CVE-2026-50142
Gravedad CVSS v3.1:
ALTA
Tipo:
CWE-190
Desbordamiento o ajuste de enteros
Fecha de publicación:
18/08/2026
Última modificación:
18/08/2026
Descripción
*** Pendiente de traducción *** libheif is a HEIF and AVIF file format decoder and encoder. From 1.19.0 until 1.23.0, a crafted HEIF sequence accepted by heif_context_read_from_memory() with the msf1 sequence brand can cause unbounded heap allocation. In libheif/sequences/seq_boxes.cc, Box_stsz::parse() applies max_sequence_frames only to variable-size samples, so fixed-size mode accepts an attacker-controlled sample_count without a bound. In libheif/sequences/track.cc, Track::load() also adds current_sample_idx and samples_per_chunk in 32-bit arithmetic, allowing the consistency check to be bypassed by wraparound. The resulting values reach the Chunk::Chunk() allocation path, which can consume gigabytes of memory and crash or stall the process through memory exhaustion. This issue is fixed in version 1.23.0.
Impacto
Puntuación base 3.x
7.50
Gravedad 3.x
ALTA