CVE-2024-50193

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

State: Published
Severity: 7.1 High
Published: Nov 8, 2024
Updated: May 23, 2026
Reserved: Oct 21, 2024

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.

Scores

CVSS	Score	Vector	Source
3.1	7.1 High	CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H	CISA-ADP

Weaknesses

The record names no weakness.

Affected Products

Product	Versions
LinuxLinux	50f021f0b985629accf10481a6e89af8b9700583 to before 6f44a5fc15b5cece0785bc07453db77d99b0a6deAffected d54de9f2a127090f2017184e8257795b487d5312 to before b6400eb0b347821efc57760221f8fb6d63b9548aAffected 2e3087505ddb8ba2d3d4c81306cca11e868fcdb9 to before 43778de19d2ef129636815274644b9c16e78c66bAffected ca13d8cd8dac25558da4ee8df4dc70e8e7f9d762 to before 227358e89703c344008119be7e8ffa3fdb5b92deAffected a0e2dab44d22b913b4c228c8b52b2a104434b0b3 to before 64adf22c4bc73ede920baca5defefb70f190cdbcAffected a0e2dab44d22b913b4c228c8b52b2a104434b0b3 to before 48a2440d0f20c826b884e04377ccc1e4696c84e9Affected 51eca9f1fd047b500137d021f882d93f03280118Affected 5.10.215 to before 5.10.228Affected 5.15.154 to before 5.15.169Affected 6.1.81 to before 6.1.114Affected 6.6.21 to before 6.6.58Affected 6.7.9 to before 6.8Affected
LinuxLinux	6.8Affected before 6.8Not affected 5.10.228 through 5.10.Not affected 5.15.169 through 5.15.Not affected 6.1.114 through 6.1.Not affected 6.6.58 through 6.6.Not affected 6.11.5 through 6.11.*Not affected 6.12 and laterNot affected

Product

Versions

LinuxLinux

50f021f0b985629accf10481a6e89af8b9700583 to before 6f44a5fc15b5cece0785bc07453db77d99b0a6deAffected
d54de9f2a127090f2017184e8257795b487d5312 to before b6400eb0b347821efc57760221f8fb6d63b9548aAffected
2e3087505ddb8ba2d3d4c81306cca11e868fcdb9 to before 43778de19d2ef129636815274644b9c16e78c66bAffected
ca13d8cd8dac25558da4ee8df4dc70e8e7f9d762 to before 227358e89703c344008119be7e8ffa3fdb5b92deAffected
a0e2dab44d22b913b4c228c8b52b2a104434b0b3 to before 64adf22c4bc73ede920baca5defefb70f190cdbcAffected
a0e2dab44d22b913b4c228c8b52b2a104434b0b3 to before 48a2440d0f20c826b884e04377ccc1e4696c84e9Affected
51eca9f1fd047b500137d021f882d93f03280118Affected
5.10.215 to before 5.10.228Affected
5.15.154 to before 5.15.169Affected
6.1.81 to before 6.1.114Affected
6.6.21 to before 6.6.58Affected
6.7.9 to before 6.8Affected

LinuxLinux

6.8Affected
before 6.8Not affected
5.10.228 through 5.10.*Not affected
5.15.169 through 5.15.*Not affected
6.1.114 through 6.1.*Not affected
6.6.58 through 6.6.*Not affected
6.11.5 through 6.11.*Not affected
6.12 and laterNot affected

References

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