CVE-2022-4994

unknowncovered by 1 sourcefirst seen 2026-07-30

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.

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Exploitation outlook

Low exploitation risk0.18% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 8% of all EPSS-scored CVEs.

Advisory coverage (1)

unknownCVE-2022-4994: In the Linux kernel, the following vulnerability has been resolved: KVM: x86: wean fast IN from…nvd · 2026-07-30

External references

NVD record for CVE-2022-4994

CVE.org record

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