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.

Classification

CVE ID: CVE-2024-50193

Affected Products

Vendor: Linux

Product: Linux

Exploit Prediction Scoring System (EPSS)

EPSS Score: 0.03% (probability of being exploited)

EPSS Percentile: 7.03% (scored less or equal to compared to others)

EPSS Date: 2025-06-02 (when was this score calculated)

References

https://nvd.nist.gov/vuln/detail/CVE-2024-50193
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

Timeline