Executive brief
Mozilla Firefox is a popular web browser used to access the internet. A vulnerability in its image processing library could allow a malicious website to cause an integer overflow, potentially leading to a browser crash or unauthorized code execution. This could compromise the user's data or the stability of the application.
Technical details
An integer overflow vulnerability was identified in the Graphics: ImageLib component of Mozilla Firefox. The flaw occurs during the processing of image data, where improper handling of arithmetic operations can lead to memory corruption. An attacker could exploit this by enticing a user to visit a specially crafted website or view a malicious image, potentially leading to an application crash or arbitrary code execution within the context of the browser process. This issue was resolved in Firefox 153.
Affected products
- Mozilla Firefox < 153
Timeline
- 2026-07-21: disclosed
- 2026-07-21: patched