CVE-2026-27799

A flaw was found in ImageMagick, a software suite used for editing and manipulating digital images. This vulnerability, a heap buffer over-read, exists within the component that handles DJVU image files. A local attacker could exploit this by processing a specially crafted DJVU image, leading to an error where the software miscalculates memory allocation due to an integer truncation. This causes the software to attempt to read memory outside its designated boundaries, which can result in a denial of service or potentially corrupt data.

This MODERATE impact vulnerability in ImageMagick involves a heap buffer over-read within the DJVU image format handler. The flaw occurs due to an integer truncation during stride calculation for pixel buffer allocation, leading to out-of-bounds memory reads when processing a specially crafted DJVU image. Red Hat Enterprise Linux 6 ELS and 7 ELS are affected.

The CVSS score(s) listed for this vulnerability do not reflect the associated product's status, and are included for informational purposes to better understand the severity of this vulnerability.

To mitigate this issue, avoid processing untrusted DJVU image files with ImageMagick. For server deployments, restrict network access to services that use ImageMagick for image processing. As an additional measure, consider disabling the DJVU delegate in ImageMagick's policy.xml configuration to prevent the processing of DJVU files. This may impact functionality that relies on DJVU image support.