CVE-2018-7755: Canonical Ubuntu Linux

Medium severity, CVSS 5.5. EPSS: 0.7% chance of exploitation in the next 30 days.

An issue was discovered in the fd_locked_ioctl function in drivers/block/floppy.c in the Linux kernel through 4.15.7. The floppy driver will copy a kernel pointer to user memory in response to the FDGETPRM ioctl. An attacker can send the FDGETPRM ioctl and use the obtained kernel pointer to discover the location of kernel code and data and bypass kernel security protections such as KASLR.

Affected products

• Canonical Ubuntu Linux: version 12.04 only; version 14.04 only; version 16.04 only; version 17.10 only; version 18.04 only
• Linux Linux Kernel: up to and including 4.15.7

Published 2018-03-08. Last modified 2026-06-17.