CVE-2021-3543

kernel: nitro_enclaves stale file descriptors on failed usercopy

Published Jun 1, 2021 CVSS 3.1 · 6.7 Medium EPSS < 1% KEV · Not listed
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.

Remediation

No solution or workaround provided in the CVE record

Tracking

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Advisories

Source ID Title
EUVD EUVD EUVD-2021-26854 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.
Ubuntu USN Ubuntu USN USN-4997-1 Linux kernel vulnerabilities
Ubuntu USN Ubuntu USN USN-4997-2 Linux kernel (KVM) vulnerabilities
Ubuntu USN Ubuntu USN USN-5001-1 Linux kernel (OEM) vulnerabilities
History

No history.

Weaknesses

Sources

Status
PUBLISHED
Assigner
redhat
Published
Updated
Aug 3, 2024, 5:01 PM
Reserved
May 10, 2021, 12:00 AM
Status
Modified
Published
Jun 1, 2021, 2:15 PM
Modified
Jun 17, 2026, 4:05 AM
Severity
Moderate
Public date
Apr 29, 2021, 12:00 AM