What’s Vulnerable › Vulnerabilities
CVE-2022-4994: KVM: x86: wean fast IN from emulator_pio_in
- Severity: unknown
- Exploited in the wild: not listed in CISA KEV
- EPSS: 0.2% probability of exploitation in the next 30 days
- Public exploit or detection template: none known
- Published: 2026-07-30 · updated 2026-07-30
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 products
- Linux kernel: 4.10 — fixed in 6.0
How to fix
Upgrade to a fixed version: Linux kernel 6.0. Check the vendor advisory for mitigations.
References
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