A heap-based buffer overflow in the encodeslice function in libavcodec/proresenckostya.c in FFmpeg before 1.1.14 can cause a crash, allowing a malicious image file to cause a denial of service (CVE-2014-5271).
libavcodec/iff.c in FFmpeg before 1.1.14 allows an attacker to have an unspecified impact via a crafted iff image, which triggers an out-of-bounds array access, related to the rgb8 and rgbn formats (CVE-2014-5272).