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

Type: advisorySource: Official CVE List1 source record

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.

Announced Source revision 1
Original source ↗

CVE-2026-46214

Primary source · Revision 1

Imported from structured advisory data. Source references identify upstream records or fields; verify affected versions and your deployed configuration.

Security context

Source reference: cve:CVE-2026-46214

Linux

Source reference: /containers/cna/affected/0/product

Affected versions
Not stated in this record
Fixed versions
Not stated in this record
Prerequisites
Not stated in this record

Linux

Source reference: /containers/cna/affected/1/product

Affected versions
Not stated in this record
Fixed versions
Not stated in this record
Prerequisites
Not stated in this record

Structured affected-version data

Original package identities and version rules from this source.

[
  {
    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
    "vendor": "Linux",
    "product": "Linux",
    "versions": [
      {
        "status": "affected",
        "version": "c0cfa2d8a788fcf45df5bf4070ab2474c88d543a",
        "lessThan": "2ea5d2c79edcc99c7dbe0bb7518f5e1ee2a2391f",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "c0cfa2d8a788fcf45df5bf4070ab2474c88d543a",
        "lessThan": "fd51e810affa38d735d04261e673b2a5fe9c8665",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "c0cfa2d8a788fcf45df5bf4070ab2474c88d543a",
        "lessThan": "f66c7904fb6f0e420a654bc90909e64a25d00896",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "c0cfa2d8a788fcf45df5bf4070ab2474c88d543a",
        "lessThan": "65c484726e74013a2ec7ba67a34d87760ae8f390",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "c0cfa2d8a788fcf45df5bf4070ab2474c88d543a",
        "lessThan": "29371f3cc83e2a92265b4768014a30b80234112f",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "c0cfa2d8a788fcf45df5bf4070ab2474c88d543a",
        "lessThan": "e9edf9893cf26d060705c910a9b62d8cc96ed56a",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "c0cfa2d8a788fcf45df5bf4070ab2474c88d543a",
        "lessThan": "6d3275fc4ed968938e1d556c344798046776668d",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "c0cfa2d8a788fcf45df5bf4070ab2474c88d543a",
        "lessThan": "52bcb57a4e8a0865a76c587c2451906342ae1b2d",
        "versionType": "git"
      }
    ],
    "programFiles": [
      "net/vmw_vsock/virtio_transport_common.c"
    ],
    "defaultStatus": "unaffected"
  },
  {
    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
    "vendor": "Linux",
    "product": "Linux",
    "versions": [
      {
        "status": "affected",
        "version": "5.5"
      },
      {
        "status": "unaffected",
        "version": "0",
        "lessThan": "5.5",
        "versionType": "semver"
      },
      {
        "status": "unaffected",
        "version": "5.10.258",
        "versionType": "semver",
        "lessThanOrEqual": "5.10.*"
      },
      {
        "status": "unaffected",
        "version": "5.15.209",
        "versionType": "semver",
        "lessThanOrEqual": "5.15.*"
      },
      {
        "status": "unaffected",
        "version": "6.1.175",
        "versionType": "semver",
        "lessThanOrEqual": "6.1.*"
      },
      {
        "status": "unaffected",
        "version": "6.6.140",
        "versionType": "semver",
        "lessThanOrEqual": "6.6.*"
      },
      {
        "status": "unaffected",
        "version": "6.12.90",
        "versionType": "semver",
        "lessThanOrEqual": "6.12.*"
      },
      {
        "status": "unaffected",
        "version": "6.18.32",
        "versionType": "semver",
        "lessThanOrEqual": "6.18.*"
      },
      {
        "status": "unaffected",
        "version": "7.0.9",
        "versionType": "semver",
        "lessThanOrEqual": "7.0.*"
      },
      {
        "status": "unaffected",
        "version": "7.1",
        "versionType": "original_commit_for_fix",
        "lessThanOrEqual": "*"
      }
    ],
    "programFiles": [
      "net/vmw_vsock/virtio_transport_common.c"
    ],
    "defaultStatus": "affected"
  }
]
Related CVEs
CVE-2026-46214

Source reference: /cveMetadata/cveId

Publisher severity

No explicit severity was provided.

Event
#28411 · Revision 1
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Publisher date
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