SB20260529189 - Use-after-free in Linux kernel bluetooth
Published: May 29, 2026
Security Bulletin ID
SB20260529189
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-2026-46111)
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 attacker to cause a denial of service.
The vulnerability exists due to use-after-free in create_big_sync/create_big_complete in the Bluetooth hci_conn handling code when processing BIG creation completion after an asynchronous operation on a stale connection. A local attacker can trigger BIG creation and cause the kernel to dereference a freed connection pointer to cause a denial of service.
Remediation
Install update from vendor's website.
References
- https://git.kernel.org/stable/c/0beddb0c380bed5f5b8e61ddbe14635bb73d0b41
- https://git.kernel.org/stable/c/1750a2df0eab61dc421a7afae74abdd239a44b85
- https://git.kernel.org/stable/c/6823f730bf195fc296d9edd09e2ca94bc1ff5584
- https://git.kernel.org/stable/c/dc34f8d8240f25dd137dc2758ebbcc75e3779142
- https://git.kernel.org/stable/c/f8eaf92c57ad99358dd372580d5ff87623343a72