CVE-2022-3775
High
Description
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.
SeverityHigh
CVSS7.1
Exploit probability—
Product
Gnu Grub2
PublishedDec 19, 2022
First seenDec 19, 2022
Weakness typeCWE-787Out-of-bounds write
How to fix
Vendor advisories
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| gnu grub2 | v ≤ 2.06 | — |
| redhat enterprise_linux | 8.0 | — |
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