The grub_ext2_read_block function in fs/ext2.c in GNU GRUB before 2013-11-12, as used in shlr/grub/fs/ext2.c in radare2 1.5.0, allows remote attackers to cause a denial of service (excessive stack use and application crash) via a crafted binary file, related to use of a variable-size stack array.
https://github.com/radare/radare2/issues/7723
https://github.com/radare/radare2/commit/65000a7fd9eea62359e6d6714f17b94a99a82edd