Linux Kernel Nitro Enclaves Driver null pointer dereference

CVSS Meta Temp Score
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Current Exploit Price (≈)
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CTI Interest Score
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4.3$0-$5k0.00

Summaryinfo

A vulnerability has been found in Linux Kernel and classified as problematic. This vulnerability affects unknown code of the component Nitro Enclaves Driver. This manipulation causes null pointer dereference. The identification of this vulnerability is CVE-2021-3543. It is possible to initiate the attack remotely. There is no exploit available.

Detailsinfo

A vulnerability has been found in Linux Kernel (Operating System) (the affected version unknown) and classified as problematic. Affected by this vulnerability is an unknown part of the component Nitro Enclaves Driver. The manipulation with an unknown input leads to a null pointer dereference vulnerability. The CWE definition for the vulnerability is CWE-476. A NULL pointer dereference occurs when the application dereferences a pointer that it expects to be valid, but is NULL, typically causing a crash or exit. As an impact it is known to affect availability.

The weakness was shared 06/02/2021. It is possible to read the advisory at bugzilla.redhat.com. This vulnerability is known as CVE-2021-3543. The technical details are unknown and an exploit is not publicly available. The pricing for an exploit might be around USD $0-$5k at the moment (estimation calculated on 08/15/2025).

The vulnerability scanner Nessus provides a plugin with the ID 250254 (Linux Distros Unpatched Vulnerability : CVE-2021-3543), which helps to determine the existence of the flaw in a target environment.

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.

The vulnerability is also documented in the vulnerability database at Tenable (250254). Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.

Productinfo

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Vendor

Name

License

Website

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 4.3
VulDB Meta Temp Score: 4.3

VulDB Base Score: 4.3
VulDB Temp Score: 4.3
VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv2info

AVACAuCIA
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VulDB Base Score: 🔍
VulDB Temp Score: 🔍
VulDB Reliability: 🔍

Exploitinginfo

Class: Null pointer dereference
CWE: CWE-476 / CWE-404
CAPEC: 🔍
ATT&CK: 🔍

Physical: No
Local: No
Remote: Yes

Availability: 🔍
Status: Not defined

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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Nessus ID: 250254
Nessus Name: Linux Distros Unpatched Vulnerability : CVE-2021-3543

Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: no mitigation known
Status: 🔍

0-Day Time: 🔍

Timelineinfo

05/10/2021 🔍
06/02/2021 +23 days 🔍
06/02/2021 +0 days 🔍
08/15/2025 +1535 days 🔍

Sourcesinfo

Vendor: kernel.org

Advisory: bugzilla.redhat.com
Status: Not defined

CVE: CVE-2021-3543 (🔍)
GCVE (CVE): GCVE-0-2021-3543
GCVE (VulDB): GCVE-100-176179

Entryinfo

Created: 06/02/2021 10:55
Updated: 08/15/2025 20:25
Changes: 06/02/2021 10:55 (37), 06/05/2021 08:35 (2), 08/15/2025 20:25 (16)
Complete: 🔍
Cache ID: 216::103

Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.

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