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CVE-2024-47727 is an x86 Linux kernel flaw in the Trusted Domain Extensions (TDX) MMIO exception-handling path. TDX permits only kernel-initiated MMIO, and handle_mmio() previously determined whether an MMIO #VE was in-kernel based on exception context without validating that the target address was in kernel space. A userspace process could pass an MMIO address to a syscall whose implementation performs get_user() or put_user(), causing an MMIO #VE that the kernel misclassified as a kernel-initiated MMIO operation. The fix validates that the MMIO target address belongs to kernel space before decoding the instruction.
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5 sources tracked across advisories, community write-ups, and news. New activity surfaces here as Mallory finds it.
A Linux kernel x86 Trusted Domain Extensions (TDX) flaw involving the in-kernel MMIO check.
Linux kernel x86 Trusted Domain Extensions (TDX) flaw involving the in-kernel MMIO check.
Linux kernel x86 TDX in-kernel MMIO validation flaw.
A Linux kernel x86 TDX flaw in the in-kernel MMIO validation logic that could allow userspace to deceive the kernel into performing MMIO operations on its behalf via a syscall targeting an MMIO address.
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Every observed campaign linking this CVE to a named adversary.
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Cross-references every affected SKU, including bundled OEM variants.
Community discussion across Reddit, Mastodon, and other social sources.