CVE-2023-53017

Local service interruption via Bluetooth memory leak

Published Mar 27, 2025 · Updated May 11, 2026

Memory leak in the Bluetooth hci_sync component in Linux 6.1 through 6.1.8 allows local users to exhaust kernel memory. When hci_cmd_sync_queue() fails in hci_update_adv_data(), the error path leaves the allocated inst_ptr object unreleased after its effective lifetime. Low-privileged local access is required, and repeated failures consume kernel memory until service is interrupted without disclosing or modifying data.

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

What happened

Memory leak in the Bluetooth hci_sync component in Linux 6.1 through 6.1.8 allows local users to exhaust kernel memory. When hci_cmd_sync_queue() fails in hci_update_adv_data(), the error path leaves the allocated inst_ptr object unreleased after its effective lifetime. Low-privileged local access is required, and repeated failures consume kernel memory until service is interrupted without disclosing or modifying data.

The record

CVE
CVE-2023-53017
Published
Mar 27, 2025
Updated
May 11, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
CWE-401, T1499
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Mar 27, 2025CVE 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

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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=6.1
  2. Affected versionversion=651cd3d65b0f76a2198fcf3a80ce5d53dd267717 <1ed8b37cbaf14574c779064ef1372af62e8ba6aa
  3. Affected versionversion=651cd3d65b0f76a2198fcf3a80ce5d53dd267717 <8ac6043bd3e5b58d30f50737aedc2e58e8087ad5

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=6.1; version=651cd3d65b0f76a2198fcf3a80ce5d53dd267717 <1ed8b37cbaf14574c779064ef1372af62e8ba6aa; version=651cd3d65b0f76a2198fcf3a80ce5d53dd267717 <8ac6043bd3e5b58d30f50737aedc2e58e8087ad5

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-401Missing Release of Memory after Effective Lifetime
T1499Endpoint Denial of Service

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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