CVE-2025-38099 Bluetooth: Disable SCO support if READ_VOICE_SETTING is unsupported/broken
A Linux kernel Bluetooth flaw allows attackers to cause a controller lockup and denial of service by establishing a SCO connection with invalid voice settings.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Local or same network only
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2025-38099?
CVE-2025-38099 is a medium-severity denial of service vulnerability in Linux kernel, published on 3 Jul 2025. It can only be exploited from the same machine or local network, with no action from the victim.
Official description
In the Linux kernel, the following vulnerability has been resolved:
Bluetooth: Disable SCO support if READ_VOICE_SETTING is unsupported/broken
A SCO connection without the proper voice_setting can cause the controller to lock up.
Which versions are affected by CVE-2025-38099?
It affects 1 product.
Products include Linux kernel.
How do I fix CVE-2025-38099?
Apply the vendor's patch.
Upgrade, then put limits on request size, rate and nesting depth so one client cannot exhaust the service. More about Denial of service.
Is CVE-2025-38099 being exploited?
There is no known exploitation of CVE-2025-38099 in the wild and no public exploit code.
Other vulnerabilities in Linux kernel
Sources
Also known as BELL-CVE-2025-38099, DEBIAN-CVE-2025-38099, GHSA-vhpc-7gpg-vmp3, ROOT-OS-DEBIAN-11-CVE-2025-38099, ROOT-OS-DEBIAN-12-CVE-2025-38099, ROOT-OS-UBUNTU-2204-CVE-2025-38099 and 2 more.