Double Free Affecting patch package, versions *


Severity

Recommended
low

Based on Ubuntu security rating.

Threat Intelligence

EPSS
1% (59th percentile)

Do your applications use this vulnerable package?

In a few clicks we can analyze your entire application and see what components are vulnerable in your application, and suggest you quick fixes.

Test your applications
  • Snyk IDSNYK-UBUNTU2404-PATCH-6718680
  • published16 Jul 2026
  • disclosed25 Mar 2020

Introduced: 25 Mar 2020

CVE-2019-20633  (opens in a new tab)
CWE-415  (opens in a new tab)

How to fix?

There is no fixed version for Ubuntu:24.04 patch.

NVD Description

Note: Versions mentioned in the description apply only to the upstream patch package and not the patch package as distributed by Ubuntu. See How to fix? for Ubuntu:24.04 relevant fixed versions and status.

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.

CVSS Base Scores

version 3.1