{"id":"CVE-2021-3543","details":"A flaw null pointer dereference in the Nitro Enclaves kernel driver was found in the way that Enclaves VMs forces closures on the enclave file descriptor. A local user of a host machine could use this flaw to crash the system or escalate their privileges on the system.","modified":"2026-03-14T11:00:42.103324Z","published":"2021-06-01T14:15:10.407Z","related":["ALSA-2021:2168"],"references":[{"type":"WEB","url":"https://lore.kernel.org/lkml/20210429165941.27020-2-andraprs%40amazon.com/"},{"type":"REPORT","url":"https://bugzilla.redhat.com/show_bug.cgi?id=1953022"}],"affected":[{"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2021-3543.json","unresolved_ranges":[{"events":[{"introduced":"0"},{"fixed":"5.10.0"}]},{"events":[{"introduced":"0"},{"last_affected":"8.0"}]},{"events":[{"introduced":"0"},{"last_affected":"34"}]}]}}],"schema_version":"1.7.5","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H"}]}