Threats Tagged 'cve-2026-50142'

A high-severity integer overflow vulnerability exists in libheif versions 1.19.0 through 1.22.999, affecting the parsing of HEIF sequences with the msf1 brand. The flaw allows crafted input to cause unbounded heap allocation due to improper bounds checking and 32-bit arithmetic wraparound, potentially leading to memory exhaustion and process crashes. This issue is fixed in version 1.23.0.

libheif is a HEIF and AVIF file format decoder and encoder. Prior to version 1.22.1, the uncompressed HEIF decoder validates explicit icef compressed-unit offsets using unit_offset + unit_size. Because the addition can wrap, a crafted HEIF file can pass the range check and then construct a vector from iterators outside the compressed item buffer, producing an out-of-bounds heap read and crash. Version 1.22.1 patches the issue.

Multiple security vulnerabilities have been addressed in libheif with the release of version 1.23.0. These include heap buffer over-reads, out-of-bounds reads and writes, integer overflows, infinite loop denial-of-service, null pointer dereferences, and information disclosure issues. The vulnerabilities arise from malformed or crafted HEIF image files and affect various components such as overlay compositing, sample duration lookup, mask image decoding, and metadata parsing. The update also includes new API functions and other feature enhancements.