CVE-2022-21166

MEDIUMNVD 5.55.5—
EchelonGraph scoreMEDIUM confidence

This medium-severity CVE scores 5.5 under NVD CVSS v3. EPSS exploit probability: 5.8%, top 8% of all CVEs by exploit prediction. GitHub Security Advisory data not yet ingested — confidence will rise once GHSA publishes (typical lag: hours to days for open-source ecosystem CVEs; never for infrastructure-only CVEs).

Triggered by: NVD CVSS baseline
Sources: epss, nvd
Trending — 3 sources updated this week
5.5
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS: 6%CVSS: 5.5Exploit: NoneExposed: 0

A fix is available — apply it.

Incomplete cleanup in specific special register write operations for some Intel(R) Processors may allow an authenticated user to potentially enable information disclosure via local access.

CVSS v3
5.5
EG Score
5.5(medium)
EPSS
92.3%
KEV
Not listed

Published

June 15, 2022

Last Modified

May 5, 2025

References (24)

Vendor Advisories for CVE-2022-21166(4)

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

Patch Availability(22)

Vendor / EcosystemFixed in / PatchReleasedSource
ubuntulinux-oem-5.14-tools-host (5.14.0-1044.49) @ focal2026-05-25ubuntu
ubuntuintel-microcode (3.20220510.0ubuntu0.16.04.1+esm1) @ xenial2026-05-25ubuntu
ubuntulinux-modules-4.4.0-1109-aws (4.4.0-1109.115) @ trusty2026-05-25ubuntu
ubuntulinux-headers-oem-22.04 (5.17.0.1013.12) @ jammy2026-05-25ubuntu
ubuntulinux-image-4.4.0-1110-kvm (4.4.0-1110.120) @ xenial2026-05-25ubuntu
ubuntulinux-image-lowlatency (3.13.0.190.199) @ trusty2026-05-25ubuntu
ubuntulinux-tools-aws-hwe (4.15.0.1136.123) @ xenial2026-05-25ubuntu
ubuntuintel-microcode (3.20220510.0ubuntu0.22.04.1) @ jammy2026-05-25ubuntu
redhatkernel-rt-0:5.14.0-70.36.1.rt21.108.el9_02022-12-13redhat
redhatkernel-0:5.14.0-70.36.1.el9_02022-12-13redhat
redhatmicrocode_ctl-4:20220809-1.el92022-11-15redhat
redhatkernel-rt-0:5.14.0-162.6.1.rt21.168.el9_12022-11-15redhat
redhatkernel-0:5.14.0-162.6.1.el9_12022-11-15redhat
redhatkernel-rt-0:4.18.0-193.93.1.rt13.143.el8_22022-11-01redhat
redhatkernel-0:4.18.0-193.93.1.el8_22022-11-01redhat
redhatkernel-0:4.18.0-305.65.1.el8_42022-10-18redhat
redhatkernel-rt-0:4.18.0-305.65.1.rt7.137.el8_42022-10-18redhat
redhatkernel-0:4.18.0-147.76.1.el8_12022-10-11redhat
redhatkernel-rt-0:4.18.0-372.26.1.rt7.183.el8_62022-09-13redhat
redhatkernel-0:4.18.0-372.26.1.el8_62022-09-13redhat
redhatkernel-0:3.10.0-1160.76.1.el72022-08-09redhat
redhatkernel-rt-0:3.10.0-1160.76.1.rt56.1220.el72022-08-09redhat

Patches are aggregated from vendor advisories (Red Hat, Microsoft, Cisco, GitHub) and package ecosystems (OSV, GHSA). Multiple rows for the same upstream release have been deduplicated.

Weakness Classification(1)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

Additional Vendor Advisories

(19)

Vendors that published advisories for this CVE beyond the curated set above. Broader coverage but minimal per-row detail — click through for the original advisory.

