CVE-2022-3775: High severity Microsoft Windows Server 2012 R2 vulnerability
Redhat: CVE-2022-3775 grub2 - Heap based out-of-bounds write when rendering certain Unicode sequences
Other sources
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.
Affected Software
Event History
Frequently Asked Questions
What is CVE-2022-3775?
CVE-2022-3775 is a vulnerability in grub2's font code that allows an attacker to craft input leading to an out-of-bounds write into grub2's heap, leading to memory corruption.
What software is affected by CVE-2022-3775?
The affected software includes grub2-unsigned version 2.06-2ubuntu15, grub2 versions up to 2.06-5, and grub2 versions up to 2.06-2ubuntu14.
How can I fix CVE-2022-3775?
To fix CVE-2022-3775, update the affected software to grub2-unsigned version 2.06-2ubuntu15, grub2 version 2.06-5, or grub2 version 2.06-2ubuntu14.
Where can I find more information about CVE-2022-3775?
You can find more information about CVE-2022-3775 on the MITRE CVE website, the GNU GRUB mailing list, and the NIST National Vulnerability Database (NVD) website.