It was discovered that FLAC was not properly performing memory management
operations, which could result in a memory leak. An attacker could possibly
use this issue to cause FLAC to consume resources, leading to a denial of
service. (CVE-2017-6888)

It was discovered that FLAC was not properly performing bounds checking
operations when encoding or decoding data. If a user or automated system
were tricked into processing a specially crafted file, an attacker could
possibly use this issue to expose sensitive information or to cause FLAC
to crash, leading to a denial of service. (CVE-2020-0499, CVE-2021-0561)

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