A vulnerability, which was classified as problematic , has been found in GPAC up to 26.1.x . This affects the function gf_ac4_pres_b_4_back_channels_present of the file /media_tools/av_parsers.c of the component MP4Box . The manipulation leads to null pointer dereference. This vulnerability is referenced as CVE-2025-60483 . The attack can only be performed from a local environment. No exploit is available. It is advisable to upgrade the affected component.