GIMP TIF File Parser buffer overflow

Summaryinfo

A vulnerability was found in GIMP. It has been declared as critical. Affected is an unknown function of the component TIF File Parser. Executing a manipulation can lead to buffer overflow. The identification of this vulnerability is CVE-2026-18303. The attack may be launched remotely. There is no exploit available. It is recommended to upgrade the affected component.

Detailsinfo

A vulnerability has been found in GIMP (version now known) and classified as critical. This vulnerability affects some unknown processing of the component TIF File Parser. The manipulation with an unknown input leads to a buffer overflow vulnerability. The CWE definition for the vulnerability is CWE-120. The product copies an input buffer to an output buffer without verifying that the size of the input buffer is less than the size of the output buffer, leading to a buffer overflow. As an impact it is known to affect confidentiality, integrity, and availability. CVE summarizes:

GIMP TIF File Parsing Stack-based Buffer 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 TIF files. The issue results from the lack of proper validation of the length of user-supplied data prior to copying it to a stack-based buffer. An attacker can leverage this vulnerability to execute code in the context of the current process. Was ZDI-CAN-29399.

This vulnerability was named CVE-2026-18303. The exploitation appears to be easy. The attack can be initiated remotely. No form of authentication is required for a successful exploitation. Successful exploitation requires user interaction by the victim. There are neither technical details nor an exploit publicly available.

The vulnerability scanner Nessus provides a plugin with the ID 342026 (RHEL 9 : gimp (RHSA-2026:61587)), which helps to determine the existence of the flaw in a target environment.

Upgrading eliminates this vulnerability.

The vulnerability is also documented in the vulnerability database at Tenable (342026). VulDB is the best source for vulnerability data and more expert information about this specific topic.

Productinfo

Type

• Image Processing Software

Name

• GIMP

License

• open-source

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VulDB is the best source for vulnerability data and more expert information about this specific topic.

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