Vulnerability-Lookup

FKIE_CVE-2026-46214

Vulnerability from fkie_nvd - Published: 2026-05-28 10:16 - Updated: 2026-05-28 13:44

Severity

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.

References

	URL	Tags
	416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/29371f3cc83e2a92265b4768014a30b80234112f
	416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/52bcb57a4e8a0865a76c587c2451906342ae1b2d
	416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/65c484726e74013a2ec7ba67a34d87760ae8f390
	416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/6d3275fc4ed968938e1d556c344798046776668d
	416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/e9edf9893cf26d060705c910a9b62d8cc96ed56a

Impacted products

	Vendor	Product	Version

JSON

To clipboard

{
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "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": "CVE-2026-46214",
  "lastModified": "2026-05-28T13:44:01.663",
  "metrics": {},
  "published": "2026-05-28T10:16:37.050",
  "references": [
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/29371f3cc83e2a92265b4768014a30b80234112f"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/52bcb57a4e8a0865a76c587c2451906342ae1b2d"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/65c484726e74013a2ec7ba67a34d87760ae8f390"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/6d3275fc4ed968938e1d556c344798046776668d"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/e9edf9893cf26d060705c910a9b62d8cc96ed56a"
    }
  ],
  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
  "vulnStatus": "Awaiting Analysis"
}

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

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)

Show details on NVD website

JSON

To clipboard

{
  "containers": {
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "net/vmw_vsock/virtio_transport_common.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "65c484726e74013a2ec7ba67a34d87760ae8f390",
              "status": "affected",
              "version": "c0cfa2d8a788fcf45df5bf4070ab2474c88d543a",
              "versionType": "git"
            },
            {
              "lessThan": "29371f3cc83e2a92265b4768014a30b80234112f",
              "status": "affected",
              "version": "c0cfa2d8a788fcf45df5bf4070ab2474c88d543a",
              "versionType": "git"
            },
            {
              "lessThan": "e9edf9893cf26d060705c910a9b62d8cc96ed56a",
              "status": "affected",
              "version": "c0cfa2d8a788fcf45df5bf4070ab2474c88d543a",
              "versionType": "git"
            },
            {
              "lessThan": "6d3275fc4ed968938e1d556c344798046776668d",
              "status": "affected",
              "version": "c0cfa2d8a788fcf45df5bf4070ab2474c88d543a",
              "versionType": "git"
            },
            {
              "lessThan": "52bcb57a4e8a0865a76c587c2451906342ae1b2d",
              "status": "affected",
              "version": "c0cfa2d8a788fcf45df5bf4070ab2474c88d543a",
              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "net/vmw_vsock/virtio_transport_common.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "5.5"
            },
            {
              "lessThan": "5.5",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.6.*",
              "status": "unaffected",
              "version": "6.6.140",
              "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": [
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.6.140",
                  "versionStartIncluding": "5.5",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.12.90",
                  "versionStartIncluding": "5.5",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.18.32",
                  "versionStartIncluding": "5.5",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "7.0.9",
                  "versionStartIncluding": "5.5",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "7.1-rc1",
                  "versionStartIncluding": "5.5",
                  "vulnerable": true
                }
              ],
              "negate": false,
              "operator": "OR"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "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."
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-05-28T09:40:31.245Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/65c484726e74013a2ec7ba67a34d87760ae8f390"
        },
        {
          "url": "https://git.kernel.org/stable/c/29371f3cc83e2a92265b4768014a30b80234112f"
        },
        {
          "url": "https://git.kernel.org/stable/c/e9edf9893cf26d060705c910a9b62d8cc96ed56a"
        },
        {
          "url": "https://git.kernel.org/stable/c/6d3275fc4ed968938e1d556c344798046776668d"
        },
        {
          "url": "https://git.kernel.org/stable/c/52bcb57a4e8a0865a76c587c2451906342ae1b2d"
        }
      ],
      "title": "vsock/virtio: fix accept queue count leak on transport mismatch",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "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"
  },
  "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.

Detection rules are retrieved from Rulezet.

Action not permitted

FKIE_CVE-2026-46214

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

Tags

Sightings

Nomenclature