How severe is CVE-2025-48509?

CVE-2025-48509 has a CVSS 4.0 base score of 1.8, rated low severity.

Is CVE-2025-48509 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (2nd percentile), an estimate of the probability of exploitation in the next 30 days.

How do I fix CVE-2025-48509?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

Does CVE-2025-48509 have an EU (EUVD) identifier?

Yes. CVE-2025-48509 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-207431.

When was CVE-2025-48509 published?

CVE-2025-48509 was published on 2026-02-10 and last updated on 2026-06-17.

CVE-2025-48509

CVE-2025-48509 is a low-severity vulnerability with a CVSS 4.0 base score of 1.8. 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-665.

Key facts

Severity: Low (CVSS 4.0 base score 1.8)
EPSS exploit prediction: 0% (2nd percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2025-207431
Weakness: CWE-665
Published: 2026-02-10
Last modified: 2026-06-17

Description

Missing Checks in certain functions related to RMP initialization can allow a local admin privileged attacker to cause misidentification of I/O memory, potentially resulting in a loss of guest memory integrity

Frequently asked questions

What is CVE-2025-48509?: Missing Checks in certain functions related to RMP initialization can allow a local admin privileged attacker to cause misidentification of I/O memory, potentially resulting in a loss of guest memory integrity
How severe is CVE-2025-48509?: CVE-2025-48509 has a CVSS 4.0 base score of 1.8, rated low severity.
Is CVE-2025-48509 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (2nd percentile), an estimate of the probability of exploitation in the next 30 days.
How do I fix CVE-2025-48509?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
Does CVE-2025-48509 have an EU (EUVD) identifier?: Yes. CVE-2025-48509 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-207431.
When was CVE-2025-48509 published?: CVE-2025-48509 was published on 2026-02-10 and last updated on 2026-06-17.

References

https://www.amd.com/en/resources/product-security/bulletin/AMD-SB-3023.html

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