CVE-2026-97185 in GIMP
Summary
by MITRE • 09/24/2026
A flaw was found in GIMP. When processing a specially crafted GIMPressionist preset file, the plug-in does not properly validate vector indices before writing into fixed-size arrays. This can lead to an out-of-bounds write, corrupting memory. An attacker could exploit this by convincing a user to load a malicious preset file, potentially causing a crash or enabling arbitrary code execution.
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Analysis
by VulDB Data Team • 09/24/2026
The vulnerability identified in GIMP represents a critical security flaw within the GIMPressionist plugin architecture, specifically concerning the handling of vector indices during the processing of preset files. This issue stems from an insufficient validation mechanism where the application fails to verify that input data falls within acceptable bounds before utilizing those values as offsets for memory operations. When a user loads a specially crafted GIMPressionist preset file, the software attempts to write data into fixed-size arrays based on indices derived directly from the untrusted input without performing necessary range checks. This lack of boundary verification allows an attacker to supply index values that exceed the allocated size of these internal buffers, resulting in an out-of-bounds write condition. Such memory corruption is particularly dangerous because it disrupts the integrity of adjacent memory structures and can overwrite critical control data within the application's process space.
From a technical perspective, this flaw aligns with Common Weakness Enumeration (CWE) category CWE-787: Out-of-bounds Write. The core issue lies in the absence of rigorous input sanitization and boundary checking prior to array access operations. In C-based applications like GIMP, which manage memory manually, such errors are prevalent when developers assume that external inputs will always conform to expected dimensions. By exploiting this weakness, an attacker can manipulate the program's execution flow or corrupt heap metadata. The immediate operational impact of this vulnerability is typically a denial of service manifested as a crash due to segmentation faults triggered by accessing invalid memory addresses. However, in more sophisticated exploitation scenarios involving specific memory layouts and compiler protections that have been bypassed, this out-of-bounds write can be leveraged to achieve arbitrary code execution. This transforms what might initially appear as a simple stability issue into a severe remote code execution vector if the user is tricked into opening a malicious file.
The attack scenario requires social engineering elements where an adversary convinces a victim to open or load a compromised preset file within GIMP. While this does not constitute a network-based remote exploit, it falls under the broader category of client-side attacks that rely on user interaction with untrusted content. In terms of cybersecurity frameworks such as MITRE ATT&CK, this behavior is consistent with techniques involving malicious files and potential exploitation for initial access or privilege escalation depending on the context in which GIMP is run. The vulnerability highlights the risks associated with plugins and extensions that process complex file formats without implementing robust defensive coding practices. It underscores the necessity of validating all external inputs against defined constraints before they are used to determine memory allocation sizes or array indices, a fundamental principle in secure software development lifecycle management.
Mitigation strategies for this vulnerability involve both immediate patching by the GIMP maintainers and proactive measures for users and developers. The primary remediation is the application of an official security update that patches the specific code path responsible for processing preset files, ensuring that all vector indices are validated against array bounds before any write operations occur. For organizations deploying GIMP in enterprise environments, it is advisable to restrict the use of third-party plugins or presets from untrusted sources until the patch is verified and deployed. Additionally, enabling memory protection mechanisms such as Address Space Layout Randomization (ASLR) and Data Execution Prevention (DEP) can mitigate the likelihood of successful code execution by making it more difficult for attackers to predict target addresses in memory. Developers should also adopt static analysis tools and fuzzing techniques during the development phase to detect similar out-of-bounds access patterns early, thereby preventing such vulnerabilities from reaching production releases. Regular security audits focusing on input validation logic are essential to maintain the integrity of image processing software that handles diverse and potentially malicious file formats.