SB2026102232 - Improper update of reference count in Linux kernel bluetooth

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Main Vulnerability Database SB2026102232

SB2026102232 - Improper update of reference count in Linux kernel bluetooth

Published: October 22, 2026

Security Bulletin ID SB2026102232
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) Improper update of reference count (CVE-ID: CVE-2026-98462)

CWE-ID: CWE-911 - Improper Update of Reference Count

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 potentially cause a denial of service through premature release of Bluetooth connection objects.

The vulnerability exists due to improper reference counting in the Linux kernel Bluetooth hci_bind_cis() and hci_connect_cis() functions when reusing connected isochronous stream (CIS) connections or handling configuration failures. A local user can trigger affected connection-handling paths to cause connection holds to be dropped without a corresponding acquisition, potentially leading to premature object release and a kernel crash.


Remediation

Install update from vendor's website.

References