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CVE-2019-19338 is an incomplete Linux kernel KVM mitigation for Intel TSX Asynchronous Abort (TAA, CVE-2019-11135). On TAA-vulnerable but MDS-unaffected Intel Cascade Lake hosts, KVM could expose MDS_NO=1 to a guest while TSX remained enabled. The guest consequently skipped the VERW-based clearing of affected microarchitectural buffers, despite still requiring that clearing for TAA mitigation. The corrected handling exports the necessary TSX control information to guests; an alternative mitigation is to expose MDS_NO=0 to guests when TSX is enabled.
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A Linux kernel KVM vulnerability involving incomplete handling of the MSR_IA32_TSX_CTRL control for guests, representing an incomplete fix for TSX Asynchronous Abort (TAA).
A Linux kernel KVM issue in which exporting MSR_IA32_TSX_CTRL to guests was an incomplete fix for TSX Asynchronous Abort (TAA).
Incomplete Linux kernel KVM fix concerning export of MSR_IA32_TSX_CTRL to guests and the TAA issue.
An incomplete Linux KVM fix related to exporting MSR_IA32_TSX_CTRL to guests for Transactional Asynchronous Abort (TAA) mitigation.
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Cross-references every affected SKU, including bundled OEM variants.
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