KVM: 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.

Scores

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

EPSS (exploitation in 30 days)

0.19% · top 91% of all CVEs (6 Nov 2026)

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 (1)

• https://git.kernel.org/stable/c/dc7a4bfde507ffe1d8bef49aba1322f1d20c2cb3 (opens in a new tab)

Sources

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

• CVE.org record (opens in a new tab)
• CVE List JSON (GitHub) (opens in a new tab)
• NVD (opens in a new tab)
• FIRST EPSS (opens in a new tab)
• OSV.dev (opens in a new tab)
• GitHub Advisories (opens in a new tab)
• CIRCL Vulnerability-Lookup (opens in a new tab)

Badge for a README or a ticket

[![CVE-2022-4994](https://trackcve.app/badge/CVE-2022-4994.svg)](https://trackcve.app/cve/CVE-2022-4994)

Record last updated 30 Jul 2026, 09:18 UTC.