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CVE-2021-47002

5.5 · MEDIUM

In the Linux kernel, the following vulnerability has been resolved: SUNRPC: Fix null pointer dereference in svc_rqst_free() When alloc_pages_node() returns null in svc_rqst_alloc(), the null rq_s…

Published Feb 28, 2024CWE-476EPSS 0.24%

Overview

CVE-2021-47002 is a medium-severity vulnerability. It was published on February 28, 2024 and has a CVSS 3.1 base score of 5.5 (MEDIUM).

This vulnerability has a CVSS 3.1 base score of 5.5, rated MEDIUM. It requires local or adjacent network access to exploit. Some level of privileges is required for exploitation.

Technical description

In the Linux kernel, the following vulnerability has been resolved:

SUNRPC: Fix null pointer dereference in svc_rqst_free()

When alloc_pages_node() returns null in svc_rqst_alloc(), the

null rq_scratch_page pointer will be dereferenced when calling

put_page() in svc_rqst_free(). Fix it by adding a null check.

Addresses-Coverity: ("Dereference after null check")

Remediation

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

References

Refgit.kernel.org/stable/c/1e10f58f1c9a6b667b045513c7a4e6111c24fe7cRefgit.kernel.org/stable/c/3de81c1e84bf84803308da3272a829a7655c5336Refgit.kernel.org/stable/c/b9f83ffaa0c096b4c832a43964fe6bff3acffe10Refgit.kernel.org/stable/c/c664aaec9aee544538a78ba4893a44bc73a6d742Refgit.kernel.org/stable/c/1e10f58f1c9a6b667b045513c7a4e6111c24fe7cRefgit.kernel.org/stable/c/3de81c1e84bf84803308da3272a829a7655c5336Refgit.kernel.org/stable/c/b9f83ffaa0c096b4c832a43964fe6bff3acffe10Refgit.kernel.org/stable/c/c664aaec9aee544538a78ba4893a44bc73a6d742Refcert-portal.siemens.com/productcert/html/ssa-265688.html

How CyberStrike helps

Frequently asked questions

What is CVE-2021-47002?

CVE-2021-47002 is a medium-severity vulnerability. It was published on February 28, 2024 and has a CVSS 3.1 base score of 5.5 (MEDIUM).

How severe is CVE-2021-47002?

This vulnerability has a CVSS 3.1 base score of 5.5, rated MEDIUM. It requires local or adjacent network access to exploit. Some level of privileges is required for exploitation.

How do I fix or remediate CVE-2021-47002?

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

How can CyberStrike help with CVE-2021-47002?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2021-47002 is actually reachable in your own applications and APIs, then verifies each finding before reporting it. That tells you if the weakness is a real, exploitable risk in your environment or a false positive you can safely deprioritize.

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