CVE-2022-4994

KVM: x86: wean fast IN from emulator_pio_in

State: Published
Severity: Not scored
Published: Jul 30, 2026
Updated: Jul 30, 2026
Reserved: Jul 30, 2026

Description

In the Linux kernel, the following vulnerability has been resolved:

KVM: x86: wean fast IN from emulator_pio_in

Use __emulator_pio_in() directly for fast PIO instead of bouncing through emulator_pio_in() now that __emulator_pio_in() fills "val" when handling in-kernel PIO. vcpu->arch.pio.count is guaranteed to be '0', so this a pure nop.

emulator_pio_in_emulated is now the last caller of emulator_pio_in.

No functional change intended.

Scores

The record has no CVSS score.

Weaknesses

The record names no weakness.

Affected Products

Product	Versions
LinuxLinux	8370c3d08bd98576d97514eca29970e03767a5d1 to before dc7a4bfde507ffe1d8bef49aba1322f1d20c2cb3Affected
LinuxLinux	4.10Affected before 4.10Not affected 6.0 and laterNot affected

References

https://git.kernel.org/stable/c/dc7a4bfde507ffe1d8bef49aba1322f1d20c2cb3

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