CVE-2019-20633

Name: CVE-2019-20633
Creator: NVD / NIST
Published: 2020-03-25T17:15:14.013+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

MEDIUMCVSS 5.5/10EPSS 1.00%

Last modified Jun 17, 2026

CVE-2019-20633 is a medium-severity vulnerability rated 5.5/10 on the CVSS scale. 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.. EPSS estimates a 1.00% chance of exploitation in the next 30 days.

Description

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.

Metrics

CVSS 3.1

5.5/10

CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H

EPSS Probability

1.00%

58.3th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-415

Affected Software

Vendor	Product	Versions
Gnu	Patch	<= 2.7.6

References

https://savannah.gnu.org/bugs/index.php?56683Exploit, Vendor Advisory
https://savannah.gnu.org/bugs/index.php?56683Exploit, Vendor Advisory

Timeline

Published: Mar 25, 2020
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2019-20633?

How severe is CVE-2019-20633?

CVE-2019-20633 has a CVSS score of 5.5/10 (MEDIUM severity). The EPSS model estimates a 1.00% probability of exploitation in the next 30 days.

How do I fix CVE-2019-20633?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2019-20633?

Run a free Strix scan to check your systems for this vulnerability.

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Source: NVD / NIST