Data Freshness Timeline

(refreshed 13× in last 7d / 43× 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. 2026-07-22 22:54 UTCEG score recompute
  2. 2026-07-22 14:06 UTCEPSS rescore
  3. 2026-07-22 14:06 UTCEPSS rescore
  4. 2026-07-21 15:22 UTCEPSS rescore
  5. 2026-07-21 15:22 UTCEPSS rescore
  6. 2026-07-20 17:05 UTCEPSS rescore
  7. 2026-07-19 14:29 UTCEPSS rescore
  8. 2026-07-19 02:27 UTCEPSS rescore
  9. 2026-07-18 10:02 UTCEPSS rescore
  10. 2026-07-18 10:02 UTCEPSS rescore
  11. 2026-07-17 06:46 UTCOSV refresh
  12. 2026-07-16 17:00 UTCEPSS rescore
  13. 2026-07-16 17:00 UTCEPSS rescore
  14. 2026-07-15 16:56 UTCEPSS rescore
  15. 2026-07-15 16:56 UTCEPSS rescore
  16. 2026-07-15 01:58 UTCEPSS rescore
  17. 2026-07-15 01:58 UTCEPSS rescore
  18. 2026-07-13 22:27 UTCEPSS rescore
  19. 2026-07-12 05:44 UTCEPSS rescore
  20. 2026-07-11 08:25 UTCEPSS rescore
  21. 2026-07-09 19:07 UTCEPSS rescore
  22. 2026-07-08 15:12 UTCEPSS rescore
  23. 2026-07-07 13:44 UTCEPSS rescore
  24. 2026-07-06 16:25 UTCEPSS rescore
  25. 2026-07-06 16:25 UTCEPSS rescore
Show 66 more
  1. 2026-07-06 02:21 UTCEPSS rescore
  2. 2026-07-05 02:28 UTCEPSS rescore
  3. 2026-07-04 06:29 UTCEPSS rescore
  4. 2026-07-04 06:29 UTCEPSS rescore
  5. 2026-07-01 15:04 UTCEPSS rescore
  6. 2026-06-30 23:20 UTCEPSS rescore
  7. 2026-06-30 23:20 UTCEPSS rescore
  8. 2026-06-29 14:04 UTCEPSS rescore
  9. 2026-06-29 14:04 UTCEPSS rescore
  10. 2026-06-29 05:02 UTCOSV refresh
  11. 2026-06-28 04:54 UTCEPSS rescore
  12. 2026-06-28 04:54 UTCEPSS rescore
  13. 2026-06-27 03:07 UTCEPSS rescore
  14. 2026-06-25 13:48 UTCEPSS rescore
  15. 2026-06-24 14:03 UTCEPSS rescore
  16. 2026-06-24 14:03 UTCEPSS rescore
  17. 2026-06-23 21:31 UTCEPSS rescore
  18. 2026-06-23 21:31 UTCEPSS rescore
  19. 2026-06-22 14:24 UTCEPSS rescore
  20. 2026-06-21 14:55 UTCEPSS rescore
  21. 2026-06-21 01:58 UTCEPSS rescore
  22. 2026-06-21 01:58 UTCEPSS rescore
  23. 2026-06-18 17:51 UTCEPSS rescore
  24. 2026-06-18 17:51 UTCEPSS rescore
  25. 2026-06-17 17:51 UTCEPSS rescore
  26. 2026-06-17 17:51 UTCEPSS rescore
  27. 2026-06-16 17:51 UTCEPSS rescore
  28. 2026-06-15 17:46 UTCEPSS rescore
  29. 2026-06-14 23:15 UTCEPSS rescore
  30. 2026-06-14 23:15 UTCEPSS rescore
  31. 2026-06-13 22:58 UTCEPSS rescore
  32. 2026-06-13 22:58 UTCEPSS rescore
  33. 2026-06-12 23:10 UTCEPSS rescore
  34. 2026-06-11 23:27 UTCOSV refresh
  35. 2026-06-11 13:58 UTCEPSS rescore
  36. 2026-06-10 22:16 UTCEPSS rescore
  37. 2026-06-10 13:20 UTCEPSS rescore
  38. 2026-06-08 14:15 UTCEPSS rescore
  39. 2026-06-08 14:15 UTCEPSS rescore
  40. 2026-06-08 14:15 UTCEPSS rescore
  41. 2026-06-07 15:23 UTCEPSS rescore
  42. 2026-06-07 15:23 UTCEPSS rescore
  43. 2026-06-06 13:46 UTCEPSS rescore
  44. 2026-06-06 13:46 UTCEPSS rescore
  45. 2026-06-05 22:45 UTCEPSS rescore
  46. 2026-06-05 22:45 UTCEPSS rescore
  47. 2026-06-05 06:09 UTCEPSS rescore
  48. 2026-06-05 06:09 UTCEPSS rescore
  49. 2026-06-04 13:11 UTCEPSS rescore
  50. 2026-06-04 13:10 UTCEPSS rescore
  51. 2026-06-02 20:11 UTCEPSS rescore
  52. 2026-06-02 20:11 UTCEPSS rescore
  53. 2026-06-01 13:50 UTCEPSS rescore
  54. 2026-06-01 13:50 UTCEPSS rescore
  55. 2026-05-31 22:29 UTCEPSS rescore
  56. 2026-05-29 13:42 UTCEPSS rescore
  57. 2026-05-28 13:43 UTCEPSS rescore
  58. 2026-05-28 13:43 UTCEPSS rescore
  59. 2026-05-27 13:39 UTCEPSS rescore
  60. 2026-05-27 13:39 UTCEPSS rescore
  61. 2026-05-26 13:43 UTCEPSS rescore
  62. 2026-05-26 13:42 UTCEPSS rescore
  63. 2026-05-26 07:17 UTCEPSS rescore
  64. 2026-05-26 07:17 UTCEPSS rescore
  65. 2026-05-25 20:24 UTCEG score recompute
  66. 2026-05-25 20:24 UTCVendor advisory

Frequently asked(5)

What is CVE-2022-21166?
CVE-2022-21166 is a medium vulnerability published on June 15, 2022. Incomplete cleanup in specific special register write operations for some Intel(R) Processors may allow an authenticated user to potentially enable information disclosure via local access.
When was CVE-2022-21166 disclosed?
CVE-2022-21166 was first published in the National Vulnerability Database on June 15, 2022, with the most recent update on May 5, 2025. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2022-21166 actively exploited?
CVE-2022-21166 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 92.3% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.
What is the CVSS score of CVE-2022-21166?
CVE-2022-21166 has a CVSS v3 base score of 5.5 (NVD).
How do I remediate CVE-2022-21166?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2022-21166, 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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