How severe is CVE-2025-22839?

CVE-2025-22839 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over an adjacent network with high attack complexity, requires high privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability low.

Is CVE-2025-22839 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (7th percentile), an estimate of the probability of exploitation in the next 30 days.

How do I fix CVE-2025-22839?

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-2025-22839 have an EU (EUVD) identifier?

Yes. CVE-2025-22839 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-24420.

When was CVE-2025-22839 published?

CVE-2025-22839 was published on 2025-08-12 and last updated on 2026-06-17.

CVE-2025-22839

CVE-2025-22839 is a high-severity vulnerability with a CVSS 3.x base score of 7.5. 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-1220.

Key facts

Severity: High (CVSS 3.x base score 7.5)
CVSS v4: 7.3
EPSS exploit prediction: 0% (7th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2025-24420
Weakness: CWE-1220
Published: 2025-08-12
Last modified: 2026-06-17

Description

Insufficient granularity of access control in the OOB-MSM for some Intel(R) Xeon(R) 6 Scalable processors may allow a privileged user to potentially enable escalation of privilege via adjacent access.

Frequently asked questions

What is CVE-2025-22839?: Insufficient granularity of access control in the OOB-MSM for some Intel(R) Xeon(R) 6 Scalable processors may allow a privileged user to potentially enable escalation of privilege via adjacent access.
How severe is CVE-2025-22839?: CVE-2025-22839 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over an adjacent network with high attack complexity, requires high privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability low.
Is CVE-2025-22839 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (7th percentile), an estimate of the probability of exploitation in the next 30 days.
How do I fix CVE-2025-22839?: 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-2025-22839 have an EU (EUVD) identifier?: Yes. CVE-2025-22839 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-24420.
When was CVE-2025-22839 published?: CVE-2025-22839 was published on 2025-08-12 and last updated on 2026-06-17.

References

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