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CVE-2022-4994

KVM: x86: wean fast IN from emulator_pio_in

N/A
Published: July 30, 2026 at 09:18 AM UTC
Updated: July 30, 2026 at 10:32 AM UTC
1 product affected across 1 vendorLinux Kernel

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Severity
N/A
Exploit prediction
EPSS 0.2%

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.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

Linux Kernel· Linux
95%
4.10 ≤ v < 6.04.108370c3d08bd98576d97514eca29970e03767a5d1
Vendor states this is fixed in dc7a4bfde507ffe1d8bef49aba1322f1d20c2cb3 (fixed)
Vendor states this is fixed in 4.10 (unaffected)
Vendor states this is fixed in 6.0 (unaffected)

Remediation

No guide yet

No remediation guidance has been written for this CVE yet, and no fixed version or vendor advisory is recorded against it.

References (1)

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

Quick Info

StatusRECEIVED

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