CVE-2019-17055: Canonical Ubuntu Linux

Low severity, CVSS 3.3. EPSS: 0.5% chance of exploitation in the next 30 days.

base_sock_create in drivers/isdn/mISDN/socket.c in the AF_ISDN network module in the Linux kernel through 5.3.2 does not enforce CAP_NET_RAW, which means that unprivileged users can create a raw socket, aka CID-b91ee4aa2a21.

Affected products

• Canonical Ubuntu Linux: version 14.04 only; version 16.04 only; version 18.04 only; version 19.04 only
• Debian Debian Linux: version 8.0 only
• Fedoraproject Fedora: version 29 only
• Linux Linux Kernel: up to and including 5.3.2
• Opensuse Leap: version 15.0 only; version 15.1 only
• Red Hat Enterprise Linux Desktop: version 6.0 only
• Red Hat Enterprise Linux Server: version 6.0 only
• Red Hat Enterprise Linux Workstation: version 6.0 only

Published 2019-10-01. Last modified 2026-06-17.