SB2026062662 - Memory leak in Linux kernel bluetooth

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Main Vulnerability Database SB2026062662

SB2026062662 - Memory leak in Linux kernel bluetooth

Published: June 26, 2026

Security Bulletin ID SB2026062662
CSH Severity
Low
Patch available
YES
Number of vulnerabilities 1
Exploitation vector Local access
Highest impact Partial DoS

Breakdown by Severity

Low 100%
  • Low
  • Medium
  • High
  • Critical

Description

This security bulletin contains information about 1 vulnerability.


1) Memory leak (CVE-ID: CVE-2026-53252)

CWE-ID: CWE-401 - Missing release of memory after effective lifetime

CVSSv4: CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:U/U:Clear


The vulnerability allows a local user to cause a denial of service.

The vulnerability exists due to a memory leak in bt_host_release() when handling failed Bluetooth HCI device initialization before hci_register_dev() completes. A local user can trigger device initialization failures to cause a denial of service.

The issue occurs because the unregistered device cleanup path bypasses hci_release_dev(), leaving the SRCU structure allocated in hci_alloc_dev() uncleared.


Remediation

Install update from vendor's website.

References