Maintainers for grub-linuxbios are GRUB Maintainers <pkg-grub-devel@alioth-lists.debian.net>.
You may want to refer to the following packages that are part of the same source: grub-common, grub-coreboot, grub-coreboot-bin, grub-coreboot-dbg, grub-efi, grub-efi-amd64, grub-efi-amd64-bin, grub-efi-amd64-dbg, grub-efi-amd64-signed-template, grub-efi-amd64-unsigned, grub-efi-arm, grub-efi-arm-bin, grub-efi-arm-dbg, grub-efi-arm-unsigned, grub-efi-arm64, grub-efi-arm64-bin, grub-efi-arm64-dbg, grub-efi-arm64-signed-template, grub-efi-arm64-unsigned, grub-efi-ia32, grub-efi-ia32-bin, grub-efi-ia32-dbg, grub-efi-ia32-signed-template, grub-efi-ia32-unsigned, grub-efi-riscv64, grub-efi-riscv64-bin, grub-efi-riscv64-dbg, grub-efi-riscv64-unsigned, grub-emu, grub-emu-dbg, grub-firmware-qemu, grub-ieee1275, grub-ieee1275-bin, grub-ieee1275-dbg, grub-pc, grub-pc-bin, grub-pc-dbg, grub-rescue-pc, grub-theme-starfield, grub-uboot, grub-uboot-bin, grub-uboot-dbg, grub-xen, grub-xen-bin, grub-xen-dbg, grub-xen-host, grub-yeeloong, grub-yeeloong-bin, grub-yeeloong-dbg, grub2, grub2-common.
You might like to refer to the grub-linuxbios package page, to the Package Tracking System, or to the source package src:grub2's bug page.
If you find a bug not listed here, please report it.