description: A buffer overflow was found in grub_font_construct_glyph(). A malicious crafted pf2 font can lead to an overflow when calculating the max_glyph_size value, allocating a smaller than needed buffer for the glyph, this further leads to a buffer overflow and a heap based out-of-bounds write. An attacker may use this vulnerability to circumvent the secure boot mechanism.
problem types: CWE-122->CWE-787
affected:
{
vendor: n/a
product: grub2
versions:
version: grub2 2.06 and lower, status: affected
}