What is CVE-2021-47464?

CVE-2021-47464 is a High severity Linux kernel vulnerability with a CVSS score of 7.4 out of 10, classified as a NULL Pointer Dereference flaw (CWE-476). CVE-2021-47464 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

What is the CVSS score for CVE-2021-47464?

CVE-2021-47464 has a CVSS score of 7.4 out of 10, rated High severity. The vector string is CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H.

Is there a patch available for CVE-2021-47464?

No patch is currently available for CVE-2021-47464. Monitor the NIST NVD and your Linux distribution's security advisories for updates.

Is CVE-2021-47464 actively exploited?

CVE-2021-47464 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

What is NULL Pointer Dereference (CWE-476)?

The product dereferences a pointer that it expects to be valid but is NULL, typically causing a crash. See MITRE CWE for full details: https://cwe.mitre.org/data/definitions/476.html

CVE-2021-47464

High

In the Linux kernel, the following vulnerability has been resolved: audit: fix possible null-pointer dereference in audit_filter_rules Fix possible null-pointer dereference in audit_filter_rules. audit_filter_rules() error: we previously assumed 'ctx' could be null

Package Linux Kernel

Published 2024-05-22

Last modified 2025-04-02

CVSS version 3.1

Patch available

Awaiting data

CVSS 3.1 score

7.4

out of 10

High

Attack Vector

Local

Attack Complexity

High

Privileges Required

None

User Interaction

None

Scope

Unchanged

Confidentiality

High

Integrity

High

Availability

High

Vector string

CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H

Weakness type

CWE-476

CVE-2021-47464 is a NULL Pointer Dereference vulnerability

What is NULL Pointer Dereference?

The product dereferences a pointer that it expects to be valid but is NULL, typically causing a crash. Learn more on MITRE CWE

References

The following references provide additional information about CVE-2021-47464 including vendor advisories, patch commits, exploit details, and third-party analysis. Links are sourced from the NIST NVD database.

Kernel patch commit
https://git.kernel.org/stable/c/16802fa4c33eb1a8efb23f1e93365190e4047d05
Patch
Kernel patch commit
https://git.kernel.org/stable/c/4e9e46a700201b4c85081fd478c99c692a9aaa0d
Patch
Kernel patch commit
https://git.kernel.org/stable/c/6e3ee990c90494561921c756481d0e2125d8b895
Patch

4 patch commits total View all on NVD

Details

CVE ID CVE-2021-47464

Severity High

CVSS score 7.4 / 10

CVSS version 3.1

Published 2024-05-22

Modified 2025-04-02

KEV No

Patch Awaiting data

Package linux

Frequently asked questions

What is CVE-2021-47464?

CVE-2021-47464 is a High severity Linux kernel vulnerability with a CVSS score of 7.4 out of 10 , classified as a NULL Pointer Dereference flaw (CWE-476) . CVE-2021-47464 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.
What is the CVSS score for CVE-2021-47464?

CVE-2021-47464 has a CVSS score of 7.4 out of 10, rated High severity (CVSS 3.1). The vector string is CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H.
Is there a patch available for CVE-2021-47464?

No patch is currently available for CVE-2021-47464. Monitor the NIST NVD and your Linux distribution's security advisories for updates.
Is CVE-2021-47464 actively exploited?

No — CVE-2021-47464 has not been confirmed as actively exploited. It is not listed in the CISA Known Exploited Vulnerabilities (KEV) catalog.
What is NULL Pointer Dereference (CWE-476)?

The product dereferences a pointer that it expects to be valid but is NULL, typically causing a crash. View CWE-476 on MITRE CWE →