MEDIUM
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.
http://lists.opensuse.org/opensuse-security-announce/2019-07/msg00025.html
http://www.openwall.com/lists/oss-security/2019/06/24/5
http://www.securityfocus.com/bid/108884
https://access.redhat.com/errata/RHSA-2019:2703
https://cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.1.15
https://seclists.org/bugtraq/2019/Aug/13
https://support.f5.com/csp/article/K12876166
https://support.f5.com/csp/article/K12876166?utm_source=f5support&utm_medium=RSS
Source: MITRE
Published: 2019-06-25
Updated: 2019-06-28
Type: CWE-119
Base Score: 6.9
Vector: AV:L/AC:M/Au:N/C:C/I:C/A:C
Impact Score: 10
Exploitability Score: 3.4
Severity: MEDIUM
Base Score: 7
Vector: CVSS:3.0/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H
Impact Score: 5.9
Exploitability Score: 1
Severity: HIGH