CVE-2023-40476

GStreamer H265 Parsing Stack-based Buffer Overflow Remote Code Execution
Vulnerability. This vulnerability allows remote attackers to execute
arbitrary code on affected installations of GStreamer. Interaction with
this library is required to exploit this vulnerability but attack vectors
may vary depending on the implementation. The specific flaw exists within
the parsing of H265 encoded video files. The issue results from the lack of
proper validation of the length of user-supplied data prior to copying it
to a fixed-length stack-based buffer. An attacker can leverage this
vulnerability to execute code in the context of the current process. Was
ZDI-CAN-21768.