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: 0.2%CVSS v2: —Exploit: None knownExposed services: Not assessed

A fix is available — apply it.

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
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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
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EG Risk
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EPSS PROB
0.2%
EPSS %ILE
8th
KEV
Not listed

What the EG score is made of (scorer v4.0: the three questions the 0–10 score mixes, published apart · methodology)

EG Severity
Not assessed: no CVSS publishedA missing CVSS is not a severity of zero.
EG Likelihood
0.2% within 30 daysSource: FIRST EPSS (model v2026.06.15, score date 2026-10-17). FIRST's exploitation probability, not an EchelonGraph model.
Confirmed exploitation
None on record (CISA KEV, EG-KEV Tier 1)Reported apart from the likelihood: an observed fact, not a probability.
EG Priority
No SSVC decision: EchelonGraph has not assessed this CVECISA BOD 26-04: 14 days if the affected system is publicly exposed; Fix on system upgrade if it is not.Each input and its source: the BOD 26-04 block below.

BOD 26-04 (CISA's remediation timeline, Table 1)14 days if the affected system is publicly exposed; Fix on system upgrade if it is not.

In CISA KEV no (CISA's KEV catalog) · Automatable no (CISA's BOD 26-04 default) · Technical impact total (CISA's BOD 26-04 default). Where an input reads “CISA's BOD 26-04 default”, no one has published it for this CVE, and CISA's implementation guidance says: “If “Automatable” and “Technical Impact” information items about a CVE ID are not available and the CVE ID is not in the KEV Catalog, CISA will treat its values as “no” and “total,” respectively, until CISA or a third party provides metadata about the CVE ID. CISA will always provide the Vulnrichment data for a CVE ID listed in the KEV Catalog.” Whether your system is publicly exposed is yours to answer. BOD 26-04 binds US Federal Civilian Executive Branch agencies; for anyone else it is CISA's published timeline, a reference rather than an obligation. The directive · how EchelonGraph applies it

Published

July 30, 2026

Last Modified

July 30, 2026

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 rangeFix by version rangeDependents
linux5.10.103-1 ... 7.2~rc5-1~exp1 (496 versions)
  • every version on: no fix on record
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Debian:12(1)
PackageVulnerable rangeFix by version rangeDependents
linux—
  • every version up to 6.0.2-1: fixed in 6.0.2-1
—
Debian:13(1)
PackageVulnerable rangeFix by version rangeDependents
linux—
  • every version up to 6.0.2-1: fixed in 6.0.2-1
—
Debian:14(1)
PackageVulnerable rangeFix by version rangeDependents
linux—
  • every version up to 6.0.2-1: fixed in 6.0.2-1
—

Data Freshness Timeline

(refreshed 8× in last 7d / 33× in last 30d)

Each row is a time one of our pipelines fetched, updated or re-scored this CVE. 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. An arrow marks a change the record states ("CVSS v3 → 9.1"); EPSS and GHSA rows show the values recorded at that time, not what changed (EPSS values are rounded; hover one for the exact figures). Most recent first.

A repeat, a row identical to one the same pipeline wrote less than 10 seconds earlier, is not a separate refresh and is not counted. 2 repeat rows among the latest 97 are merged into the row they repeat.

