CVE-2024-42133Public exploit

Bluetooth disruption via oversized BIG handle

Published Jul 30, 2024 · Updated Aug 5, 2026

Improper handle validation in the Linux kernel Bluetooth subsystem allows physically proximate attackers to disrupt Bluetooth through a BIG event. The hci_le_big_sync_established_evt path accepts a BIS handle above 0x0eff, creates a bogus unset hci_conn, and later releases an IDA identifier that was never allocated for that handle. An unpaired device in radio range can reach the path when the host is configured as a LE Audio or Auracast ISO sink; teardown triggers a kernel warning, which becomes a panic when panic_on_warn is enabled, and can also desynchronize Bluetooth connection state.

CVSS severity7.6
High
EPSS probability0.30%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Improper handle validation in the Linux kernel Bluetooth subsystem allows physically proximate attackers to disrupt Bluetooth through a BIG event. The hci_le_big_sync_established_evt path accepts a BIS handle above 0x0eff, creates a bogus unset hci_conn, and later releases an IDA identifier that was never allocated for that handle. An unpaired device in radio range can reach the path when the host is configured as a LE Audio or Auracast ISO sink; teardown triggers a kernel warning, which becomes a panic when panic_on_warn is enabled, and can also desynchronize Bluetooth connection state.

The record

CVE
CVE-2024-42133
Published
Jul 30, 2024
Updated
Aug 5, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
T1499.004
Attack vector
adjacent
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jul 30, 2024CVE publishedPublication date reported by the CVE source.
  2. Aug 5, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=181a42edddf51d5d9697ecdf365d72ebeab5afb0 <015d79c96d62cd8a4a359fcf5be40d58088c936b
  2. Affected versionversion=181a42edddf51d5d9697ecdf365d72ebeab5afb0 <dad0003ccc68457baf005a6ed75b4d321463fe3d
  3. Affected versionversion=6.5.12 <6.6
  4. Affected versionversion=6.6.2 <6.6.39
  5. Affected versionversion=6.7
  6. Affected versionversion=84cb0143fb8a03bf941c7aaedd56c938c99dafad <38263088b845abeeeb98dda5b87c0de3063b6dbb
  7. Affected versionversion=e9f708beada55426c8d678e2f46af659eb5bf4f0
  8. Affected versionversion=f7e83f2278f06b577e3c92ea2f4e8e8c6fc72a8f <a06a8cc80fa203fde828a8429583f7e4fe27eca4

What conditions does exploitation require?

Attack vectoradjacent
Required privilegesunauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=181a42edddf51d5d9697ecdf365d72ebeab5afb0 <015d79c96d62cd8a4a359fcf5be40d58088c936b; version=181a42edddf51d5d9697ecdf365d72ebeab5afb0 <dad0003ccc68457baf005a6ed75b4d321463fe3d; version=6.5.12 <6.6; version=6.6.2 <6.6.39; version=6.7; version=84cb0143fb8a03bf941c7aaedd56c938c99dafad <38263088b845abeeeb98dda5b87c0de3063b6dbb; version=e9f708beada55426c8d678e2f46af659eb5bf4f0; version=f7e83f2278f06b577e3c92ea2f4e8e8c6fc72a8f <a06a8cc80fa203fde828a8429583f7e4fe27eca4

Published CVSS scores

5.5NIST NVDCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
7.6Linux kernel CNACVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

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No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectoradjacent
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

T1499.004Application or System Exploitation

Public exploit references

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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