Is CVE-2025-22839 in the CISA KEV catalog?

No. CVE-2025-22839 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the CVSS severity of CVE-2025-22839?

CVE-2025-22839 has a CVSS v3 base score of 7.5 (HIGH).

What is the EPSS score for CVE-2025-22839?

CVE-2025-22839 has an EPSS score of 0.17% (7th percentile), estimating the probability of exploitation in the next 30 days.

How do I fix CVE-2025-22839?

Upgrade intel-microcode on debian 11 to 3.20250812.1~deb11u1 or later. Fixes are available for 2 affected products.

CVE & CISA-KEV Catalog

CVE-2025-22839

HIGH

7.5

CVSS v3

NVD

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.

CWE-1220

How to fix

Remediation Available

intel-microcodeDebian

Fixed in:3.20250812.1~deb11u1CVE-2025-22839

Fixed in:3.20250812.1~deb12u1CVE-2025-22839

Fixed in:3.20250812.1~deb13u1CVE-2025-22839

Fixed in:3.20250812.1CVE-2025-22839

intel-microcodeUbuntu

Fixed in:3.20250812.0ubuntu0.16.04.1+esm1USN-7866-1

Fixed in:3.20250812.0ubuntu0.18.04.1+esm1USN-7866-1

Fixed in:3.20250812.0ubuntu0.20.04.1+esm1USN-7866-1

Fixed in:3.20250812.0ubuntu0.22.04.1USN-7866-1

Fixed in:3.20250812.0ubuntu0.24.04.1USN-7866-1

Fixed in:3.20250812.0ubuntu0.25.10.1USN-7866-1

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 VectorAdjacent

Attack ComplexityHigh

Privileges RequiredHigh

User InteractionNone

ScopeChanged

Impact

ConfidentialityHigh

IntegrityHigh

AvailabilityLow

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

Exploit Intelligence

0.17%probability of exploitation in 30 days

7thpercentile

Low risk: more likely to be exploited than 7% of all known CVEs.

References

Other references2

Embed a live status badge for CVE-2025-22839

Markdown

[![CVE-2025-22839](https://tridentstack.com/cve/badge/CVE-2025-22839.svg)](https://tridentstack.com/cve/CVE-2025-22839)

HTML

<a href="https://tridentstack.com/cve/CVE-2025-22839"><img src="https://tridentstack.com/cve/badge/CVE-2025-22839.svg" alt="CVE-2025-22839"></a>

Find and fix vulnerabilities across your fleet

TridentStack Control continuously scans your Windows, macOS, and Linux fleet for known vulnerabilities, prioritizes them by severity and active exploitation, and patches them automatically.

Start free

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 2025-11-03.