CVE-2019-12817: Canonical Ubuntu Linux

High severity, CVSS 7.0. EPSS: 0.4% chance of exploitation in the next 30 days.

arch/powerpc/mm/mmu_context_book3s64.c in the Linux kernel before 5.1.15 for powerpc has a bug where unrelated processes may be able to read/write to one another's virtual memory under certain conditions via an mmap above 512 TB. Only a subset of powerpc systems are affected.

Affected products

• Canonical Ubuntu Linux: version 18.04 only; version 18.10 only; version 19.04 only
• Debian Debian Linux: version 9.0 only; version 10.0 only
• Fedoraproject Fedora: version 29 only; version 30 only
• Linux Linux Kernel: before 5.1.15 (fixed in 5.1.15)
• Opensuse Leap: version 15.1 only
• Red Hat Enterprise Linux: version 8.0 only
• Red Hat Enterprise Linux Eus: version 8.1 only; version 8.2 only; version 8.4 only
• Red Hat Enterprise Linux Server Aus: version 8.2 only; version 8.4 only
• Red Hat Enterprise Linux Server Tus: version 8.2 only; version 8.4 only

Published 2019-06-25. Last modified 2026-06-17.