CVE-2026-22693
CVE-2026-22693 · Null Pointer Dereference in SubtableUnicodesCache::create leading to DoS
Esta página presenta datos de fuentes públicas de vulnerabilidades. Consulta el aviso original antes de actualizar.
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 5.3 · Media · EPSS 0,5% · Corrección disponible
- Publicación
- Actualización
Pila tecnológica: system
Productos y versiones afectados
harfbuzz
- Versiones
- < 12.3.0: Afectada
Sin corrección publicada
harfbuzz Debian:12
- Versiones
- 10.0.1-1
- 10.1.0-1
- 10.1.0-2
- 10.2.0-1
- 10.2.0-2
- 11.4.5-1
- 11.5.0-1
- 12.1.0-1
- 12.2.0-1
- 12.3.0-1
- 12.3.0-2
- 12.3.0-3
- 12.3.0-4
- 12.3.1-1
- 12.3.2-1
- 12.3.2-2
- 6.0.0+dfsg-3
- 8.0.0-1
- 8.0.0-2
- 8.0.0-3
- 8.0.1-1
- 8.3.0-1
- 8.3.0-2
- 9.0.0-1
- Intervalos de versiones afectados
- ECOSYSTEM: (−∞, +∞)
Sin corrección publicada
harfbuzz Debian:13
- Versiones
- 10.2.0-1
- Intervalos de versiones afectados
- ECOSYSTEM: < 10.2.0-1+deb13u1
Actualiza a 10.2.0-1+deb13u1
harfbuzz Debian:14
- Versiones
- 10.2.0-1
- 10.2.0-2
- 11.4.5-1
- 11.5.0-1
- 12.1.0-1
- 12.2.0-1
- 12.3.0-1
- 12.3.0-2
- 12.3.0-3
- Intervalos de versiones afectados
- ECOSYSTEM: < 12.3.0-4
Actualiza a 12.3.0-4
harfbuzz Ubuntu:24.04:LTS
- Versiones
- 8.0.1-1
- 8.0.1-1build1
- 8.3.0-2
- 8.3.0-2build1
- 8.3.0-2build2
- Intervalos de versiones afectados
- ECOSYSTEM: (−∞, +∞)
Sin corrección publicada
harfbuzz Ubuntu:25.10
- Versiones
- 10.2.0-1
- Intervalos de versiones afectados
- ECOSYSTEM: (−∞, +∞)
Sin corrección publicada
Fuentes originales
- https://github.com/harfbuzz/harfbuzz/security/advisories/GHSA-xvjr-f2r9-c7ww
- https://github.com/harfbuzz/harfbuzz/commit/1265ff8d990284f04d8768f35b0e20ae5f60daae
- http://www.openwall.com/lists/oss-security/2026/01/11/1
- http://www.openwall.com/lists/oss-security/2026/01/12/1
- https://nvd.nist.gov/vuln/detail/CVE-2026-22693