  1. 2026-10-19 16:28 UTCEPSS rescoreEPSS 0.2% · 8th percentile
  2. 2026-10-18 16:29 UTCEPSS rescoreEPSS 0.2% · 8th percentile
  3. 2026-10-18 08:19 UTCEG score recompute
  4. 2026-10-17 16:29 UTCEPSS rescoreEPSS 0.2% · 8th percentile
  5. 2026-10-16 16:35 UTCEPSS rescoreEPSS 0.2% · 8th percentile
  6. 2026-10-15 16:28 UTCEPSS rescoreEPSS 0.2% · 8th percentile
  7. 2026-10-14 16:29 UTCEPSS rescoreEPSS 0.2% · 8th percentile
  8. 2026-10-13 16:29 UTCEPSS rescoreEPSS 0.2% · 8th percentile
  9. 2026-10-12 18:41 UTCEG score recompute
  10. 2026-10-12 16:30 UTCEPSS rescoreEPSS 0.2% · 7th percentile
  11. 2026-10-11 22:04 UTCEG score recompute
  12. 2026-10-11 13:45 UTCEPSS rescoreEPSS 0.2% · 7th percentile
  13. 2026-10-10 19:57 UTCEPSS rescoreEPSS 0.2% · 7th percentile
  14. 2026-10-09 20:05 UTCEPSS rescoreEPSS 0.2% · 7th percentile
  15. 2026-10-08 17:05 UTCEPSS rescoreEPSS 0.2% · 7th percentile
  16. 2026-10-07 23:45 UTCEPSS rescoreEPSS 0.2% · 7th percentile
  17. 2026-10-07 06:11 UTCGHSA enrichmentGHSA-p8vm-xf6w-g5jx
  18. 2026-10-06 15:14 UTCEPSS rescoreEPSS 0.2% · 7th percentile
  19. 2026-10-05 17:40 UTCEPSS rescoreEPSS 0.2% · 7th percentile
  20. 2026-10-04 23:19 UTCEPSS rescoreEPSS 0.2% · 7th percentile
  21. 2026-10-04 06:41 UTCGHSA enrichmentGHSA-p8vm-xf6w-g5jx
  22. 2026-10-03 14:23 UTCEPSS rescoreEPSS 0.2% · 7th percentile
  23. 2026-10-01 03:10 UTCGHSA enrichmentGHSA-p8vm-xf6w-g5jx
  24. 2026-09-30 16:12 UTCEG score recompute
  25. 2026-09-30 15:01 UTCEPSS rescoreEPSS 0.2% · 7th percentile
Show 70 more
  1. 2026-09-27 19:04 UTCGHSA enrichmentGHSA-p8vm-xf6w-g5jx
  2. 2026-09-27 13:42 UTCEPSS rescoreEPSS 0.2% · 7th percentile
  3. 2026-09-26 15:55 UTCEPSS rescoreEPSS 0.2% · 7th percentile
  4. 2026-09-26 00:22 UTCEPSS rescoreEPSS 0.2% · 7th percentile
  5. 2026-09-24 14:00 UTCEPSS rescoreEPSS 0.2% · 7th percentile
  6. 2026-09-23 13:45 UTCEPSS rescoreEPSS 0.1% · 3rd percentile
  7. 2026-09-23 02:58 UTCGHSA enrichmentGHSA-p8vm-xf6w-g5jx
  8. 2026-09-20 20:13 UTCEPSS rescoreEPSS 0.1% · 3rd percentile
  9. 2026-09-20 03:41 UTCGHSA enrichmentGHSA-p8vm-xf6w-g5jx
  10. 2026-09-17 03:55 UTCGHSA enrichmentGHSA-p8vm-xf6w-g5jx
  11. 2026-09-16 14:05 UTCEPSS rescoreEPSS 0.1% · 3rd percentile
  12. 2026-09-16 05:11 UTCEPSS rescoreEPSS 0.1% · 3rd percentile
  13. 2026-09-15 03:07 UTCEPSS rescoreEPSS 0.1% · 3rd percentile
  14. 2026-09-14 04:14 UTCGHSA enrichmentGHSA-p8vm-xf6w-g5jx
  15. 2026-09-13 16:44 UTCEPSS rescoreEPSS 0.1% · 3rd percentile
  16. 2026-09-11 14:50 UTCEPSS rescoreEPSS 0.1% · 3rd percentile
  17. 2026-09-11 09:34 UTCEPSS rescoreEPSS 0.1% · 3rd percentile
  18. 2026-09-11 04:58 UTCGHSA enrichmentGHSA-p8vm-xf6w-g5jx
  19. 2026-09-08 21:57 UTCEPSS rescoreEPSS 0.1% · 3rd percentile
  20. 2026-09-08 04:45 UTCGHSA enrichmentGHSA-p8vm-xf6w-g5jx
  21. 2026-09-07 15:59 UTCEPSS rescoreEPSS 0.1% · 3rd percentile
  22. 2026-09-06 13:45 UTCEPSS rescoreEPSS 0.1% · 3rd percentile
  23. 2026-09-05 15:25 UTCEPSS rescoreEPSS 0.1% · 3rd percentile
  24. 2026-09-05 04:55 UTCGHSA enrichmentGHSA-p8vm-xf6w-g5jx
  25. 2026-09-04 13:57 UTCEPSS rescoreEPSS 0.1% · 3rd percentile
  26. 2026-09-04 05:04 UTCEPSS rescoreEPSS 0.1% · 3rd percentile
  27. 2026-09-01 22:39 UTCGHSA enrichmentGHSA-p8vm-xf6w-g5jx
  28. 2026-09-01 13:51 UTCEPSS rescoreEPSS 0.1% · 3rd percentile
  29. 2026-08-30 19:15 UTCEPSS rescoreEPSS 0.1% · 3rd percentile
  30. 2026-08-30 01:19 UTCEPSS rescoreEPSS 0.1% · 3rd percentile
  31. 2026-08-29 22:38 UTCGHSA enrichmentGHSA-p8vm-xf6w-g5jx
