CVE-2024-50193 Information

Description

In the Linux kernel the following vulnerability has been resolved:

x86/entry_32: Clear CPU buffers after register restore in NMI return

CPU buffers are currently cleared after call to exc_nmi but before register state is restored. This may be okay for MDS mitigation but not for RDFS. Because RDFS mitigation requires CPU buffers to be cleared when registers don’t have any sensitive data.

Move CLEAR_CPU_BUFFERS after RESTORE_ALL_NMI.

Reference

https://git.kernel.org/stable/c/6f44a5fc15b5cece0785bc07453db77d99b0a6de https://git.kernel.org/stable/c/b6400eb0b347821efc57760221f8fb6d63b9548a https://git.kernel.org/stable/c/43778de19d2ef129636815274644b9c16e78c66b https://git.kernel.org/stable/c/227358e89703c344008119be7e8ffa3fdb5b92de https://git.kernel.org/stable/c/64adf22c4bc73ede920baca5defefb70f190cdbc https://git.kernel.org/stable/c/48a2440d0f20c826b884e04377ccc1e4696c84e9