Pillow: Arrow export leaks stale heap memory when PILLOW_ALIGNMENT > 1

影響: pip:Pillow >= 11.2.1, < 13.0.0 → 13.0.0

When [PILLOW_ALIGNMENT](https://pillow.readthedocs.io/en/stable/reference/block_allocator.html#memory-pools) is set above 1, exporting an image to Arrow returns uninitialized heap memory mixed in with the pixel data. That memory can include pixels from images the process freed earlier. Details With an alignment above 1, the default allocator pads each row up to aligned_linesize and starts the first row at an aligned offset into the block. It then exports im->blocks[0].ptr as xsize ysize tightly…

GitHub Advisory Database에서 읽기

2026. 10. 24. 오전 06:53, GitHub Advisory Database에서 "Pillow: Arrow export leaks stale heap memory when PILLOW_ALIGNMENT > 1"을(를) 게시했습니다 (유형: 취약점 권고). 심각도는 "보통"(medium)입니다. 관련 기술: Python. CVE: CVE-2026-114501.