CVE-2020-27153: Bluez

High severity, CVSS 8.6. EPSS: 4.3% chance of exploitation in the next 30 days.

In BlueZ before 5.55, a double free was found in the gatttool disconnect_cb() routine from shared/att.c. A remote attacker could potentially cause a denial of service or code execution, during service discovery, due to a redundant disconnect MGMT event.

Affected products

• Bluez Bluez: before 5.55 (fixed in 5.55)
• Debian Debian Linux: version 9.0 only; version 10.0 only
• Opensuse Leap: version 15.1 only; version 15.2 only

Published 2020-10-15. Last modified 2026-06-17.