CVE-2026-47251
Gravedad CVSS v4.0:
MEDIA
Tipo:
CWE-125
Lectura fuera de límites
Fecha de publicación:
21/07/2026
Última modificación:
22/07/2026
Descripción
*** Pendiente de traducción *** libheif is a HEIF and AVIF file format decoder and encoder. The fix for CVE-2026-3949 (commit `b97c8b5`, PR #1712) introduced an integer overflow in the very security check it added. The check itself can be bypassed, allowing a crafted HEIF file with a VVC track to trigger the same out-of-bounds heap read that CVE-2026-3949 was meant to prevent. This is a separate, currently-unpatched vulnerability. Issue #1712 was closed as fixed without testing the edge case where `size` is near `UINT32_MAX`. Version 1.22.0 patches the issue.
Impacto
Puntuación base 4.0
6.80
Gravedad 4.0
MEDIA