It was discovered that there was a double-free vulnerability in BlueZ, a suite of Bluetooth tools, utilities and daemons.
A remote attacker could potentially cause a denial of service or code
execution during service discovery, due to a redundant disconnect management
For Debian 8 Jessie, these problems have been fixed in version 5.43-2+deb9u2~deb8u2.
We recommend that you upgrade your bluez packages.
Further information about Extended LTS security advisories can be found at: https://deb.freexian.com/extended-lts/