Vulnerability-Lookup

CVE-2026-64408 (GCVE-0-2026-64408)

Vulnerability from cvelistv5 – Published: 2026-07-25 08:50 – Updated: 2026-07-27 05:00

Title

Bluetooth: bnep: pin L2CAP connection during netdev registration

Summary

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.

Severity

8.8 (High)


                        
                          CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Assigner

Linux

References

8 references

URL	Tags
https://git.kernel.org/stable/c/390b5db3ff8745187…
https://git.kernel.org/stable/c/46a88784c4c9b9695…
https://git.kernel.org/stable/c/551ae773ec64045b4…
https://git.kernel.org/stable/c/ae215c5b6422d8eda…
https://git.kernel.org/stable/c/df22adc7eafc22e65…
https://git.kernel.org/stable/c/a6b22dbd809265562…
https://git.kernel.org/stable/c/563a8573047182f55…
https://git.kernel.org/stable/c/bb067a99a0356196c…

Impacted products

2 products

Vendor	Product	Version
Linux	Linux	Affected: 65f53e9802dbfae0e5758a91793c3f5f8bece49b , < 390b5db3ff8745187f094c4e915663b7b1f98944 (git) Affected: 65f53e9802dbfae0e5758a91793c3f5f8bece49b , < 46a88784c4c9b96954dd86f747ce93f65efa1302 (git) Affected: 65f53e9802dbfae0e5758a91793c3f5f8bece49b , < 551ae773ec64045b4e72099132654887e0270bcc (git) Affected: 65f53e9802dbfae0e5758a91793c3f5f8bece49b , < ae215c5b6422d8eda443b861b124bd1be6969c31 (git) Affected: 65f53e9802dbfae0e5758a91793c3f5f8bece49b , < df22adc7eafc22e651561813c11dc51a796b12ee (git) Affected: 65f53e9802dbfae0e5758a91793c3f5f8bece49b , < a6b22dbd80926556290ad2243be25218d6956a19 (git) Affected: 65f53e9802dbfae0e5758a91793c3f5f8bece49b , < 563a8573047182f550b1e1e030615755cd8c41da (git) Affected: 65f53e9802dbfae0e5758a91793c3f5f8bece49b , < bb067a99a0356196c0b89a95721985485ebce5a5 (git)
Linux	Linux	Affected: 3.13 Unaffected: 0 , < 3.13 (semver) Unaffected: 5.10.261 , ≤ 5.10.* (semver) Unaffected: 5.15.212 , ≤ 5.15.* (semver) Unaffected: 6.1.178 , ≤ 6.1.* (semver) Unaffected: 6.6.145 , ≤ 6.6.* (semver) Unaffected: 6.12.96 , ≤ 6.12.* (semver) Unaffected: 6.18.39 , ≤ 6.18.* (semver) Unaffected: 7.1.4 , ≤ 7.1.* (semver) Unaffected: 7.2-rc3 , ≤ * (original_commit_for_fix)

