CVE-2022-3775
low-risk
Published 2022-12-19
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.
Do I need to act?
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0.08% chance of exploitation
EPSS score — low exploit probability
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Not on CISA KEV list
No confirmed active exploitation reported to CISA
?
Patch status unknown
Check vendor advisories for fix availability and mitigation guidance
7
CVSS 7.1/10
High
LOCAL
/ LOW complexity
Affected Products (2)
References (4)
29
/ 100
low-risk
Severity
22/34 · High
Exploitability
0/34 · Minimal
Exposure
7/34 · Low