CVE-2026-45383 libde265 has a heap buffer overflow (OOB read) in decode_slice_unit_WPP() via out-of-bounds CtbAddrRStoTS access — libde265 <= v1.0.18

libde265 is an open source implementation of the h.265 video codec. Versions prior to 1.0.19 have a heap buffer overflow out-of-bounds READ exists in decodercontext::decodesliceunitWPP in libde265/decctx.cc. When decoding a WPP Wavefront Parallel Processing HEVC slice, ctbAddrRS is computed as...

CVE-2026-45383

CVE-2026-45383 affects libde265 prior to 1.0.19, where a heap-buffer-overflow can occur during HEVC WPP slice decoding. In decoder_context::decode_slice_unit_WPP(), ctbAddrRS is computed as ctbRow*ctbsWidth and, if PPS/SPS headers encode a value that exceeds pps.CtbAddrRStoTS.size(), an out-of-bo...