Unrestricted Virtual Memory Access in PowerPC Linux Kernel

Unrestricted Virtual Memory Access in PowerPC Linux Kernel

CVE-2019-12817 · HIGH Severity

CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H

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.

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