CVE-2018-17456: Canonical Ubuntu Linux

Critical severity, CVSS 9.8. EPSS: 97.4% chance of exploitation in the next 30 days.

Git before 2.14.5, 2.15.x before 2.15.3, 2.16.x before 2.16.5, 2.17.x before 2.17.2, 2.18.x before 2.18.1, and 2.19.x before 2.19.1 allows remote code execution during processing of a recursive "git clone" of a superproject if a .gitmodules file has a URL field beginning with a '-' character.

Affected products

• Canonical Ubuntu Linux: version 14.04 only; version 16.04 only; version 18.04 only
• Debian Debian Linux: version 9.0 only
• Git-Scm Git: from 2.14.0, before 2.14.5 (fixed in 2.14.5); from 2.15.0, before 2.15.3 (fixed in 2.15.3); from 2.16.0, before 2.16.5 (fixed in 2.16.5); from 2.17.0, before 2.17.2 (fixed in 2.17.2); from 2.18.0, before 2.18.1 (fixed in 2.18.1); from 2.19.0, before 2.19.1 (fixed in 2.19.1)
• Red Hat Ansible Tower: version 3.3 only
• Red Hat Enterprise Linux: version 6.0 only; version 6.7 only; version 7.0 only; version 7.3 only; version 7.4 only; version 7.5 only; …
• Red Hat Enterprise Linux Desktop: version 7.0 only
• Red Hat Enterprise Linux Server: version 7.0 only
• Red Hat Enterprise Linux Server Aus: version 7.6 only
• Red Hat Enterprise Linux Server Eus: version 7.6 only
• Red Hat Enterprise Linux Server Tus: version 7.6 only
• Red Hat Enterprise Linux Workstation: version 7.0 only

Published 2018-10-06. Last modified 2026-06-17.