CVE-2024-56757

Kernel panic via unreleased Bluetooth USB interface

Published Jan 6, 2025 · Updated Aug 5, 2026

Improper resource release in Linux kernel 6.11 through 6.12.7 allows local users to crash the kernel during MediaTek USB disconnect. The btusb MediaTek disconnect path unregisters the HCI device before releasing its claimed ISO USB interface, allowing the stale interface to reenter btusb_disconnect and dereference freed kernel objects. Exploitation requires local access to detach or unbind a matching device, or access to USB emulation; the bounded consequence established by the original advisory is a kernel panic.

CVSS severity7.8
High
EPSS probability0.23%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Improper resource release in Linux kernel 6.11 through 6.12.7 allows local users to crash the kernel during MediaTek USB disconnect. The btusb MediaTek disconnect path unregisters the HCI device before releasing its claimed ISO USB interface, allowing the stale interface to reenter btusb_disconnect and dereference freed kernel objects. Exploitation requires local access to detach or unbind a matching device, or access to USB emulation; the bounded consequence established by the original advisory is a kernel panic.

The record

CVE
CVE-2024-56757
Published
Jan 6, 2025
Updated
Aug 5, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
CWE-404, T1499.004
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Jan 6, 2025CVE 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=6.11
  2. Affected versionversion=ceac1cb0259de682d78f5c784ef8e0b13022e9d9 <489304e67087abddc2666c5af0159cb95afdcf59
  3. Affected versionversion=ceac1cb0259de682d78f5c784ef8e0b13022e9d9 <cc569d791ab2a0de74f76e470515d25d24c9b84b

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=6.11; version=ceac1cb0259de682d78f5c784ef8e0b13022e9d9 <489304e67087abddc2666c5af0159cb95afdcf59; version=ceac1cb0259de682d78f5c784ef8e0b13022e9d9 <cc569d791ab2a0de74f76e470515d25d24c9b84b

Published CVSS scores

5.5CISA-ADPCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
5.5NIST NVDCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
7.8kernel.orgCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/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 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-404Improper Resource Shutdown or Release
T1499.004Application or System Exploitation

Public exploit references

No public exploit references are available in this record.

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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