CVE-2021-39926: Debian Linux

High severity, CVSS 7.5. EPSS: 7.8% chance of exploitation in the next 30 days.

Buffer overflow in the Bluetooth HCI_ISO dissector in Wireshark 3.4.0 to 3.4.9 allows denial of service via packet injection or crafted capture file

Affected products

• Debian Debian Linux: version 10.0 only; version 11.0 only
• Fedoraproject Fedora: version 34 only; version 35 only
• Wireshark Wireshark: from 3.4.0, up to and including 3.4.9

Published 2021-11-19. Last modified 2026-06-17.