CVE-2018-6913: Canonical Ubuntu Linux

Critical severity, CVSS 9.8. EPSS: 10.7% chance of exploitation in the next 30 days.

Heap-based buffer overflow in the pack function in Perl before 5.26.2 allows context-dependent attackers to execute arbitrary code via a large item count.

Affected products

• Canonical Ubuntu Linux: version 12.04 only; version 14.04 only; version 16.04 only; version 17.10 only
• Debian Debian Linux: version 7.0 only; version 8.0 only; version 9.0 only
• Perl Perl: before 5.26.2 (fixed in 5.26.2)

Published 2018-04-17. Last modified 2026-06-17.