Null Pointer Dereference in SubtableUnicodesCache::create leading to DoS
概要
Null Pointer Dereference in SubtableUnicodesCache::create leading to DoS
原文の説明
取得元が公開している説明をそのまま載せています (多くは英語)。
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.
出典: OSV.dev (Open Source Vulnerabilities) NVD GitHub Advisory OSV
ディストリビューション別の修正状況
各ディストリビューションが公開している、この CVE の修正パッケージ
- Debian DEBIAN-CVE-2026-22693 harfbuzz
参照URL
- advisory github.com
- advisory github.com
- advisory nvd.nist.gov
- patch github.com
- web openwall.com
- web openwall.com