CVE-2018-14609: Canonical Ubuntu Linux

Medium severity, CVSS 5.5. EPSS: 2.7% chance of exploitation in the next 30 days.

An issue was discovered in the Linux kernel through 4.17.10. There is an invalid pointer dereference in __del_reloc_root() in fs/btrfs/relocation.c when mounting a crafted btrfs image, related to removing reloc rb_trees when reloc control has not been initialized.

Affected products

• Canonical Ubuntu Linux: version 14.04 only; version 16.04 only
• Debian Debian Linux: version 8.0 only; version 9.0 only
• Linux Linux Kernel: up to and including 4.17.10

Published 2018-07-27. Last modified 2026-06-17.