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CVE-2021-47450 Detail
Awaiting Analysis
This vulnerability is currently awaiting analysis. DescriptionIn the Linux kernel, the following vulnerability has been resolved: KVM: arm64: Fix host stage-2 PGD refcount The KVM page-table library refcounts the pages of concatenated stage-2 PGDs individually. However, when running KVM in protected mode, the host's stage-2 PGD is currently managed by EL2 as a single high-order compound page, which can cause the refcount of the tail pages to reach 0 when they shouldn't, hence corrupting the page-table. Fix this by introducing a new hyp_split_page() helper in the EL2 page allocator (matching the kernel's split_page() function), and make use of it from host_s2_zalloc_pages_exact(). Severity
CVSS 4.0 Severity and Metrics:
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Weakness Enumeration
Quick InfoCVE Dictionary Entry:CVE-2021-47450 NVD Published Date: 05/22/2024 NVD Last Modified: 05/22/2024 Source: kernel.org |
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