CVE-2024-42132 (GCVE-0-2024-42132)

Vulnerability from cvelistv5 – Published: 2024-07-30 07:46 – Updated: 2026-08-05 11:35
VLAI
Title
bluetooth/hci: disallow setting handle bigger than HCI_CONN_HANDLE_MAX
Summary
In the Linux kernel, the following vulnerability has been resolved: bluetooth/hci: disallow setting handle bigger than HCI_CONN_HANDLE_MAX Syzbot hit warning in hci_conn_del() caused by freeing handle that was not allocated using ida allocator. This is caused by handle bigger than HCI_CONN_HANDLE_MAX passed by hci_le_big_sync_established_evt(), which makes code think it's unset connection. Add same check for handle upper bound as in hci_conn_set_handle() to prevent warning.
Severity
7.6 (High)
CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:H
SSVC
Exploitation: none Automatable: no Technical Impact: partial
CISA Coordinator (v2.0.3)
Assigner
References
Impacted products
Vendor Product Version
Linux Linux Affected: f7e83f2278f06b577e3c92ea2f4e8e8c6fc72a8f , < 2ae8d7742a09c275872e670c53337b3dcedaa11c (git)
Affected: 84cb0143fb8a03bf941c7aaedd56c938c99dafad , < 4970e48f83dbd21d2a6a7cdaaafc2a71f7f45dc4 (git)
Affected: 181a42edddf51d5d9697ecdf365d72ebeab5afb0 , < d311036696fed778301d08a71a4bef737b86d8c5 (git)
Affected: 181a42edddf51d5d9697ecdf365d72ebeab5afb0 , < 1cc18c2ab2e8c54c355ea7c0423a636e415a0c23 (git)
Affected: e9f708beada55426c8d678e2f46af659eb5bf4f0 (git)
Affected: 6.6.2 , < 6.6.39 (semver)
Affected: 6.5.12 , < 6.6 (semver)
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Linux Linux Affected: 6.7
Unaffected: 0 , < 6.7 (semver)
Unaffected: 6.6.39 , ≤ 6.6.* (semver)
Unaffected: 6.9.9 , ≤ 6.9.* (semver)
Unaffected: 6.10 , ≤ * (original_commit_for_fix)
Create a notification for this product.
Show details on NVD website
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    },
    "vulnrichment": {
      "containers": "{\"adp\": [{\"title\": \"CVE Program Container\", \"references\": [{\"url\": \"https://git.kernel.org/stable/c/4970e48f83dbd21d2a6a7cdaaafc2a71f7f45dc4\", \"tags\": [\"x_transferred\"]}, {\"url\": \"https://git.kernel.org/stable/c/d311036696fed778301d08a71a4bef737b86d8c5\", \"tags\": [\"x_transferred\"]}, {\"url\": \"https://git.kernel.org/stable/c/1cc18c2ab2e8c54c355ea7c0423a636e415a0c23\", \"tags\": [\"x_transferred\"]}], \"providerMetadata\": {\"orgId\": \"af854a3a-2127-422b-91ae-364da2661108\", \"shortName\": \"CVE\", \"dateUpdated\": \"2024-08-02T04:54:31.923Z\"}}, {\"title\": \"CISA ADP Vulnrichment\", \"metrics\": [{\"other\": {\"type\": \"ssvc\", \"content\": {\"id\": \"CVE-2024-42132\", \"role\": \"CISA Coordinator\", \"options\": [{\"Exploitation\": \"none\"}, {\"Automatable\": \"no\"}, {\"Technical Impact\": \"partial\"}], \"version\": \"2.0.3\", \"timestamp\": \"2024-09-10T16:16:22.191923Z\"}}}], \"providerMetadata\": {\"orgId\": \"134c704f-9b21-4f2e-91b3-4a467353bcc0\", \"shortName\": \"CISA-ADP\", \"dateUpdated\": \"2024-09-11T12:42:24.738Z\"}}], \"cna\": {\"title\": \"bluetooth/hci: disallow setting handle bigger than HCI_CONN_HANDLE_MAX\", \"metrics\": [{\"cvssV3_1\": {\"version\": \"3.1\", \"baseScore\": 7.6, \"baseSeverity\": \"HIGH\", \"vectorString\": \"CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:H\"}, \"scenarios\": [{\"lang\": \"en\", \"value\": \"AV:A - The vulnerable code is the Bluetooth HCI event path (`hci_le_cis_req_evt`/`hci_le_big_sync_established_evt`), driven by LE CIS requests and BIG sync establishment initiated by a remote peer in radio range. Per Bluetooth scoring convention this is Adjacent.\\nAC:L - No race, no memory-layout grooming, and no timing dependency \\u2014 a single HCI event carrying a connection handle above 0x0eff deterministically creates a bogus \\\"unset\\\" hci_conn whose teardown always hits the ida_free WARN.\\nPR:N - LE ACL connections and broadcast/PA sync require no pairing, bonding, or authentication, and no local account is needed; the attacker only needs to be an unauthenticated peer in range of a host with LE Audio/ISO enabled.\\nUI:N - The event handlers run automatically in `hci_rx_work` as part of normal LE connection and broadcast-sync processing; no victim action is required.\\nS:U - The corruption is confined to the kernel\u0027s own Bluetooth connection and IDA state within the same security authority; no VM, IOMMU, or sandbox boundary is crossed.\\nC:L - The `WARN(1, ...)` in `ida_free()` emits a full register and stack backtrace containing kernel text and heap addresses, giving a bounded KASLR-defeating info leak; there is no arbitrary read primitive.