1. Home
  2. CVE Database
  3. CVE-2022-3775
HIGH · 7.1

CVE-2022-3775

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 ...

Vulnerability 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.

CVSS Score

7.1

HIGH

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:H
Attack Vector
LOCAL
Attack Complexity
LOW
Privileges Required
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
NONE
Integrity
HIGH
Availability
HIGH

Affected Products

VendorProductVersions
GnuGrub2<= 2.06
RedhatEnterprise Linux8.0

Related Weaknesses (CWE)

CWE-787

References

FAQ

What is CVE-2022-3775?

CVE-2022-3775 is a vulnerability with a CVSS score of 7.1 (HIGH). 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 ...

How severe is CVE-2022-3775?

CVE-2022-3775 has been rated HIGH with a CVSS base score of 7.1/10. Review the CVSS metrics above for detailed severity breakdown.

Is there a patch for CVE-2022-3775?

Check the references section above for vendor advisories and patch information. Affected products include: Gnu Grub2, Redhat Enterprise Linux.