CVE-2021-3697
- Source
- https://nvd.nist.gov/vuln/detail/CVE-2021-3697
- Import Source
- https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2021-3697.json
- JSON Data
- https://api.osv.dev/v1/vulns/CVE-2021-3697
- Downstream
- Related
- Published
- 2022-07-06T16:15:08Z
- Modified
- 2025-08-09T19:01:27Z
- Severity
-
- 7.0 (High) CVSS_V3 - CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H CVSS Calculator
- Summary
- [none]
- Details
-
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.
- References