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Volodymyr Babchuk

باحث منEPAM
#51784من 60,403
5.5إجمالي CVSS
الثغرات · 1
PT-2024-32116
2024-07-28
5.5
CVE-2024-46689
Linux
Linux Kernel
The issue is related to the mapping of shared memory in the Linux kernel, specifically in the soc: qcom: cmd-db component. The problem arises when the XPU falsely detects clean cache eviction as a "write" into the write-protected region, leading to a secure interrupt and an endless loop in the Trust Zone. This occurs because the Qualcomm Hypervisor maps the region as Non-Cacheable memory in Stage 2 translation tables, but other hypervisors like Xen or KVM do not know about these specific mappings. The patch fixes the issue by updating the mapping of cmd-db memory from MEMREMAP WB to MEMREMAP WT/WC, removing the dependency on correct mappings in Stage 2 tables.