CVE-2023-54210

Freed-memory access via Bluetooth monitor logging

Published Dec 30, 2025 · Updated Dec 30, 2025

Use-after-free in affected Linux kernel branches from 6.0 allows local users to trigger invalid access during Bluetooth monitor removal. The hci_remove_adv_monitor() path calls bt_dev_dbg() with monitor data after msft_remove_monitor() can free that structure. Reachability requires the Microsoft extended advertisement-monitor path; published evidence establishes an invalid kernel access but no dependable further impact.

CVSS severity7.0
High
EPSS probability0.14%
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 affected Linux kernel branches from 6.0 allows local users to trigger invalid access during Bluetooth monitor removal. The hci_remove_adv_monitor() path calls bt_dev_dbg() with monitor data after msft_remove_monitor() can free that structure. Reachability requires the Microsoft extended advertisement-monitor path; published evidence establishes an invalid kernel access but no dependable further impact.

The record

CVE
CVE-2023-54210
Published
Dec 30, 2025
Updated
Dec 30, 2025
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
Unavailable
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Dec 30, 2025CVE publishedPublication date reported by the CVE source.
  2. Dec 30, 2025Record 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=6.0
  2. Affected versionversion=7cf5c2978f23fdbb2dd7b4e8b07e362ae2d8211c <0d4d6b083da9b033ddccef72d77f373c819ae3ea
  3. Affected versionversion=7cf5c2978f23fdbb2dd7b4e8b07e362ae2d8211c <bf00c2c8f6254f44ac041aa9a311ae9e0caf692b
  4. Affected versionversion=7cf5c2978f23fdbb2dd7b4e8b07e362ae2d8211c <de6dfcefd107667ce2dbedf4d9337f5ed557a4a1

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=6.0; version=7cf5c2978f23fdbb2dd7b4e8b07e362ae2d8211c <0d4d6b083da9b033ddccef72d77f373c819ae3ea; version=7cf5c2978f23fdbb2dd7b4e8b07e362ae2d8211c <bf00c2c8f6254f44ac041aa9a311ae9e0caf692b; version=7cf5c2978f23fdbb2dd7b4e8b07e362ae2d8211c <de6dfcefd107667ce2dbedf4d9337f5ed557a4a1

Published CVSS scores

7.0Amazon LinuxCVSS:3.1/AV:L/AC:H/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 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 exploitUnconfirmed

Weakness, pattern, technique

No sourced classifications are available.

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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