An issue has been found in libde265 v1.0.8 due to incorrect access control. A SEGV caused by a READ memory access in function derive_boundaryStrength of deblock.cc has occurred. The vulnerability causes a segmentation fault and application crash, which leads to remote denial of service.
https://github.com/strukturag/libde265/issues/302
https://lists.debian.org/debian-lts-announce/2022/12/msg00027.html