CVE-2026-53364

Local service interruption via Bluetooth memory leak

Published Jul 13, 2026 · Updated Jul 13, 2026

Memory leak in the Linux Kernel Bluetooth subsystem allows local users to interrupt service through PA and BIG sync state handling. The hci_le_big_terminate() function allocates iso_list_data with kzalloc_obj, then returns without freeing it when both termination flags remain clear. Exploitation requires local low-privileged access and reachability of the Bluetooth ISO synchronization teardown path; confidentiality and integrity are unaffected.

CVSS severity5.5
Medium
EPSS probability0.13%
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 Linux Kernel Bluetooth subsystem allows local users to interrupt service through PA and BIG sync state handling. The hci_le_big_terminate() function allocates iso_list_data with kzalloc_obj, then returns without freeing it when both termination flags remain clear. Exploitation requires local low-privileged access and reachability of the Bluetooth ISO synchronization teardown path; confidentiality and integrity are unaffected.

The record

CVE
CVE-2026-53364
Published
Jul 13, 2026
Updated
Jul 13, 2026
Vendor
The Linux Kernel Organization
Product
Linux Kernel
Classifications
CWE-401, T1499.004
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Jul 13, 2026CVE publishedPublication date reported by the CVE source.
  2. Jul 13, 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=087812a6119b4cd5c9d658b48aee40a25707a1c6
  2. Affected versionversion=6.16.4 <6.17
  3. Affected versionversion=6.17
  4. Affected versionversion=a7bcffc673de219af2698fbb90627016233de67b <a59d4f4217e6200ca9180643e5738a87d3fa8be0
  5. Affected versionversion=a7bcffc673de219af2698fbb90627016233de67b <bfa9d28960ed677d556bdf097073bc3129686229
  6. Affected versionversion=a7bcffc673de219af2698fbb90627016233de67b <e6b78019664dfe37c3dc707f50e7b453d6c7726d

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linux Kernelversion=087812a6119b4cd5c9d658b48aee40a25707a1c6; version=6.16.4 <6.17; version=6.17; version=a7bcffc673de219af2698fbb90627016233de67b <a59d4f4217e6200ca9180643e5738a87d3fa8be0; version=a7bcffc673de219af2698fbb90627016233de67b <bfa9d28960ed677d556bdf097073bc3129686229; version=a7bcffc673de219af2698fbb90627016233de67b <e6b78019664dfe37c3dc707f50e7b453d6c7726d

Published CVSS scores

5.5NIST NVDCVSS: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.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

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
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-401Missing Release of Memory after Effective Lifetime
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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