CLSA-2023-1674815966 grub2: Fix of 2 CVEs

font: Reject glyphs exceeds font-maxglyphwidth or font-maxglyph height - font: Fix size overflow in grubfontgetglyphinternal - CVE-2022-2601: font: Fix several integer overflows in grubfontconstructglyph - CVE-2022-3775: font: Fix an integer underflow in blitcomb...

grub2: Buffer overflow in grub_font_construct_glyph() can lead to out-of-bound write and possible secure boot bypass

A flaw was found where a maliciously crafted pf2 font could lead to an out-of-bounds write in grub2. A successful attack can lead to memory corruption and secure boot circumvention...

grub2: Buffer overflow in grub_font_construct_glyph() can lead to out-of-bound write and possible secure boot bypass

A flaw was found where a maliciously crafted pf2 font could lead to an out-of-bounds write in grub2. A successful attack can lead to memory corruption and secure boot circumvention...