The relocs function in libr/bin/p/bin_bflt.c in radare2 1.2.1 allows remote attackers to cause a denial of service (heap-based buffer overflow and application crash) or possibly have unspecified other impact via a crafted binary file.
https://github.com/radare/radare2/issues/6829
https://github.com/radare/radare2/commit/72794dc3523bbd5bb370de3c5857cb736c387e18