An issue was discovered in function filter_frame in libavfilter/vf_lenscorrection.c in Ffmpeg 4.2.1, allows attackers to cause a Denial of Service or other unspecified impacts due to a division by zero.

References

• https://nvd.nist.gov/vuln/detail/CVE-2020-20892
• https://trac.ffmpeg.org/ticket/8265
• http://git.videolan.org/?p=ffmpeg.git;a=commit;h=19587c9332f5be4f6bc6d7b2b8ef3fd21dfeaa01