Comment by Namidairo

> Most vendors gave the security researchers either silent treatment or were slow, even after Airoha published fixes. Jabra was one of the positive outlier, Sony unfortunately negatively.

While I don't recall Sony issuing an advisory, I believe the users of their app would have started getting update notifications since they (quietly) released firmware updates.

> This means there is great opportunity for Linux users to control their Bluetooth headsets, which for example is quite nice in an office setting to toggle "hearthrough" when toggling volume "mute" on your machine.

I think most vendors are using custom services with their own UUIDs for settings such as this.

Regardless, I believe there are open client implementations for some of the more popular devices. Gadgetbridge comes to mind in regards to Android, not sure about any Linux equivalent.