\\nI:L - The erroneous `ida_free()` desynchronizes `hdev-\u003eunset_handle_ida`, releasing an ID still owned by another connection so the same handle can be issued twice and `hci_conn_hash_lookup_handle()` resolves to the wrong connection; the out-of-range handle also corrupts the PB/BC flag bits of outgoing ACL/ISO headers. This is bounded kernel-state modification, not an arbitrary write.\\nA:H - The bug reliably triggers a kernel WARNING, which is a panic on the many deployments (Android, CI, hardened distros) running with `panic_on_warn`, and the resulting duplicate-handle confusion persistently disrupts Bluetooth connection handling.\"}]}], \"affected\": [{\"repo\": \"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\", \"vendor\": \"Linux\", \"product\": \"Linux\", \"versions\": [{\"status\": \"affected\", \"version\": \"f7e83f2278f06b577e3c92ea2f4e8e8c6fc72a8f\", \"lessThan\": \"2ae8d7742a09c275872e670c53337b3dcedaa11c\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"84cb0143fb8a03bf941c7aaedd56c938c99dafad\", \"lessThan\": \"4970e48f83dbd21d2a6a7cdaaafc2a71f7f45dc4\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"181a42edddf51d5d9697ecdf365d72ebeab5afb0\", \"lessThan\": \"d311036696fed778301d08a71a4bef737b86d8c5\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"181a42edddf51d5d9697ecdf365d72ebeab5afb0\", \"lessThan\": \"1cc18c2ab2e8c54c355ea7c0423a636e415a0c23\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"e9f708beada55426c8d678e2f46af659eb5bf4f0\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"6.6.2\", \"lessThan\": \"6.6.39\", \"versionType\": \"semver\"}, {\"status\": \"affected\", \"version\": \"6.5.12\", \"lessThan\": \"6.6\", \"versionType\": \"semver\"}], \"programFiles\": [\"net/bluetooth/hci_conn.c\"], \"defaultStatus\": \"unaffected\"}, {\"repo\": \"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\", \"vendor\": \"Linux\", \"product\": \"Linux\", \"versions\": [{\"status\": \"affected\", \"version\": \"6.7\"}, {\"status\": \"unaffected\", \"version\": \"0\", \"lessThan\": \"6.7\", \"versionType\": \"semver\"}, {\"status\": \"unaffected\", \"version\": \"6.6.39\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"6.6.*\"}, {\"status\": \"unaffected\", \"version\": \"6.9.9\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"6.9.*\"}, {\"status\": \"unaffected\", \"version\": \"6.10\", \"versionType\": \"original_commit_for_fix\", \"lessThanOrEqual\": \"*\"}], \"programFiles\": [\"net/bluetooth/hci_conn.c\"], \"defaultStatus\": \"affected\"}], \"references\": [{\"url\": \"https://git.kernel.org/stable/c/2ae8d7742a09c275872e670c53337b3dcedaa11c\"}, {\"url\": \"https://git.kernel.org/stable/c/4970e48f83dbd21d2a6a7cdaaafc2a71f7f45dc4\"}, {\"url\": \"https://git.kernel.org/stable/c/d311036696fed778301d08a71a4bef737b86d8c5\"}, {\"url\": \"https://git.kernel.org/stable/c/1cc18c2ab2e8c54c355ea7c0423a636e415a0c23\"}], \"x_generator\": {\"engine\": \"bippy-1.2.0\"}, \"descriptions\": [{\"lang\": \"en\", \"value\": \"In the Linux kernel, the following vulnerability has been resolved:\\n\\nbluetooth/hci: disallow setting handle bigger than HCI_CONN_HANDLE_MAX\\n\\nSyzbot hit warning in hci_conn_del() caused by freeing handle that was\\nnot allocated using ida allocator.\\n\\nThis is caused by handle bigger than HCI_CONN_HANDLE_MAX passed by\\nhci_le_big_sync_established_evt(), which makes code think it\u0027s unset\\nconnection.\\n\\nAdd same check for handle upper bound as in hci_conn_set_handle() to\\nprevent warning.\"}], \"cpeApplicability\": [{\"nodes\": [{\"negate\": false, \"cpeMatch\": [{\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"6.6.39\", \"versionStartIncluding\": \"6.6.2\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"6.9.9\", \"versionStartIncluding\": \"6.7\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"6.10\", \"versionStartIncluding\": \"6.7\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionStartIncluding\": \"6.5.12\"}], \"operator\": \"OR\"}]}], \"providerMetadata\": {\"orgId\": \"416baaa9-dc9f-4396-8d5f-8c081fb06d67\", \"shortName\": \"Linux\", \"dateUpdated\": \"2026-08-05T11:35:49.667Z\"}}}",
      "cveMetadata": "{\"cveId\": \"CVE-2024-42132\", \"state\": \"PUBLISHED\", \"dateUpdated\": \"2026-08-05T11:35:49.667Z\", \"dateReserved\": \"2024-07-29T15:50:41.186Z\", \"assignerOrgId\": \"416baaa9-dc9f-4396-8d5f-8c081fb06d67\", \"datePublished\": \"2024-07-30T07:46:27.684Z\", \"assignerShortName\": \"Linux\"}",
      "dataType": "CVE_RECORD",
      "dataVersion": "5.2"
    }
  }
}



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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.


Detection rules are retrieved from Rulezet.