SB20260812131 - Use-after-free in Linux kernel bluetooth driver

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Main Vulnerability Database SB20260812131

SB20260812131 - Use-after-free in Linux kernel bluetooth driver

Published: August 12, 2026

Security Bulletin ID SB20260812131
CSH Severity
Low
Patch available
YES
Number of vulnerabilities 1
Exploitation vector Local access
Highest impact Denial of service

Breakdown by Severity

Low 100%
  • Low
  • Medium
  • High
  • Critical

Description

This security bulletin contains information about 1 vulnerability.


1) Use-after-free (CVE-ID: CVE-2026-68389)

CWE-ID: CWE-416 - Use After Free

CVSSv4: 6.8 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N]


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

The vulnerability exists due to a use-after-free in qca_controller_memdump() in the Qualcomm Bluetooth hci_qca driver when processing a controller-reported memdump with an invalid zero dump size. A local user can trigger a crafted invalid memdump condition to cause a denial of service.

The issue can leave memdump collection state stale and IBS disabled after the aborted dump, which may block waiters or later transmit handling.


Remediation

Install update from vendor's website.

References