Description
LIBPNG is a reference library for use in applications that process PNG (Portable Network Graphics) raster image files. In version 1.8.0, three inter-frame chunk discard paths in the push-mode APNG parser clear the chunk-header flag without consuming the chunk body and CRC, allowing attacker-controlled bytes inside an ignored ancillary chunk to be reinterpreted as a fresh chunk header on the next call to `png_process_data`. Commit faf06924688b62d7c1654b5ceddedbde66ffadb4 fixes the issue.
Problem types
CWE-436: Interpretation Conflict
Product status
References
www.openwall.com/lists/oss-security/2026/05/15/21
github.com/...libpng/security/advisories/GHSA-c4v6-gxrq-6g2x
github.com/...ommit/faf06924688b62d7c1654b5ceddedbde66ffadb4