CVE-2021-3697

CVE Details

Release Date:2022-07-06
Impact:Moderate What is this?

Description


A crafted JPEG image may lead the JPEG reader to underflow its data pointer, allowing user-controlled data to be written in heap. To a successful to be performed the attacker needs to perform some triage over the heap layout and craft an image with a malicious format and payload. This vulnerability can lead to data corruption and eventual code execution or secure boot circumvention. This flaw affects grub2 versions prior grub-2.12.

See more information about CVE-2021-3697 from MITRE CVE dictionary and NIST NVD


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


CVSS v3 metrics

Base Score: 7.5
Vector String: CVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:C/C:H/I:H/A:H
Version: 3.1
Attack Vector: Local
Attack Complexity: High
Privileges Required: High
User Interaction: None
Scope: Changed
Confidentiality Impact: High
Integrity Impact: High
Availability Impact: High

Errata information


PlatformErrataRelease Date
Oracle Linux version 10 (kernel-uek) ELSA-2025-204802025-07-17
Oracle Linux version 10 (kernel-uek) ELSA-2025-205302025-08-18
Oracle Linux version 7 (grub2) ELSA-2022-94692022-06-07
Oracle Linux version 7 (grub2) ELSA-2023-129522023-10-27
Oracle Linux version 8 (grub2) ELSA-2022-50952022-07-04
Oracle Linux version 8 (grub2) ELSA-2022-94712022-06-07
Oracle Linux version 8 (grub2) ELSA-2022-95952022-07-14
Oracle Linux version 9 (grub2) ELSA-2022-50992022-06-30
Oracle Linux version 9 (grub2) ELSA-2022-95962022-07-14
Oracle Linux version 9 (kernel-uek) ELSA-2025-204802025-07-17
Oracle Linux version 9 (kernel-uek) ELSA-2025-205302025-08-18


This page is generated automatically and has not been checked for errors or omissions. For clarification or corrections:

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