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CVE-2022-4994KVM: x86: wean fast IN from emulator_pio_in

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.

Timeline

  1. ID reserved

    By Linux

  2. Published

Changes after publication (a new score, a public exploit, EPSS crossing 1, 10 or 50 %, leaving KEV) are kept since November 2026; earlier ones are not known.

Scores

No CVSS score yet: neither the CNA, CISA nor NVD has scored this CVE. NVD status: Undergoing Analysis.

EPSS (exploitation in 30 days)
0.19% · top 91% of all CVEs (13 Nov 2026)
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The list uses the assigner's score when there is one, then CISA's, then NVD's: Not scored.

Affected products

  • Linux · Linux

    • affected 8370c3d08bd98576d97514eca29970e03767a5d1 – < dc7a4bfde507ffe1d8bef49aba1322f1d20c2cb3

  • Linux · Linux

    • affected 4.10
    • unaffected < 4.10
    • unaffected 6.0 – ≤ *

References

References1

Sources

The same CVE in the primary databases and aggregators, to check against.

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Record last updated .