CVE-2026-49346

libde265 is an open source implementation of the h.265 video codec. Prior to version 1.1.0, a crafted H.265 bitstream with large SPS dimensions and 16-bit bit depth causes a signed integer overflow in de265_image_get_buffer() (libde265/image.cc:128). The overflow wraps the plane allocation size to a small value (~1 KB), but the subsequent fill_image() call computes the real size using size_t, writing ~4 GB into the undersized heap buffer. Version 1.1.0 patches the issue.

• libde265 1.1.1-1 (bug https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=1140431) https://github.com/strukturag/libde265/security/advisories/GHSA-vv8h-932h-7r86 Fixed by: https://github.com/strukturag/libde265/commit/8a1b5cf212f78e1c77cb46eb5d56e492a9336eb8 (v1.1.0)