CVE-2021-3697

HighCVSS 7.0/10Last modified Jun 17, 2026

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.

Metrics

CVSS 3.1 7.0/10CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H

Weakness enumeration

CWE-787

Affected software

Vendor	Product	Versions
n/a	grub2	grub-2.06

References

https://bugzilla.redhat.com/show_bug.cgi?id=1991687Issue Tracking, Third Party Advisory
https://security.gentoo.org/glsa/202209-12Third Party Advisory
https://security.netapp.com/advisory/ntap-20220930-0001/Third Party Advisory
https://bugzilla.redhat.com/show_bug.cgi?id=1991687Issue Tracking, Third Party Advisory
https://security.gentoo.org/glsa/202209-12Third Party Advisory
https://security.netapp.com/advisory/ntap-20220930-0001/Third Party Advisory

Timeline

Published: Jul 6, 2022
Last modified: Jun 17, 2026
NVD status: Modified

Related CVEs from 2021

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