elf.c in the Binary File Descriptor (BFD) library (aka libbfd), as distributed in GNU Binutils 2.29.1, does not validate sizes of core notes, which allows remote attackers to cause a denial of service (bfdgetl32 heap-based buffer over-read and application crash) via a crafted object file, related to elfcoregroknetbsdprocinfo, elfcoregrokopenbsdprocinfo, and elfcoregrokntostatus.