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Bluetooth: bnep: pin L2CAP connection during netdev registration

Type: advisorySource: Official CVE List1 source record

In the Linux kernel, the following vulnerability has been resolved: Bluetooth: bnep: pin L2CAP connection during netdev registration bnep_add_connection() reads the L2CAP connection without holding the channel lock, then passes its HCI device to register_netdev(). Controller teardown can clear and release that connection concurrently, leaving the network device registration path to dereference a freed parent device. Take a reference to the L2CAP connection while holding the channel lock. Retain it until register_netdev() has taken the parent device reference.

Announced Source revision 1
Original source ↗

CVE-2026-64408

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-2026-64408

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": "65f53e9802dbfae0e5758a91793c3f5f8bece49b",
        "lessThan": "390b5db3ff8745187f094c4e915663b7b1f98944",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "65f53e9802dbfae0e5758a91793c3f5f8bece49b",
        "lessThan": "46a88784c4c9b96954dd86f747ce93f65efa1302",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "65f53e9802dbfae0e5758a91793c3f5f8bece49b",
        "lessThan": "551ae773ec64045b4e72099132654887e0270bcc",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "65f53e9802dbfae0e5758a91793c3f5f8bece49b",
        "lessThan": "ae215c5b6422d8eda443b861b124bd1be6969c31",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "65f53e9802dbfae0e5758a91793c3f5f8bece49b",
        "lessThan": "df22adc7eafc22e651561813c11dc51a796b12ee",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "65f53e9802dbfae0e5758a91793c3f5f8bece49b",
        "lessThan": "a6b22dbd80926556290ad2243be25218d6956a19",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "65f53e9802dbfae0e5758a91793c3f5f8bece49b",
        "lessThan": "563a8573047182f550b1e1e030615755cd8c41da",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "65f53e9802dbfae0e5758a91793c3f5f8bece49b",
        "lessThan": "bb067a99a0356196c0b89a95721985485ebce5a5",
        "versionType": "git"
      }
    ],
    "programFiles": [
      "net/bluetooth/bnep/core.c"
    ],
    "defaultStatus": "unaffected"
  },
  {
    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
    "vendor": "Linux",
    "product": "Linux",
    "versions": [
      {
        "status": "affected",
        "version": "3.13"
      },
      {
        "status": "unaffected",
        "version": "0",
        "lessThan": "3.13",
        "versionType": "semver"
      },
      {
        "status": "unaffected",
        "version": "5.10.261",
        "versionType": "semver",
        "lessThanOrEqual": "5.10.*"
      },
      {
        "status": "unaffected",
        "version": "5.15.212",
        "versionType": "semver",
        "lessThanOrEqual": "5.15.*"
      },
      {
        "status": "unaffected",
        "version": "6.1.178",
        "versionType": "semver",
        "lessThanOrEqual": "6.1.*"
      },
      {
        "status": "unaffected",
        "version": "6.6.145",
        "versionType": "semver",
        "lessThanOrEqual": "6.6.*"
      },
      {
        "status": "unaffected",
        "version": "6.12.96",
        "versionType": "semver",
        "lessThanOrEqual": "6.12.*"
      },
      {
        "status": "unaffected",
        "version": "6.18.39",
        "versionType": "semver",
        "lessThanOrEqual": "6.18.*"
      },
      {
        "status": "unaffected",
        "version": "7.1.4",
        "versionType": "semver",
        "lessThanOrEqual": "7.1.*"
      },
      {
        "status": "unaffected",
        "version": "7.2",
        "versionType": "original_commit_for_fix",
        "lessThanOrEqual": "*"
      }
    ],
    "programFiles": [
      "net/bluetooth/bnep/core.c"
    ],
    "defaultStatus": "affected"
  }
]
Related CVEs
CVE-2026-64408

Source reference: /cveMetadata/cveId

Publisher severity

high

Source reference: /containers/cna/metrics

Event
#41033 · Revision 1
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Publisher date
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