SB2025100847 - Use-after-free in Linux kernel bluetooth
Published: October 8, 2025 Updated: October 26, 2025
Security Bulletin ID
SB2025100847
Severity
Low
Patch available
YES
Number of vulnerabilities
1
Exploitation vector
Local access
Highest impact
Code execution
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 1 security vulnerability.
1) Use-after-free (CVE-ID: CVE-2023-53673)
The vulnerability allows a local user to escalate privileges on the system.
The vulnerability exists due to a use-after-free error within the hci_cs_disconnect() function in net/bluetooth/hci_event.c. A local user can escalate privileges on the system.
Remediation
Install update from vendor's website.
References
- https://git.kernel.org/stable/c/093a07052406b363b1b2ab489e17dbadaf3e509b
- https://git.kernel.org/stable/c/59bd1e476bbc7bc6dff3c61bba787095a4839796
- https://git.kernel.org/stable/c/7f7cfcb6f0825652973b780f248603e23f16ee90
- https://mirrors.edge.kernel.org/pub/linux/kernel/v6.x/ChangeLog-6.1.42
- https://mirrors.edge.kernel.org/pub/linux/kernel/v6.x/ChangeLog-6.4.7
- https://mirrors.edge.kernel.org/pub/linux/kernel/v6.x/ChangeLog-6.5