CVE-2024-50193

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

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.

7.1

CVSS

Severity: High

CVSS 3.1 •

EPSS 0.03%

Affected: Linux Linux

References

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

Frequently Asked Questions

What is the severity of CVE-2024-50193?: CVE-2024-50193 has been scored as a high severity vulnerability.
How to fix CVE-2024-50193?: To fix CVE-2024-50193, make sure you are using an up-to-date version of the affected component(s) by checking the vendor release notes. As for now, there are no other specific guidelines available.
Is CVE-2024-50193 being actively exploited in the wild?: As for now, there are no information to confirm that CVE-2024-50193 is being actively exploited. According to its EPSS score, there is a ~0% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
What software or system is affected by CVE-2024-50193?: CVE-2024-50193 affects Linux Linux, Linux Linux.

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