CVE-2023-53828

Kernel compromise via stale Bluetooth monitor reference

Published Dec 9, 2025 · Updated Aug 5, 2026

Use-after-free in the Linux kernel Bluetooth subsystem allows local users to compromise the kernel through a rejected monitor request. On an error path, msft_le_monitor_advertisement_cb frees the adv_monitor object before hci_add_adv_monitor passes monitor->handle to bt_dev_dbg. Reaching the path requires a trusted local AF_BLUETOOTH management socket, and a rejected request can disclose or corrupt kernel memory or panic the host.

CVSS severity7.8
High
EPSS probability0.19%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Use-after-free in the Linux kernel Bluetooth subsystem allows local users to compromise the kernel through a rejected monitor request. On an error path, msft_le_monitor_advertisement_cb frees the adv_monitor object before hci_add_adv_monitor passes monitor->handle to bt_dev_dbg. Reaching the path requires a trusted local AF_BLUETOOTH management socket, and a rejected request can disclose or corrupt kernel memory or panic the host.

The record

CVE
CVE-2023-53828
Published
Dec 9, 2025
Updated
Aug 5, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
T1068
Attack vector
local
Privileges
Unavailable

Timeline

How it unfolded

  1. Dec 9, 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=6.0
  2. Affected versionversion=b747a83690c8f53bc7a3f75899415c699b2c51aa <81d8e9f59df63b8358751c1ffed9f1cf5c796909
  3. Affected versionversion=b747a83690c8f53bc7a3f75899415c699b2c51aa <8d66f7ced51cb924bc90278d6a0a26a52877271a
  4. Affected versionversion=b747a83690c8f53bc7a3f75899415c699b2c51aa <a2bcd2b63271a93a695fabbfbf459c603d956d48
  5. Affected versionversion=b747a83690c8f53bc7a3f75899415c699b2c51aa <aafda69d4807f5edf3558c9534be9b911774e63a

What conditions does exploitation require?

Attack vectorlocal
Required privilegesUnavailable in this record.

What is affected?

The Linux Kernel Organization · Linuxversion=6.0; version=b747a83690c8f53bc7a3f75899415c699b2c51aa <81d8e9f59df63b8358751c1ffed9f1cf5c796909; version=b747a83690c8f53bc7a3f75899415c699b2c51aa <8d66f7ced51cb924bc90278d6a0a26a52877271a; version=b747a83690c8f53bc7a3f75899415c699b2c51aa <a2bcd2b63271a93a695fabbfbf459c603d956d48; version=b747a83690c8f53bc7a3f75899415c699b2c51aa <aafda69d4807f5edf3558c9534be9b911774e63a

Published CVSS scores

7.8Linux kernel CVE teamCVSS: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
PrivilegesUnavailable
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

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Your stack

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