The issue is related to a stack-based buffer overflow in the calculate gain function within the libfaad/sbr hfadj.c component of the Freeware Advanced Audio Decoder 2 (FAAD2). This overflow occurs due to the mishandling of the S M array. A crafted input can lead to a denial of service or potentially other unspecified impacts. Additionally, the vulnerability can be exploited by a remote attacker to access confidential data, compromise its integrity, and cause a denial of service.