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An out of bounds write exists in FreeType versions 2.13.0 and below (newer versions of FreeType are not vulnerable) when attempting to parse font subglyph structures related to TrueType GX and variable font files. The vulnerable code assigns a signed short value to an unsigned long and then adds a static value causing it to wrap around and allocate too small of a heap buffer. The code then writes up to 6 signed long integers out of bounds relative to this buffer. This may result in arbitrary code execution. This vulnerability may have been exploited in the wild.

CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H

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FreeType 缓冲区错误漏洞

FreeType是FreeType开源的一款开源字体渲染库。 FreeType 2.13.0版本及之前版本存在缓冲区错误漏洞，该漏洞源于解析TrueType GX和可变字体文件时存在越界写入，可能导致执行任意代码。

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