  32. 2026-08-28 21:38 UTCEPSS rescoreEPSS 0.1% · 3rd percentile
  33. 2026-08-27 14:22 UTCEPSS rescoreEPSS 0.1% · 3rd percentile
  34. 2026-08-26 14:43 UTCEPSS rescoreEPSS 0.1% · 3rd percentile
  35. 2026-08-26 03:52 UTCGHSA enrichmentGHSA-p8vm-xf6w-g5jx
  36. 2026-08-25 13:46 UTCEPSS rescoreEPSS 0.1% · 3rd percentile
  37. 2026-08-23 04:36 UTCGHSA enrichmentGHSA-p8vm-xf6w-g5jx
  38. 2026-08-23 00:17 UTCEPSS rescoreEPSS 0.2% · 8th percentile
  39. 2026-08-21 23:46 UTCEPSS rescoreEPSS 0.2% · 8th percentile
  40. 2026-08-20 22:53 UTCEPSS rescoreEPSS 0.2% · 8th percentile
  41. 2026-08-20 05:19 UTCGHSA enrichmentGHSA-p8vm-xf6w-g5jx
  42. 2026-08-19 17:01 UTCEPSS rescoreEPSS 0.2% · 8th percentile
  43. 2026-08-18 13:45 UTCEPSS rescoreEPSS 0.2% · 8th percentile
  44. 2026-08-17 13:44 UTCEPSS rescoreEPSS 0.2% · 8th percentile
  45. 2026-08-17 06:03 UTCGHSA enrichmentGHSA-p8vm-xf6w-g5jx
  46. 2026-08-16 14:53 UTCEPSS rescoreEPSS 0.2% · 8th percentile
  47. 2026-08-16 02:12 UTCEPSS rescoreEPSS 0.2% · 8th percentile
  48. 2026-08-15 01:27 UTCEPSS rescoreEPSS 0.2% · 8th percentile
  49. 2026-08-14 06:40 UTCGHSA enrichmentGHSA-p8vm-xf6w-g5jx
  50. 2026-08-13 21:58 UTCEPSS rescoreEPSS 0.2% · 8th percentile
  51. 2026-08-12 13:48 UTCEPSS rescoreEPSS 0.2% · 8th percentile
  52. 2026-08-11 07:23 UTCGHSA enrichmentGHSA-p8vm-xf6w-g5jx
  53. 2026-08-09 13:44 UTCEPSS rescoreEPSS 0.2% · 7th percentile
  54. 2026-08-08 16:34 UTCEPSS rescoreEPSS 0.2% · 7th percentile
  55. 2026-08-08 08:07 UTCGHSA enrichmentGHSA-p8vm-xf6w-g5jx
  56. 2026-08-07 16:24 UTCEPSS rescoreEPSS 0.2% · 7th percentile
  57. 2026-08-06 13:44 UTCEPSS rescoreEPSS 0.2% · 7th percentile
  58. 2026-08-05 19:15 UTCEPSS rescoreEPSS 0.2% · 7th percentile
  59. 2026-08-05 08:51 UTCGHSA enrichmentGHSA-p8vm-xf6w-g5jx
  60. 2026-08-04 15:07 UTCEPSS rescoreEPSS 0.2% · 8th percentile
  61. 2026-08-04 10:35 UTCEPSS rescoreEPSS 0.2% · 8th percentile
  62. 2026-08-03 10:33 UTCEPSS rescoreEPSS 0.2% · 8th percentile
  63. 2026-08-02 09:33 UTCEG score recompute
  64. 2026-08-02 09:33 UTCGHSA enrichmentGHSA-p8vm-xf6w-g5jx
  65. 2026-08-02 02:24 UTCEPSS rescoreEPSS 0.2% · 8th percentile
  66. 2026-08-01 04:13 UTCEPSS rescoreEPSS 0.2% · 8th percentile
  67. 2026-07-30 16:25 UTCEPSS rescoreEPSS 0.2% · 8th percentile
  68. 2026-07-30 10:17 UTCNVD update
  69. 2026-07-30 09:56 UTCEG score recompute
  70. 2026-07-30 09:56 UTCMITRE cvelistV5first tracked

Frequently asked(4)

What is CVE-2022-4994?
CVE-2022-4994 is a vulnerability whose severity is not yet rated; its CVE record was 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 the CVE record for CVE-2022-4994 published?
The CVE record for CVE-2022-4994 was published on July 30, 2026. That is the record's publication date; the vulnerability itself may have been made public earlier. EchelonGraph's copy of the record carries a last-modified date of July 30, 2026; the record at its source may have been updated since.
Is CVE-2022-4994 actively exploited?
CVE-2022-4994 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.2% probability of exploitation in the next 30 days (8th percentile of EPSS-scored CVEs).
How do I remediate CVE-2022-4994?
A fix for CVE-2022-4994 is available: update to the fixed version the vendor names in its advisory. The vendor advisories EchelonGraph has for CVE-2022-4994 are linked in the Vendor Advisories panel on this page.

Dependency Blast Radius

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