CVE-2023-52518

Local service interruption via Bluetooth codec-list leak

Published Mar 2, 2024 · Updated May 11, 2026

Resource exhaustion in the Linux kernel allows local users to interrupt service by repeatedly cycling a supported Bluetooth controller. Device close and release paths fail to call hci_codec_list_clear, leaving entries allocated in the local_codecs list after use. A reachable HCI controller that reports codec capabilities is required; each cycle leaks kernel memory without exposing or modifying data.

CVSS severity5.5
Medium
EPSS probability0.24%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Resource exhaustion in the Linux kernel allows local users to interrupt service by repeatedly cycling a supported Bluetooth controller. Device close and release paths fail to call hci_codec_list_clear, leaving entries allocated in the local_codecs list after use. A reachable HCI controller that reports codec capabilities is required; each cycle leaks kernel memory without exposing or modifying data.

The record

CVE
CVE-2023-52518
Published
Mar 2, 2024
Updated
May 11, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
CWE-770, T1499.004
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Mar 2, 2024CVE publishedPublication date reported by the CVE source.
  2. May 11, 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=5.16
  2. Affected versionversion=8961987f3f5fa2f2618e72304d013c8dd5e604a6 <626535077ba9dc110787540d1fe24881094c15a1
  3. Affected versionversion=8961987f3f5fa2f2618e72304d013c8dd5e604a6 <b938790e70540bf4f2e653dcd74b232494d06c8f
  4. Affected versionversion=8961987f3f5fa2f2618e72304d013c8dd5e604a6 <eea5a8f0c3b7c884d2351e75fbdd0a3d7def5ae1

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=5.16; version=8961987f3f5fa2f2618e72304d013c8dd5e604a6 <626535077ba9dc110787540d1fe24881094c15a1; version=8961987f3f5fa2f2618e72304d013c8dd5e604a6 <b938790e70540bf4f2e653dcd74b232494d06c8f; version=8961987f3f5fa2f2618e72304d013c8dd5e604a6 <eea5a8f0c3b7c884d2351e75fbdd0a3d7def5ae1

Published CVSS scores

5.5CISA-ADPCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/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 exploitUnconfirmed

Weakness, pattern, technique

CWE-770Allocation of Resources Without Limits or Throttling
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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