CVE-2005-4470: Blender Blenloader

High severity, CVSS 7.5. EPSS: 5.8% chance of exploitation in the next 30 days.

Heap-based buffer overflow in the get_bhead function in readfile.c in Blender BlenLoader 2.0 through 2.40pre allows remote attackers to cause a denial of service (application crash) and possibly execute arbitrary code via a .blend file with a negative bhead.len value, which causes less memory to be allocated than expected, possibly due to an integer overflow.

Affected products

• Blender Blenloader: up to and including 2.40_pre; version 2.0 only; version 2.04 only; version 2.25 only; version 2.26 only; version 2.27 only; …

Published 2005-12-22. Last modified 2026-06-16.