Published Aug 20, 2026Sources checked Oct 28, 2026
5.3MEDIUMCVSS out of 10
What this means
Review the available evidence
CVE-2022-4996 and is rated Medium severity with a CVSS score of 5.3. 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: Sep 25, 2026
Release Notes
CISA KEVNot listedBased on the latest collected catalog
EPSS0.6%Estimated 30-day exploitation probability
Ransomware useNot markedCISA KEV ransomware field
Threat actors0Source-linked actor relationships
Overview
What is CVE-2022-4996?
A flaw has been found in mruby 3.1.0. Affected is the function udiv of the file bigint.c.
Executing a manipulation can lead to floating point comparison with incorrect operator. It is possible to launch the attack remotely.
The exploit has been published and may be used. It is best practice to apply a patch to resolve this issue.