CVE-2024-36012

Local privilege escalation via Bluetooth teardown race

Published May 23, 2024 · Updated Aug 5, 2026

Use-after-free in the Linux Bluetooth Microsoft extension allows local users to gain kernel privileges through an HCI teardown race. The msft_do_close function retains msft_data while msft_unregister clears and frees the same object, then locks its freed filter_lock. A local user with HCI device-management access can race adapter power-down against transport teardown, enabling kernel reads, writes, panic, or privilege escalation.

CVSS severity7.8
High
EPSS probability0.21%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
Coverage for this vulnerability

See if you're affected

Explore vulnerability checks for your environment with Hinoki.

Book a demo

Summary

What happened

Use-after-free in the Linux Bluetooth Microsoft extension allows local users to gain kernel privileges through an HCI teardown race. The msft_do_close function retains msft_data while msft_unregister clears and frees the same object, then locks its freed filter_lock. A local user with HCI device-management access can race adapter power-down against transport teardown, enabling kernel reads, writes, panic, or privilege escalation.

The record

CVE
CVE-2024-36012
Published
May 23, 2024
Updated
Aug 5, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
T1068
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. May 23, 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

Compare your product and version with the public record. A matching version still requires validation against your environment.

Is a vulnerable build present?

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

  1. Affected versionversion=5.12
  2. Affected versionversion=bf6a4e30ffbd9e9ef8934582feb937f6532f8b68 <10f9f426ac6e752c8d87bf4346930ba347aaabac
  3. Affected versionversion=bf6a4e30ffbd9e9ef8934582feb937f6532f8b68 <4f1de02de07748da80a8178879bc7a1df37fdf56
  4. Affected versionversion=bf6a4e30ffbd9e9ef8934582feb937f6532f8b68 <a85a60e62355e3bf4802dead7938966824b23940
  5. Affected versionversion=bf6a4e30ffbd9e9ef8934582feb937f6532f8b68 <e3880b531b68f98d3941d83f2f6dd11cf4fd6b76

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=5.12; version=bf6a4e30ffbd9e9ef8934582feb937f6532f8b68 <10f9f426ac6e752c8d87bf4346930ba347aaabac; version=bf6a4e30ffbd9e9ef8934582feb937f6532f8b68 <4f1de02de07748da80a8178879bc7a1df37fdf56; version=bf6a4e30ffbd9e9ef8934582feb937f6532f8b68 <a85a60e62355e3bf4802dead7938966824b23940; version=bf6a4e30ffbd9e9ef8934582feb937f6532f8b68 <e3880b531b68f98d3941d83f2f6dd11cf4fd6b76

Published CVSS scores

7.8LinuxCVSS: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.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

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

T1068Exploitation for Privilege Escalation

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

See the directory against your own environment.

Your stack

Check the software in your environment

Book a demo to see how Hinoki identifies affected software and validates exploitability in your environment.

Book a demo