{"id":"AZL-34785","summary":"CVE-2021-3697 affecting package grub2 for versions less than 2.06-14","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.","modified":"2026-04-01T05:12:40.900687Z","published":"2022-07-06T16:15:08Z","upstream":["CVE-2021-3697"],"references":[{"type":"WEB","url":"https://nvd.nist.gov/vuln/detail/CVE-2021-3697"}],"affected":[{"package":{"name":"grub2","ecosystem":"Azure Linux:3","purl":"pkg:rpm/azure-linux/grub2"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2.06-14"}]}],"database_specific":{"source":"https://github.com/microsoft/AzureLinuxVulnerabilityData/blob/main/osv/AZL-34785.json"}}],"schema_version":"1.7.5","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H"}]}