CVE-2021-3543

MEDIUM

Nitro Enclaves < 5.10.0 - NULL Pointer Dereference via Enclave File Descriptor Closure

Title source: llm
STIX 2.1

Description

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.

References (2)

Core 2
Core References
Issue Tracking, Third Party Advisory x_refsource_misc
https://bugzilla.redhat.com/show_bug.cgi?id=1953022

Scores

CVSS v3 6.7
EPSS 0.0010
EPSS Percentile 26.7%
Attack Vector LOCAL
CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H

Details

CWE
CWE-476 CWE-416
Status published
Products (3)
fedoraproject/fedora 34
nitro_enclaves_project/nitro_enclaves < 5.10.0
redhat/enterprise_linux 8.0
Published Jun 01, 2021
Tracked Since Feb 18, 2026