Published Sep 11, 2025Sources checked Nov 14, 2026
5.5MEDIUMCVSS out of 10
What this means
Review the available evidence
CVE-2025-39789 and is rated Medium severity with a CVSS score of 5.5. It is not in the current CISA KEV record we collected. That does not prove exploitation has not occurred.
What to do next
Remediation and response
Microsoft Security Response Center guidance
Vendor revision: Oct 3, 2026
Release Notes
CISA KEVNot listedBased on the latest collected catalog
EPSS0.2%Estimated 30-day exploitation probability
Ransomware useNot markedCISA KEV ransomware field
Threat actors0Source-linked actor relationships
Overview
What is CVE-2025-39789?
In the Linux kernel, the following vulnerability has been resolved:
crypto: x86/aegis - Add missing error checks
The skcipher_walk functions can allocate memory and can fail, so checking for errors is necessary.