How severe is CVE-2023-42667?

CVE-2023-42667 has a CVSS 3.x base score of 7.8, rated high severity. It is exploitable over local access with high attack complexity, requires low privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2023-42667 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (15th percentile), an estimate of the probability of exploitation in the next 30 days.

How do I fix CVE-2023-42667?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.

Does CVE-2023-42667 have an EU (EUVD) identifier?

Yes. CVE-2023-42667 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2023-47099.

When was CVE-2023-42667 published?

CVE-2023-42667 was published on 2024-08-14 and last updated on 2026-06-17.

CVE-2023-42667

CVE-2023-42667 is a high-severity vulnerability with a CVSS 3.x base score of 7.8. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-1189.

Key facts

Severity: High (CVSS 3.x base score 7.8)
CVSS v4: 7.3
EPSS exploit prediction: 0% (15th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2023-47099
Weakness: CWE-1189
Published: 2024-08-14
Last modified: 2026-06-17

Description

Improper isolation in the Intel(R) Core(TM) Ultra Processor stream cache mechanism may allow an authenticated user to potentially enable escalation of privilege via local access.

Frequently asked questions

What is CVE-2023-42667?: Improper isolation in the Intel(R) Core(TM) Ultra Processor stream cache mechanism may allow an authenticated user to potentially enable escalation of privilege via local access.
How severe is CVE-2023-42667?: CVE-2023-42667 has a CVSS 3.x base score of 7.8, rated high severity. It is exploitable over local access with high attack complexity, requires low privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2023-42667 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (15th percentile), an estimate of the probability of exploitation in the next 30 days.
How do I fix CVE-2023-42667?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
Does CVE-2023-42667 have an EU (EUVD) identifier?: Yes. CVE-2023-42667 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2023-47099.
When was CVE-2023-42667 published?: CVE-2023-42667 was published on 2024-08-14 and last updated on 2026-06-17.

References

https://www.intel.com/content/www/us/en/security-center/advisory/intel-sa-01038.html

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