Bug 2520587 (CVE-2026-18300)

Summary:	CVE-2026-18300 gimp: gegl: GIMP: Remote code execution via integer overflow in HDR file parsing
Product:	[Other] Security Response	Reporter:	OSIDB Bzimport <bzimport>
Component:	vulnerability	Assignee:	Product Security DevOps Team <prodsec-dev>
Status:	NEW ---	QA Contact:
Severity:	high	Docs Contact:
Priority:	high
Version:	unspecified	CC:	rhel-process-autobot, watson-tool-maintainers
Target Milestone:	---	Keywords:	Security
Target Release:	---
Hardware:	All
OS:	Linux
Whiteboard:
Fixed In Version:		Doc Type:	---
Doc Text:	A flaw was found in GIMP, specifically within the parsing of High Dynamic Range (HDR) files. This integer overflow vulnerability occurs due to insufficient validation of user-supplied data before memory allocation. A remote attacker could exploit this by convincing a user to open a specially crafted malicious HDR file, leading to arbitrary code execution in the context of the current process.	Story Points:	---
Clone Of:		Environment:
Last Closed:		Type:	---
Regression:	---	Mount Type:	---
Documentation:	---	CRM:
Verified Versions:		Category:	---
oVirt Team:	---	RHEL 7.3 requirements from Atomic Host:
Cloudforms Team:	---	Target Upstream Version:
Embargoed:
Bug Depends On:	2521117, 2521118
Bug Blocks:

Description OSIDB Bzimport 2026-08-20 16:54:53 UTC

GIMP HDR File Parsing Integer Overflow Remote Code Execution Vulnerability. This vulnerability allows remote attackers to execute arbitrary code on affected installations of GIMP. User interaction is required to exploit this vulnerability in that the target must visit a malicious page or open a malicious file.

The specific flaw exists within the parsing of HDR files. The issue results from the lack of proper validation of user-supplied data, which can result in an integer overflow before allocating a buffer. An attacker can leverage this vulnerability to execute code in the context of the current process. Was ZDI-CAN-29289.

Comment 3 errata-xmlrpc 2026-09-01 19:26:39 UTC

This issue has been addressed in the following products:

  Red Hat Enterprise Linux 9

Via RHSA-2026:62170 https://access.redhat.com/errata/RHSA-2026:62170

Comment 4 errata-xmlrpc 2026-09-02 08:02:24 UTC

This issue has been addressed in the following products:

  Red Hat Enterprise Linux 8

Via RHSA-2026:62420 https://access.redhat.com/errata/RHSA-2026:62420

Comment 5 errata-xmlrpc 2026-09-02 08:26:26 UTC

This issue has been addressed in the following products:

  Red Hat Enterprise Linux 8

Via RHSA-2026:62425 https://access.redhat.com/errata/RHSA-2026:62425