CVE-2026-66759 Gimp: out-of-bounds read in file-icns plugin causes information disclosure or crash on crafted icns images

A flaw was found in the file-icns plugin in GIMP. When applying a decompressed mask during ICNS image processing, the plugin reads from the mask data buffer without verifying if the cursor exceeds the allocated resource size. If a crafted file contains a truncated mask resource, the icnsdecompres...