SB20240603106 - Improper locking in Linux kernel bluetooth
Published: June 3, 2024 Updated: May 14, 2025
Security Bulletin ID
SB20240603106
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 security vulnerability.
1) Improper locking (CVE-ID: CVE-2021-47038)
The vulnerability allows a local user to perform a denial of service (DoS) attack.
The vulnerability exists due to improper locking within the hci_conn_get_phy() function in net/bluetooth/hci_conn.c. A local user can perform a denial of service (DoS) attack.
Remediation
Install update from vendor's website.
References
- https://git.kernel.org/stable/c/7cc0ba67883c6c8d3bddb283f56c167fc837a555
- https://git.kernel.org/stable/c/fee71f480bc1dec5f6ae3b0b185ff12a62bceabc
- https://git.kernel.org/stable/c/332e69eb3bd90370f2d9f2c2ca7974ff523dea17
- https://git.kernel.org/stable/c/17486960d79b900c45e0bb8fbcac0262848582ba
- https://mirrors.edge.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.10.37
- https://mirrors.edge.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.11.21
- https://mirrors.edge.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.12.4
- https://mirrors.edge.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.13