{"id":"AZL-6830","summary":"CVE-2021-3682 affecting package qemu for versions less than 6.2.0-2","details":"A flaw was found in the USB redirector device emulation of QEMU in versions prior to 6.1.0-rc2. It occurs when dropping packets during a bulk transfer from a SPICE client due to the packet queue being full. A malicious SPICE client could use this flaw to make QEMU call free() with faked heap chunk metadata, resulting in a crash of QEMU or potential code execution with the privileges of the QEMU process on the host.","modified":"2026-04-01T05:21:23.770862Z","published":"2021-08-05T20:15:09Z","upstream":["CVE-2021-3682"],"references":[{"type":"WEB","url":"https://nvd.nist.gov/vuln/detail/CVE-2021-3682"}],"affected":[{"package":{"name":"qemu","ecosystem":"Azure Linux:2","purl":"pkg:rpm/azure-linux/qemu"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"6.2.0-2"}]}],"database_specific":{"source":"https://github.com/microsoft/AzureLinuxVulnerabilityData/blob/main/osv/AZL-6830.json"}}],"schema_version":"1.7.5","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:H"}]}