arch/powerpc/mm/mmucontextbook3s64.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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{
"target": {
"function": "hash__init_new_context",
"file": "arch/powerpc/mm/mmu_context_book3s64.c"
},
"id": "CVE-2019-12817-01b339f9",
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},
{
"target": {
"file": "arch/powerpc/mm/mmu_context_book3s64.c"
},
"id": "CVE-2019-12817-1c4f0a3a",
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"https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2019-12817.json"