BIT-PILLOW-2026-112393 Pillow: Heap buffer overflow in _tiffWriteProc when saving TIFF to BytesIO

Pillow is a Python imaging library. From 2.0.0 until 13.0.0, Pillow has a heap buffer overflow and stale-heap disclosure in tiffWriteProc when saving compressed TIFF data through libtiff to a target without a usable fileno, such as BytesIO. The callback sizes its allocation from the prior buffer...