The vulnerability of the bdf_char() function in the PIL/BdfFontFile.py library for working with images in the Python Pillow library allows a attacker to cause a service failure.

The vulnerability of the bdfchar function in the PIL/BdfFontFile.py library for working with images in the Python Pillow library is related to uncontrolled memory allocation. Exploiting this vulnerability could allow a remote attacker to cause a service failure...

CVE-2026-55379: Memory Allocation with Excessive Size Value

Pillow is a Python imaging library. Prior to 12.3.0, PIL/BdfFontFile.py bdfchar read the BBX width and height field from a BDF font file and passed attacker-controlled dimensions to Image.new without calling Image.decompressionbombcheck, bypassing Pillow's documented decompression bomb protection...