When rendering certain unicode sequences, grub2's font code doesn't proper validate if the informed glyph's width and height is constrained within bitmap size. As consequence an attacker can craft an input which will lead to a out-of-bounds write into grub2's heap, leading to memory corruption and availability issues. Although complex, arbitrary code execution could not be discarded.
2022-12-19T20:15:11.427
2024-11-21T07:20:13.247
Modified
CVSSv3.1: 7.1 (HIGH)
| Type | Vendor | Product | Version/Range | Vulnerable? |
|---|---|---|---|---|
| Application | gnu | grub2 | ≤ 2.06 | Yes |
| Operating System | redhat | enterprise_linux | 8.0 | Yes |