KVM: x86: wean fast IN from emulator_pio_in
Published Jul 30, 2026
5.5
MEDIUMCVSS 3.1
EPSS 0.19%
Description
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
-
Affected
- ≥ , <
-
Affected
- 4.10
Unaffected
- ≥ 0, < 4.10
- 6.0
No data.
No data.
Red Hat Enterprise Linux 10
kernel
Not affected
Red Hat Enterprise Linux 6
kernel
Out of support scope
Red Hat Enterprise Linux 7
kernel
Not affected
Red Hat Enterprise Linux 7
kernel-rt
Not affected
Red Hat Enterprise Linux 8
kernel
Fix deferred
Red Hat Enterprise Linux 8
kernel-rt
Fix deferred
Red Hat Enterprise Linux 9
kernel
Fix deferred
Red Hat Enterprise Linux 9
kernel-rt
Fix deferred
| Product | Package | State | Advisory |
|---|---|---|---|
| Red Hat Enterprise Linux 10 | kernel | Not affected | n/a |
| Red Hat Enterprise Linux 6 | kernel | Out of support scope | n/a |
| Red Hat Enterprise Linux 7 | kernel | Not affected | n/a |
| Red Hat Enterprise Linux 7 | kernel-rt | Not affected | n/a |
| Red Hat Enterprise Linux 8 | kernel | Fix deferred | n/a |
| Red Hat Enterprise Linux 8 | kernel-rt | Fix deferred | n/a |
| Red Hat Enterprise Linux 9 | kernel | Fix deferred | n/a |
| Red Hat Enterprise Linux 9 | kernel-rt | Fix deferred | n/a |
No package ranges for this CVE.
Remediation
No remediation recorded yet.
References (7)
- https://access.redhat.com/security/cve/CVE-2022-4994 Vendor Advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=2509225 Issue Tracking
- https://euvd.enisa.europa.eu/vulnerability/EUVD-2022-56012 Advisory
- https://git.kernel.org/stable/c/dc7a4bfde507ffe1d8bef49aba1322f1d20c2cb3
- https://lore.kernel.org/linux-cve-announce/2026073058-CVE-2022-4994-07fd@gregkh/T
- https://nvd.nist.gov/vuln/detail/CVE-2022-4994
- https://www.cve.org/CVERecord?id=CVE-2022-4994
Change history (0)
No recorded changes yet.
CVE.org / MITRE
CISA Vulnrichment
No data
GitHub
No data