The III_i_stereo function in layer3.c in mpglib as used in libmpgdecoder.a in LAME 3.99.5 and other products allows remote attackers to cause a denial of service (buffer over-read and application crash) via a crafted audio file that is mishandled in the code for the \block_type == 2\ case a similar issue to CVE-2017-11126.