cve-2024-47727
Vulnerability from cvelistv5
Published
2024-10-21 12:14
Modified
2024-12-19 09:26
Severity ?
Summary
In the Linux kernel, the following vulnerability has been resolved: x86/tdx: Fix "in-kernel MMIO" check TDX only supports kernel-initiated MMIO operations. The handle_mmio() function checks if the #VE exception occurred in the kernel and rejects the operation if it did not. However, userspace can deceive the kernel into performing MMIO on its behalf. For example, if userspace can point a syscall to an MMIO address, syscall does get_user() or put_user() on it, triggering MMIO #VE. The kernel will treat the #VE as in-kernel MMIO. Ensure that the target MMIO address is within the kernel before decoding instruction.
References
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/18ecd5b74682839e7cdafb7cd1ec106df7baa18cPatch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/25703a3c980e21548774eea8c8a87a75c5c8f58cPatch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/4c0c5dcb5471de5fc8f0a1c4980e5815339e1ceePatch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/bca2e29f7e26ce7c3522f8b324c0bd85612f68e3Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/d4fc4d01471528da8a9797a065982e05090e1d81Patch
Impacted products
Vendor Product Version
Linux Linux Version: 31d58c4e557d46fa7f8557714250fb6f89c941ae
Version: 31d58c4e557d46fa7f8557714250fb6f89c941ae
Version: 31d58c4e557d46fa7f8557714250fb6f89c941ae
Version: 31d58c4e557d46fa7f8557714250fb6f89c941ae
Version: 31d58c4e557d46fa7f8557714250fb6f89c941ae
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   Linux Linux Version: 5.19
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}


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