The in_mkv plugin in Winamp before 5.6 allows remote attackers to cause a denial of service (application crash) via a Matroska Video (MKV) file containing a string with a crafted length.

Multiple integer overflows in in_nsv.dll in the in_nsv plugin in Winamp before 5.6 allow remote attackers to execute arbitrary code via a crafted Table of Contents (TOC) in a (1) NSV stream or (2) NSV file that triggers a heap-based buffer overflow.