CVE-2023-28464Public exploit

Local privilege escalation via Bluetooth double free

Published Mar 31, 2023 · Updated Aug 2, 2024

A double free in the Bluetooth subsystem of the Linux kernel through 6.2.9 allows local users to escalate privileges during connection cleanup. In net/bluetooth/hci_conn.c, hci_conn_cleanup calls hci_conn_del_sysfs and then releases the same HCI device and connection objects again through hci_dev_put and hci_conn_put. The path requires local low-privileged access and Bluetooth HCI teardown; exploitation corrupts kernel memory, causing a crash or elevated code execution.

CVSS severity7.8
High
EPSS probability0.27%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

A double free in the Bluetooth subsystem of the Linux kernel through 6.2.9 allows local users to escalate privileges during connection cleanup. In net/bluetooth/hci_conn.c, hci_conn_cleanup calls hci_conn_del_sysfs and then releases the same HCI device and connection objects again through hci_dev_put and hci_conn_put. The path requires local low-privileged access and Bluetooth HCI teardown; exploitation corrupts kernel memory, causing a crash or elevated code execution.

The record

CVE
CVE-2023-28464
Published
Mar 31, 2023
Updated
Aug 2, 2024
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-415, T1068
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Mar 31, 2023CVE publishedPublication date reported by the CVE source.
  2. Aug 2, 2024Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Affected buildAffected product and version details are unavailable.

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

Affected products and versions are unavailable in this record.

Published CVSS scores

7.8Canonical UbuntuCVSS: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 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-415Double Free
T1068Exploitation for Privilege Escalation

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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