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

Vulnerability from cvelistv5 – Published: 2026-05-28 09:40 – Updated: 2026-06-14 18:03
VLAI
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
5.5 (Medium)
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Assigner
References
Impacted products
Vendor Product Version CPE status
Linux Linux Affected: c0cfa2d8a788fcf45df5bf4070ab2474c88d543a , < 2ea5d2c79edcc99c7dbe0bb7518f5e1ee2a2391f (git)
Affected: c0cfa2d8a788fcf45df5bf4070ab2474c88d543a , < fd51e810affa38d735d04261e673b2a5fe9c8665 (git)
Affected: c0cfa2d8a788fcf45df5bf4070ab2474c88d543a , < f66c7904fb6f0e420a654bc90909e64a25d00896 (git)
Affected: c0cfa2d8a788fcf45df5bf4070ab2474c88d543a , < 65c484726e74013a2ec7ba67a34d87760ae8f390 (git)
Affected: c0cfa2d8a788fcf45df5bf4070ab2474c88d543a , < 29371f3cc83e2a92265b4768014a30b80234112f (git)
Affected: c0cfa2d8a788fcf45df5bf4070ab2474c88d543a , < e9edf9893cf26d060705c910a9b62d8cc96ed56a (git)
Affected: c0cfa2d8a788fcf45df5bf4070ab2474c88d543a , < 6d3275fc4ed968938e1d556c344798046776668d (git)
Affected: c0cfa2d8a788fcf45df5bf4070ab2474c88d543a , < 52bcb57a4e8a0865a76c587c2451906342ae1b2d (git)
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Linux Linux Affected: 5.5
Unaffected: 0 , < 5.5 (semver)
Unaffected: 5.10.258 , ≤ 5.10.* (semver)
Unaffected: 5.15.209 , ≤ 5.15.* (semver)
Unaffected: 6.1.175 , ≤ 6.1.* (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 , ≤ * (original_commit_for_fix)
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            "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
            "tags": [
              "Patch"
            ],
            "url": "https://git.kernel.org/stable/c/f66c7904fb6f0e420a654bc90909e64a25d00896"
          },
          {
            "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
            "tags": [
              "Patch"
            ],
            "url": "https://git.kernel.org/stable/c/fd51e810affa38d735d04261e673b2a5fe9c8665"
          }
        ],
        "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "vulnStatus": "Analyzed",
        "weaknesses": [
          {
            "description": [
              {
                "lang": "en",
                "value": "NVD-CWE-Other"
              }
            ],
            "source": "nvd@nist.gov",
            "type": "Primary"
          }
        ]
      }
    },
    "redhat_vex": {
      "aggregate_severity": "Moderate",
      "current_release_date": "2026-06-28T07:41:33+00:00",
      "cve": "CVE-2026-46214",
      "id": "CVE-2026-46214",
      "initial_release_date": "2026-05-28T00:00:00+00:00",
      "product_status:known_affected": "232",
      "product_status:known_not_affected": "42",
      "source": "Red Hat CSAF VEX",
      "status": "final",
      "title": "kernel: vsock/virtio: fix accept queue count leak on transport mismatch",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-46214.json",
      "version": "3"
    },
    "suse_vex": {
      "aggregate_severity": "moderate",
      "current_release_date": "2026-09-11T01:11:03Z",
      "cve": "CVE-2026-46214",
      "id": "CVE-2026-46214",
      "initial_release_date": "2026-05-29T01:14:59Z",
      "product_status:first_fixed": "2",
      "product_status:known_affected": "528",
      "product_status:known_not_affected": "175",
      "product_status:recommended": "254",
      "source": "SUSE CSAF VEX",
      "status": "interim",
      "title": "SUSE CVE CVE-2026-46214",
      "url": "https://ftp.suse.com/pub/projects/security/csaf-vex/cve-2026-46214.json",
      "version": "16"
    }
  }
}



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Tags
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.



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.