Vulnerability Information
Although we use advanced large model technology, its output may still contain inaccurate or outdated information.Shenlong tries to ensure data accuracy, but please verify and judge based on the actual situation.
Vulnerability Title
Null Pointer Dereference in SubtableUnicodesCache::create leading to DoS
Vulnerability Description
HarfBuzz is a text shaping engine. Prior to version 12.3.0, a null pointer dereference vulnerability exists in the SubtableUnicodesCache::create function located in src/hb-ot-cmap-table.hh. The function fails to check if hb_malloc returns NULL before using placement new to construct an object at the returned pointer address. When hb_malloc fails to allocate memory (which can occur in low-memory conditions or when using custom allocators that simulate allocation failures), it returns NULL. The code then attempts to call the constructor on this null pointer using placement new syntax, resulting in undefined behavior and a Segmentation Fault. This issue has been patched in version 12.3.0.
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
Vulnerability Type
空指针解引用
Vulnerability Title
HarfBuzz 安全漏洞
Vulnerability Description
HarfBuzz是HarfBuzz开源的一款用于OpenType字体的文本引擎。 HarfBuzz 12.3.0之前版本存在安全漏洞，该漏洞源于SubtableUnicodesCache::create函数未检查hb_malloc返回值，可能导致空指针取消引用和分段违规。
CVSS Information
N/A
Vulnerability Type
N/A