CVE intelligence

CVE-2019-20633

Vulnerability intelligence

Published Mar 25, 2020Sources checked Oct 24, 2026

5.5MEDIUMCVSS out of 10

What this means

Review the available evidence

CVE-2019-20633 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 24, 2026

Release Notes CBL-Mariner Releases

Vendor-listed releases

2.7.6-7
2.7.6-8

CISA KEVNot listedBased on the latest collected catalog

EPSS1.0%Estimated 30-day exploitation probability

Ransomware useNot markedCISA KEV ransomware field

Threat actors0Source-linked actor relationships

Overview

What is CVE-2019-20633?

GNU patch through 2.7.6 contains a free(p_line[p_end]) Double Free vulnerability in the function another_hunk in pch.c that can cause a denial of service via a crafted patch file. NOTE: this issue exists because of an incomplete fix for CVE-2018-6952.

Source: NVD