CVE-2026-49295

libde265 is an open source implementation of the h.265 video codec. Prior to version 1.0.20, a crafted H.265 bitstream can cause an out-of-bounds array write in decoder_context::process_reference_picture_set() (libde265/decctx.cc:1376). The root cause is a missing aggregate bound check on predicted short-term reference picture set entries. Individual list sizes are validated, but the combined count after predicted RPS construction can exceed the 16-entry PocStFoll array, writing at index 16. Version 1.0.20 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-g2rg-wj66-w594 Fixed by: https://github.com/strukturag/libde265/commit/691f3a3c55b3d32478c4a49895dee061a282652 (v1.1.0)