SB2025121066 - Use-after-free in Linux kernel bluetooth
Published: December 10, 2025 Updated: December 12, 2025
Security Bulletin ID
SB2025121066
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-2023-53827)
The vulnerability allows a local user to escalate privileges on the system.
The vulnerability exists due to a use-after-free error within the l2cap_disconnect_req() and l2cap_disconnect_rsp() functions in net/bluetooth/l2cap_core.c. A local user can escalate privileges on the system.
Remediation
Install update from vendor's website.
References
- https://git.kernel.org/stable/c/1351551aa9058e07a20a27a158270cf84fcde621
- https://git.kernel.org/stable/c/348d446762e7c70778df8bafbdf3fa0df2123f58
- https://git.kernel.org/stable/c/a2a9339e1c9deb7e1e079e12e27a0265aea8421a
- https://git.kernel.org/stable/c/ac6725a634f7e8c0330610a8527f20c730b61115
- https://git.kernel.org/stable/c/c02421992505c95c7f3c9ad59ee35e22eac60988
- https://git.kernel.org/stable/c/d82a439c3cfdb28aa7e82e2e849c5c4dd9fca284
- https://git.kernel.org/stable/c/d9ba36c22a7bb09d6bac4cc2f243eff05da53f43
- https://git.kernel.org/stable/c/f2d38e77aa5f3effc143e7dd24da8acf02925958
- https://mirrors.edge.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.14.313