CVE-2018-10877: Canonical Ubuntu Linux

Medium severity, CVSS 6.5. EPSS: 2.2% chance of exploitation in the next 30 days.

Linux kernel ext4 filesystem is vulnerable to an out-of-bound access in the ext4_ext_drop_refs() function when operating on a crafted ext4 filesystem image.

Affected products

• Canonical Ubuntu Linux: version 14.04 only; version 16.04 only; version 18.04 only
• Debian Debian Linux: version 8.0 only
• Linux Linux Kernel: version 4.16 only; version 4.17 only
• Red Hat Enterprise Linux: version 7.0 only

Published 2018-07-18. Last modified 2026-06-17.