Published Sep 24, 2026Sources checked Oct 21, 2026
6.2MEDIUMCVSS out of 10
What this means
Review the available evidence
CVE-2026-88383 and is rated Medium severity with a CVSS score of 6.2. 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 14, 2026
Release Notes
Vendor-listed releases
3.0.10-2
CISA KEVNot listedBased on the latest collected catalog
EPSS0.1%Estimated 30-day exploitation probability
Ransomware useNot markedCISA KEV ransomware field
Threat actors0Source-linked actor relationships
Overview
What is CVE-2026-88383?
libical 4.0.6 contains an incompatible function pointer in icalparameter_string_to_kind().
When parsing iCalendar data containing a parameterized property, the function passes icalparameter_compare_kind_map() to bsearch() through an incompatible comparator function pointer type. bsearch() invokes the callback through the mismatched type, resulting in undefined behavior and process termination, leading to denial of service.