CVE-2021-3696

MediumCVSS 4.5/10Last modified Jun 17, 2026

Description

A heap out-of-bounds write may heppen during the handling of Huffman tables in the PNG reader. This may lead to data corruption in the heap space. Confidentiality, Integrity and Availablity impact may be considered Low as it's very complex to an attacker control the encoding and positioning of corrupted Huffman entries to achieve results such as arbitrary code execution and/or secure boot circumvention. This flaw affects grub2 versions prior grub-2.12.

Metrics

CVSS 3.1 4.5/10CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:L/I:L/A:L

Weakness enumeration

CWE-787

Affected software

No affected versions have been published.

Timeline

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

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CVE-2021-3696: Medium severity, CVSS 4.5 | Vulnix