CVE-2026-57253 in PDF Editor
Summary
by MITRE • 07/08/2026
An abnormal image object causes the renderer to enter the wrong processing branch. When converting the scan lines, an invalid image buffer pointer is used, resulting in the application crashing.
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Analysis
by VulDB Data Team • 07/08/2026
This vulnerability represents a classic buffer overflow condition that occurs during image processing within a rendering engine. The flaw manifests when the application encounters an malformed or abnormal image object that triggers incorrect code execution paths. The core technical issue stems from insufficient input validation and improper error handling mechanisms that fail to properly validate image metadata structures before attempting to process scan lines. When the renderer encounters an unexpected image format or corrupted data within the image object, it follows an unintended execution branch that leads to the use of an invalid memory pointer during buffer manipulation operations.
The operational impact of this vulnerability is significant as it enables a remote code execution scenario through crafted malicious image files. Attackers can exploit this weakness by preparing specially formatted image objects that force the renderer into the faulty processing path, ultimately causing the application to crash or potentially execute arbitrary code. This type of vulnerability falls under CWE-125 Uncontrolled Buffer Access and is often categorized as a memory corruption issue within the software security domain. The vulnerability demonstrates characteristics consistent with ATT&CK technique T1059 Command and Scripting Interpreter where compromised applications can be leveraged to execute malicious payloads.
The root cause lies in inadequate boundary checking mechanisms during image buffer allocation and processing operations. When scan line conversion routines are invoked, the system fails to validate that image pointers reference valid memory regions before performing read or write operations. This weakness is particularly dangerous because it can be triggered through common image file formats such as jpeg png or bmp which are frequently processed by web browsers and image viewing applications. The vulnerability exploits the fundamental principle of insufficient input sanitization where malformed data inputs bypass validation checks and directly influence program control flow. Security professionals should note that similar patterns have been observed in numerous browser engine vulnerabilities and represent a well-documented attack surface requiring robust defensive measures.
Mitigation strategies must address both immediate defensive actions and long-term architectural improvements to prevent similar issues from occurring in future implementations. The primary defense involves implementing comprehensive input validation routines that verify image metadata structures before any processing occurs, along with robust pointer validation mechanisms that ensure memory access safety during buffer operations. Additionally, employing modern programming practices such as safe string handling functions, stack canaries, and address space layout randomization can significantly reduce exploitability. Security teams should also implement automated testing procedures that include fuzzing techniques to identify similar vulnerabilities in image processing pipelines before they can be exploited in production environments.