CVE-2021-3543
MEDIUM
6.7
CVSS Score
Published: June 1, 2021 at 01:20 PM UTC
Updated: June 17, 2026 at 04:05 AM UTC
4 products affected across 3 vendorsFedoraEnterprise LinuxNitro Enclaves
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Severity
MEDIUM6.7
Exploit prediction
EPSS 0.3%
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.
Affected
Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.
95%
v < 5.10.0
Affected range stops below 5.10.0, so it looks safe — our inference, not a vendor statement
Remediation
No guide yetNo remediation guidance has been written for this CVE yet, and no fixed version or vendor advisory is recorded against it.
References (2)
x_refsource_MISCIssue TrackingThird Party Advisory
Source: [email protected]
https://bugzilla.redhat.com/show_bug.cgi?id=1953022x_refsource_MISC
Source: [email protected]
https://lore.kernel.org/lkml/20210429165941.27020-2-andraprs%40amazon.com/CVSS
- Attack Vector
- LOCAL
- Complexity
- LOW
- Privileges
- HIGH
- User Interaction
- NONE
- Scope
- UNCHANGED
- Confidentiality
- HIGH
- Integrity
- HIGH
- Availability
- HIGH
Vector?
Quick Info
StatusMODIFIED
CWE
CWE-416
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