Bug 2546668 (CVE-2026-106063)

Summary: CVE-2026-106063 GIMP: GIMP: heap buffer overflow in DICOM export on oversized image dimensions
Product: [Other] Security Response Reporter: OSIDB Bzimport <bzimport>
Component: vulnerabilityAssignee: Product Security <prodsec-ir-bot>
Status: NEW --- QA Contact:
Severity: medium Docs Contact:
Priority: medium    
Version: unspecifiedCC: rhel-process-autobot, watson-tool-maintainers
Target Milestone: ---Keywords: Security
Target Release: ---   
Hardware: All   
OS: Linux   
Whiteboard:
Fixed In Version: Doc Type: ---
Doc Text:
A heap-based buffer overflow was found in GIMP’s DICOM export plug-in. When exporting an image with extremely large width and height, the export path allocates a buffer using a 32-bit width * height (and bytes-per-pixel) product that can overflow. GEGL then writes the full uncompressed extent into the undersized buffer, after integer overflow in the allocation size
 Story Points: ---
Clone Of: Environment:
Last Closed: Type: ---
Regression: --- Mount Type: ---
Documentation: --- CRM:
Verified Versions: Category: ---
oVirt Team: --- RHEL 7.3 requirements from Atomic Host:
Cloudforms Team: --- Target Upstream Version:
Embargoed:
Bug Depends On: 2546685    
Bug Blocks:    

Description OSIDB Bzimport 2026-10-06 16:35:15 UTC 
Finding 3. plug-ins/common/file-dicom.c, export_image() (~1649–1652). Wrapped width * height * bpp allocation; GEGL write exceeds buffer. SIGSEGV/ASan WRITE. Vector: export to DICOM on very large image (multi‑GB scale), not a small malicious download alone. CVSS tentative: AV:L/AC:H/PR:N/UI:R/S:U/C:N/I:H/A:H (6.3).