Not a U.S. government website. NDD is an independent vulnerability database by Volerion and is not affiliated with or endorsed by NIST or NVD.

CVE-2026-56289 Details

Description

GNU patch is vulnerable to a denial of service (DoS) due to improper validation of hunk (single block of changes in diff) line offsets in unified-diff input. A specially crafted patch can specify an extremely large line number, causing the application to enter an effectively infinite processing loop while attempting to locate the requested position. This results in excessive CPU consumption and prevents the process from completing. An attacker can trigger this behavior by supplying a malicious patch file, causing the utility to become unresponsive and require manual termination. This issue has been fixed in the commit faba04ef4f2b410257f76c1b9dc85e350929c4b9

Metrics

CVSS 3.x Severity and Vector Strings:

NIST: [email protected]CVSS-B:5.5 MEDIUMVector:CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

References to Advisories, Solutions, and Tools

By selecting these links, you will be leaving this site. These are references gathered from the official CVE record and are not endorsed by Volerion.

URL	Source(s)	Tag(s)
https://cert.pl/en/posts/2026/07/CVE-2026-56288	[email protected]	Third Party Advisory
https://cgit.git.savannah.gnu.org/cgit/patch.git/	[email protected]	Patch
https://cgit.git.savannah.gnu.org/cgit/patch.git/commit/?id=faba04ef4f2b410257f76c1b9dc85e350929c4b9	[email protected]	Patch

Weakness Enumeration

CWE-ID	CWE Name	Source
CWE-835	Loop with Unreachable Exit Condition ('Infinite Loop')	[email protected]

Affected Products

Product	Versions
gnu patch	<= 2.8.0
CPE cpe:2.3:a:gnu:patch:::::::: Remediation No remediation found in references.

Change History

3 change records found show changes

Date	Action	Recorded By
Jul 13, 2026	Initial Analysis	[email protected]
Jul 9, 2026	CVE Modified	CISA-ADP
Jul 9, 2026	New CVE Received	[email protected]