Description
Blender before 4.5.15 and 5.x before 5.2.3 contains a heap out-of-bounds access vulnerability in read_struct() that skips size validation when a .blend file's SDNA struct layout compares equal. Attackers can supply a crafted .blend file with short blocks so field reads, writes, and pointer dereferences overrun heap memory, causing crashes or code execution.
Metrics
CVSS 3.1 7.8/10
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:HWeakness enumeration
Affected software
| Vendor | Product | Versions |
|---|---|---|
| Blender Foundation | Blender | < 4.5.15; >= 5.0.0, < 5.2.3 |
References
- https://projects.blender.org/blender/blenderProduct
- https://projects.blender.org/blender/blender/commit/7de4986e74ed47f67e78eb4b76609bb6d1ae8a0ePatch
- https://projects.blender.org/blender/blender/commit/c5d6faf04bf3f17efb6c404896ef0e7427784da5Patch
- https://projects.blender.org/blender/blender/pulls/164279Issue Tracking, Patch
- https://www.vulncheck.com/advisories/blender-before-4.5.15-and-5-x-before-5.2.3-heap-out-of-bounds-access-via-read-structThird Party Advisory
Timeline
- Published
- Oct 30, 2026
- Last modified
- Nov 3, 2026
- NVD status
- Analyzed