SB2026050241 - Memory leak in Linux kernel bluetooth
Published: May 2, 2026
Security Bulletin ID
SB2026050241
CSH Severity
Low
Patch available
YES
Number of vulnerabilities
1
Exploitation vector
Local access
Highest impact
Partial DoS
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 1 vulnerability.
1) Memory leak (CVE-ID: CVE-2026-43021)
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 hci_cmd_sync_queue_once error handling when processing Bluetooth HCI command synchronization failures. A local user can trigger an error condition to cause a denial of service.
Remediation
Install update from vendor's website.