CVE-2019-20633: GNU Patch

Medium severity, CVSS 5.5. EPSS: 1% chance of exploitation in the next 30 days.

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.

Affected products

• GNU Patch: up to and including 2.7.6

Published 2020-03-25. Last modified 2026-06-17.