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…

在 GitHub Advisory Database 阅读

2026/10/24 06:53，GitHub Advisory Database 发布了“Pillow: Arrow export leaks stale heap memory when PILLOW_ALIGNMENT > 1”（类型：漏洞公告）。严重程度为“中危”（medium）。相关技术：Python。CVE：CVE-2026-114501。