CVE-2018-14617: Canonical Ubuntu Linux

Medium severity, CVSS 5.5. EPSS: 2.5% chance of exploitation in the next 30 days.

An issue was discovered in the Linux kernel through 4.17.10. There is a NULL pointer dereference and panic in hfsplus_lookup() in fs/hfsplus/dir.c when opening a file (that is purportedly a hard link) in an hfs+ filesystem that has malformed catalog data, and is mounted read-only without a metadata directory.

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.