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VULNERABILITIES

CVE-2026-56288 Details

Description

GNU patch is vulnerable to a NULL pointer dereference when processing a specially crafted unified-diff patch file. Improper handling of consecutive end-of-file newline markers can corrupt internal hunk (single block of changes in diff) data structures, causing the application to pass a NULL pointer to fwrite() during patch processing. An attacker can trigger this condition with a malicious patch file, causing the utility to crash and resulting in a denial of service. This issue has been fixed in the commit e6d6a4e021660679d7fc9150f981d4920f722313

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

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URLSource(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]PatchProduct
https://cgit.git.savannah.gnu.org/cgit/patch.git/commit/?id=e6d6a4e021660679d7fc9150f981d4920f722313 [email protected]Patch

Weakness Enumeration

CWE-IDCWE NameSource
CWE-476NULL Pointer Dereference[email protected]

Affected Products

ProductVersions
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

QUICK INFO

CVE Dictionary Entry:
CVE-2026-56288
NVD Published Date:
Jul 9, 2026
NVD Last Modified:
Jul 13, 2026
Source:
[email protected]
CVE-2026-56288 Details - Not Deferred