c88d543a , < 52bcb57a4e8a0865a76c587c2451906342ae1b2d (git)
Linux	Linux	Affected: 5.5 Unaffected: 0 , < 5.5 (semver) Unaffected: 6.6.140 , ≤ 6.6.* (semver) Unaffected: 6.12.90 , ≤ 6.12.* (semver) Unaffected: 6.18.32 , ≤ 6.18.* (semver) Unaffected: 7.0.9 , ≤ 7.0.* (semver) Unaffected: 7.1-rc1 , ≤ * (original_commit_for_fix)

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JSON

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{
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      "affected": [
        {
          "defaultStatus": "unaffected",
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          "programFiles": [
            "net/vmw_vsock/virtio_transport_common.c"
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        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
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              "version": "5.5"
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              "version": "0",
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              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.12.*",
              "status": "unaffected",
              "version": "6.12.90",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.18.*",
              "status": "unaffected",
              "version": "6.18.32",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "7.0.*",
              "status": "unaffected",
              "version": "7.0.9",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "7.1-rc1",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "cpeApplicability": [
        {
          "nodes": [
            {
              "cpeMatch": [
                {
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      "providerMetadata": {
        "dateUpdated": "2026-05-28T09:40:31.245Z",
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          "url": "https://git.kernel.org/stable/c/52bcb57a4e8a0865a76c587c2451906342ae1b2d"
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      "title": "vsock/virtio: fix accept queue count leak on transport mismatch",
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    "cveId": "CVE-2026-46214",
    "datePublished": "2026-05-28T09:40:31.245Z",
    "dateReserved": "2026-05-13T15:03:33.105Z",
    "dateUpdated": "2026-05-28T09:40:31.245Z",
    "state": "PUBLISHED"
  },
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  "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.

Detection rules are retrieved from Rulezet.

Action not permitted

GHSA-4GHP-QFGJ-33P6

CVE-2026-46214 (GCVE-0-2026-46214)

Tags

Sightings

Nomenclature