CVE-2022-4994

UNRATEDCVSS · not yet scored
—
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • No CVSS published and no exploitation signals yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS v2: —Exploit: None knownExposed: 0

No vendor fix yet — apply a workaround or compensating control (WAF / firewall / segmentation) and watch for a patch.

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.

CVSS v3
—
EchelonGraph score
Not yet assessedNo source has published severity data for this CVE yet — no CVSS score from NVD or a CNA, no GitHub advisory, and it is not in CISA KEV. This is not a rating of zero; we cannot assess it yet.
EG Score
—
EG Risk
—
EPSS PROB
0%
EPSS %ILE
4%
KEV
Not listed

Published

July 30, 2026

Last Modified

July 30, 2026

References (1)

Vendor Advisories for CVE-2022-4994(1)

These vendors published their own advisory mentioning this CVE — often with vendor-specific remediation steps + affected product lists not in NVD.

Affected Packages

(4 across 4 ecosystems)
Debian:11(1)
PackageVulnerable rangeFixed inDependents
linux5.10.103-1 ... 7.2~rc5-1~exp1 (496 versions)——
Debian:12(1)
PackageVulnerable rangeFixed inDependents
linux—6.0.2-1—
Debian:13(1)
PackageVulnerable rangeFixed inDependents
linux—6.0.2-1—
Debian:14(1)
PackageVulnerable rangeFixed inDependents
linux—6.0.2-1—

Data Freshness Timeline

(refreshed 7× in last 7d / 39× in last 30d)

Each row is a source pipeline that fetched or updated this CVE on that date, with what changed. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. Most recent first.

  1. 2026-08-30 01:19 UTCEPSS rescore
  2. 2026-08-29 22:38 UTCGHSA enrichment
  3. 2026-08-28 21:38 UTCEPSS rescore
  4. 2026-08-27 14:22 UTCEPSS rescore
  5. 2026-08-26 14:43 UTCEPSS rescore
  6. 2026-08-26 03:52 UTCGHSA enrichment
  7. 2026-08-25 13:46 UTCEPSS rescore
  8. 2026-08-23 04:36 UTCGHSA enrichment
  9. 2026-08-23 00:17 UTCEPSS rescore
  10. 2026-08-21 23:46 UTCEPSS rescore
  11. 2026-08-20 22:53 UTCEPSS rescore
  12. 2026-08-20 05:19 UTCGHSA enrichment
  13. 2026-08-19 17:01 UTCEPSS rescore
  14. 2026-08-18 13:45 UTCEPSS rescore
  15. 2026-08-17 13:44 UTCEPSS rescore
  16. 2026-08-17 06:03 UTCGHSA enrichment
  17. 2026-08-16 14:53 UTCEPSS rescore
  18. 2026-08-16 02:12 UTCEPSS rescore
  19. 2026-08-15 01:27 UTCEPSS rescore
  20. 2026-08-14 06:40 UTCGHSA enrichment
  21. 2026-08-13 21:58 UTCEPSS rescore
  22. 2026-08-12 13:48 UTCEPSS rescore
  23. 2026-08-11 07:23 UTCGHSA enrichment
  24. 2026-08-09 13:44 UTCEPSS rescore
  25. 2026-08-09 13:44 UTCEPSS rescore
Show 18 more
  1. 2026-08-08 16:34 UTCEPSS rescore
  2. 2026-08-08 08:07 UTCGHSA enrichment
  3. 2026-08-07 16:24 UTCEPSS rescore
  4. 2026-08-06 13:44 UTCEPSS rescore
  5. 2026-08-05 19:15 UTCEPSS rescore
  6. 2026-08-05 08:51 UTCGHSA enrichment
  7. 2026-08-04 15:07 UTCEPSS rescore
  8. 2026-08-04 10:35 UTCEPSS rescore
  9. 2026-08-03 10:33 UTCEPSS rescore
  10. 2026-08-02 09:33 UTCEG score recompute
  11. 2026-08-02 09:33 UTCGHSA enrichment
  12. 2026-08-02 02:24 UTCEPSS rescore
  13. 2026-08-01 04:13 UTCEPSS rescore
  14. 2026-08-01 04:13 UTCEPSS rescore
  15. 2026-07-30 16:25 UTCEPSS rescore
  16. 2026-07-30 10:17 UTCNVD update
  17. 2026-07-30 09:56 UTCEG score recompute
  18. 2026-07-30 09:56 UTCMITRE cvelistV5first tracked

Frequently asked(4)

What is CVE-2022-4994?
CVE-2022-4994 is a publicly disclosed vulnerability published on July 30, 2026. In the Linux kernel, the following vulnerability has been resolved: KVM: x86: wean fast IN from emulatorpioin Use emulatorpioin() directly for fast PIO instead of bouncing through emulatorpioin() now that emulatorpioin() fills "val" when handling in-kernel PIO. vcpu->arch.pio.count is guaranteed to…
When was CVE-2022-4994 disclosed?
CVE-2022-4994 was first published in the National Vulnerability Database on July 30, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2022-4994 actively exploited?
CVE-2022-4994 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0% probability of exploitation in the next 30 days, which ranks it in the top 96.4% of all scored CVEs.
How do I remediate CVE-2022-4994?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2022-4994, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

Dependency Blast Radius

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