Show details on NVD website

JSON

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    "dateReserved": "2026-07-19T15:36:31.786Z",
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      "percentile": "0.07464"
    },
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      "source": "Microsoft CSAF VEX",
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      "version": "1"
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Controller\\nteardown can clear and release that connection concurrently, leaving the\\nnetwork device registration path to dereference a freed parent device.\\n\\nTake a reference to the L2CAP connection while holding the channel lock.\\nRetain it until register_netdev() has taken the parent device reference.\"}],\"affected\":[{\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"affectedData\":[{\"vendor\":\"Linux\",\"product\":\"Linux\",\"defaultStatus\":\"unaffected\",\"programFiles\":[\"net/bluetooth/bnep/core.c\"],\"repo\":\"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\"versions\":[{\"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\",\"status\":\"affected\"}]},{\"vendor\":\"Linux\",\"product\":\"Linux\",\"defaultStatus\":\"affected\",\"programFiles\":[\"net/bluetooth/bnep/core.c\"],\"repo\":\"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\"versions\":[{\"version\":\"3.13\",\"status\":\"affected\"},{\"version\":\"0\",\"lessThan\":\"3.13\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"5.10.261\",\"lessThanOrEqual\":\"5.10.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"5.15.212\",\"lessThanOrEqual\":\"5.15.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.1.178\",\"lessThanOrEqual\":\"6.1.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.6.145\",\"lessThanOrEqual\":\"6.6.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.12.96\",\"lessThanOrEqual\":\"6.12.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.18.39\",\"lessThanOrEqual\":\"6.18.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"7.1.4\",\"lessThanOrEqual\":\"7.1.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"7.2-rc3\",\"lessThanOrEqual\":\"*\",\"versionType\":\"original_commit_for_fix\",\"status\":\"unaffected\"}]}]}],\"metrics\":{\"cvssMetricV31\":[{\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"type\":\"Secondary\",\"cvssData\":{\"version\":\"3.1\",\"vectorString\":\"CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H\",\"baseScore\":8.8,\"baseSeverity\":\"HIGH\",\"attackVector\":\"ADJACENT_NETWORK\",\"attackComplexity\":\"LOW\",\"privilegesRequired\":\"NONE\",\"userInteraction\":\"NONE\",\"scope\":\"UNCHANGED\",\"confidentialityImpact\":\"HIGH\",\"integrityImpact\":\"HIGH\",\"availabilityImpact\":\"HIGH\"},\"exploitabilityScore\":2.8,\"impactScore\":5.9}]},\"references\":[{\"url\":\"https://git.kernel.org/stable/c/390b5db3ff8745187f094c4e915663b7b1f98944\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/46a88784c4c9b96954dd86f747ce93f65efa1302\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/551ae773ec64045b4e72099132654887e0270bcc\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/563a8573047182f550b1e1e030615755cd8c41da\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/a6b22dbd80926556290ad2243be25218d6956a19\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/ae215c5b6422d8eda443b861b124bd1be6969c31\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/bb067a99a0356196c0b89a95721985485ebce5a5\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/df22adc7eafc22e651561813c11dc51a796b12ee\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"}]}}",
    "suse_vex": {
      "aggregate_severity": "not set",
      "current_release_date": "2026-07-25T15:59:54Z",
      "cve": "CVE-2026-64408",
      "id": "CVE-2026-64408",
      "initial_release_date": "2026-07-25T15:59:54Z",
      "source": "SUSE CSAF VEX",
      "status": "interim",
      "title": "SUSE CVE CVE-2026-64408",
      "url": "https://ftp.suse.com/pub/projects/security/csaf-vex/cve-2026-64408.json",
      "version": "2"
    }
  }
}

GHSA-MGRM-7XVJ-2JR3

Vulnerability from github – Published: 2026-07-25 12:31 – Updated: 2026-07-27 06:30

Details

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.

Severity

8.8 (High)


                  
                    CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Show details on source website

JSON

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{
  "affected": [],
  "aliases": [
    "CVE-2026-64408"
  ],
  "database_specific": {
    "cwe_ids": [],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-07-25T10:17:24Z",
    "severity": "HIGH"
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nBluetooth: bnep: pin L2CAP connection during netdev registration\n\nbnep_add_connection() reads the L2CAP connection without holding the\nchannel lock, then passes its HCI device to register_netdev(). Controller\nteardown can clear and release that connection concurrently, leaving the\nnetwork device registration path to dereference a freed parent device.\n\nTake a reference to the L2CAP connection while holding the channel lock.\nRetain it until register_netdev() has taken the parent device reference.",
  "id": "GHSA-mgrm-7xvj-2jr3",
  "modified": "2026-07-27T06:30:36Z",
  "published": "2026-07-25T12:31:34Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-64408"
    },
    {
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      "url": "https://git.kernel.org/stable/c/390b5db3ff8745187f094c4e915663b7b1f98944"
    },
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    },
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      "url": "https://git.kernel.org/stable/c/551ae773ec64045b4e72099132654887e0270bcc"
    },
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    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/df22adc7eafc22e651561813c11dc51a796b12ee"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
      "type": "CVSS_V3"
    }
  ]
}

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.

The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base model, served locally by ML-Gateway. They have not been verified by an analyst and are provided for guidance only.

Action not permitted

CVE-2026-64408 (GCVE-0-2026-64408)

GHSA-MGRM-7XVJ-2JR3

Tags

Sightings

Nomenclature