Vulnerability-Lookup

FKIE_CVE-2024-42132

Vulnerability from fkie_nvd - Published: 2024-07-30 08:15 - Updated: 2026-08-04 11:19

Severity

7.6 (High) - CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:H
7.1 (High) - CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:H

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.

References

URL	Tags
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/1cc18c2ab2e8c54c355ea7c0423a636e415a0c23	Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/2ae8d7742a09c275872e670c53337b3dcedaa11c
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/4970e48f83dbd21d2a6a7cdaaafc2a71f7f45dc4	Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/d311036696fed778301d08a71a4bef737b86d8c5	Patch
af854a3a-2127-422b-91ae-364da2661108	https://git.kernel.org/stable/c/1cc18c2ab2e8c54c355ea7c0423a636e415a0c23	Patch
af854a3a-2127-422b-91ae-364da2661108	https://git.kernel.org/stable/c/4970e48f83dbd21d2a6a7cdaaafc2a71f7f45dc4	Patch
af854a3a-2127-422b-91ae-364da2661108	https://git.kernel.org/stable/c/d311036696fed778301d08a71a4bef737b86d8c5	Patch

Impacted products

Vendor	Product	Version
linux	linux_kernel	*
linux	linux_kernel	*
linux	linux_kernel	*
linux	linux_kernel	6.10
linux	linux_kernel	6.10
linux	linux_kernel	6.10
linux	linux_kernel	6.10
linux	linux_kernel	6.10
linux	linux_kernel	6.10

JSON

To clipboard

{
  "affected": [
    {
      "affectedData": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "net/bluetooth/hci_conn.c"
          ],
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          "vendor": "Linux",
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            },
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              "versionType": "git"
            },
            {
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              "status": "affected",
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              "versionType": "git"
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            },
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            },
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            },
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              "status": "affected",
              "version": "6.5.12",
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          ]
        },
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          "product": "Linux",
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          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
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              "version": "6.7"
            },
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              "version": "0",
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            },
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            },
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              "status": "unaffected",
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    }
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    },
    {
      "lang": "es",
      "value": " En el kernel de Linux, se resolvi\u00f3 la siguiente vulnerabilidad: bluetooth/hci: no permitir configuraci\u00f3n de identificador mayor que HCI_CONN_HANDLE_MAX Advertencia de activaci\u00f3n de Syzbot en hci_conn_del() causada por la liberaci\u00f3n del identificador que no se asign\u00f3 mediante el asignador de ida. Esto se debe a un identificador mayor que HCI_CONN_HANDLE_MAX pasado por hci_le_big_sync_establecido_evt(), lo que hace que el c\u00f3digo piense que es una conexi\u00f3n no configurada. Agregue la misma verificaci\u00f3n para el l\u00edmite superior del controlador que en hci_conn_set_handle() para evitar advertencias."
    }
  ],
  "id": "CVE-2024-42132",
  "lastModified": "2026-08-04T11:19:37.430",
  "metrics": {
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          "attackComplexity": "LOW",
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  ]
}

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

Vulnerability from cvelistv5 – Published: 2024-07-30 07:46 – Updated: 2026-08-05 11:35

Title

bluetooth/hci: disallow setting handle bigger than HCI_CONN_HANDLE_MAX

Summary

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 · CISA-ADP (v2.0.3)

Decision recorded 2024-09-10 16:16 UTC

Assigner

Linux mitre root Scorecard

References

4 references

URL	Tags
https://git.kernel.org/stable/c/2ae8d7742a09c2758…
https://git.kernel.org/stable/c/4970e48f83dbd21d2…
https://git.kernel.org/stable/c/d311036696fed7783…
https://git.kernel.org/stable/c/1cc18c2ab2e8c54c3…

Impacted products

2 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)
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)

Show details on NVD website

JSON

To clipboard

{
  "containers": {
    "adp": [
      {
        "providerMetadata": {
          "dateUpdated": "2024-08-02T04:54:31.923Z",
          "orgId": "af854a3a-2127-422b-91ae-364da2661108",
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        "title": "CVE Program Container"
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      {
        "metrics": [
          {
            "other": {
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                "id": "CVE-2024-42132",
                "options": [
                  {
                    "Exploitation": "none"
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                  },
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        "title": "CISA ADP Vulnrichment"
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    ],
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          "programFiles": [
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            {
              "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."
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-08-05T11:35:49.667Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "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"
        }
      ],
      "title": "bluetooth/hci: disallow setting handle bigger than HCI_CONN_HANDLE_MAX",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2024-42132",
    "datePublished": "2024-07-30T07:46:27.684Z",
    "dateReserved": "2024-07-29T15:50:41.186Z",
    "dateUpdated": "2026-08-05T11:35:49.667Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}

Sightings

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FKIE_CVE-2024-42132

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

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