SB2026050974 - Use-after-free in Linux kernel bluetooth
Published: May 9, 2026
Security Bulletin ID
SB2026050974
CSH Severity
Low
Patch available
YES
Number of vulnerabilities
1
Exploitation vector
Local access
Highest impact
Denial of service
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 1 vulnerability.
1) Use-after-free (CVE-ID: CVE-2026-43322)
CWE-ID: CWE-416 - Use After Free
CVSSv4: 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/E:U/U:Clear
The vulnerability allows a local user to cause a denial of service.
The vulnerability exists due to a use-after-free in le_read_features_complete in the Bluetooth hci_sync subsystem when processing Bluetooth Low Energy remote feature completion events. A local user can trigger a race condition that causes a freed hci_conn object to be accessed to cause a denial of service.
Remediation
Install update from vendor's website.