CVE-2022-3775

CVE Details

Release Date:

2022-12-19

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.

See more information about CVE-2022-3775 from MITRE CVE dictionary and NIST NVD

CVSS v3.0 metrics

NOTE: The following CVSS v3.0 metrics and score provided are preliminary and subject to review.

Base Score:	7.1	Base Metrics:	AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:H
Access Vector:	Local network	Attack Complexity:	Low
Privileges Required:	Low	User Interaction:	None
Scope:	Unchanged	Confidentiality Impact:	None
Integrity Impact:	High	Availability Impact:	High

Errata information

Platform	Errata	Release Date
Oracle Linux version 8 (grub2)	ELSA-2023-0049	2023-01-25
Oracle Linux version 9 (grub2)	ELSA-2023-0752	2023-06-13
Oracle Linux version 9 (grub2)	ELSA-2023-12019	2023-01-12

This page is generated automatically and has not been checked for errors or omissions. For clarification or corrections please contact the Oracle Linux ULN team