Is CVE-2022-21233 in the CISA KEV catalog?

No. CVE-2022-21233 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the CVSS severity of CVE-2022-21233?

CVE-2022-21233 has a CVSS v3 base score of 5.5 (MEDIUM).

What is the EPSS score for CVE-2022-21233?

CVE-2022-21233 has an EPSS score of 0.32% (24th percentile), estimating the probability of exploitation in the next 30 days.

How do I fix CVE-2022-21233?

Upgrade intel-microcode on debian 11 to 3.20230214.1~deb11u1 or later. Fixes are available for 2 affected products.

CVE & CISA-KEV Catalog

CVE-2022-21233

MEDIUM

5.5

CVSS v3

NVD

Description

Improper isolation of shared resources in some Intel(R) Processors may allow a privileged user to potentially enable information disclosure via local access.

How to fix

Remediation Available

intel-microcodeDebian

Fixed in:3.20230214.1~deb11u1CVE-2022-21233

Fixed in:3.20220809.1CVE-2022-21233

intel-microcodeUbuntu

Fixed in:3.20220809.0ubuntu0.18.04.1USN-5612-1

Fixed in:3.20220809.0ubuntu0.20.04.1USN-5612-1

Fixed in:3.20220809.0ubuntu0.22.04.1USN-5612-1

Remediation is compiled from vendor and distribution security advisories. Always confirm against the linked source for your exact version and platform.

CVSS v3 Vector

Exploitability

Attack VectorLocal

Attack ComplexityLow

Privileges RequiredLow

User InteractionNone

ScopeUnchanged

Impact

ConfidentialityHigh

IntegrityNone

AvailabilityNone

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N

Exploit Intelligence

0.32%probability of exploitation in 30 days

24thpercentile

Low risk: more likely to be exploited than 24% of all known CVEs.

References

Vendor Advisory1

intel.com

Third-Party Advisory1

security.netapp.com

Other references1

lists.debian.org

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This product uses NVD data but is not endorsed or certified by the NVD. EPSS scores courtesy of FIRST.org (https://www.first.org/epss). Source: CISA KEV Catalog. Data as of 2025-05-05.