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CVE-2021-47403

7.1 · HIGH

In the Linux kernel, the following vulnerability has been resolved: ipack: ipoctal: fix module reference leak A reference to the carrier module was taken on every open but was only released once…

Published May 21, 2024CWE-200EPSS 0.25%

Overview

CVE-2021-47403 is a high-severity vulnerability. It was published on May 21, 2024 and has a CVSS 3.1 base score of 7.1 (HIGH).

This vulnerability has a CVSS 3.1 base score of 7.1, rated HIGH. 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:

ipack: ipoctal: fix module reference leak

A reference to the carrier module was taken on every open but was only

released once when the final reference to the tty struct was dropped.

Fix this by taking the module reference and initialising the tty driver

data when installing the tty.

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/31398849b84ebae0d43a1cf379cb9895597f221aRefgit.kernel.org/stable/c/3253c87e1e5bc0107aab773af2f135ebccf38666Refgit.kernel.org/stable/c/7cea848678470daadbfdaa6a112b823c290f900cRefgit.kernel.org/stable/c/811178f296b16af30264def74c8d2179a72d5562Refgit.kernel.org/stable/c/9c5b77a7ffc983b2429ce158b50497c5d3c86a69Refgit.kernel.org/stable/c/bb8a4fcb2136508224c596a7e665bdba1d7c3c27Refgit.kernel.org/stable/c/c0adb5a947dec6cff7050ec56d78ecd3916f9ce6Refgit.kernel.org/stable/c/dde4c1429b97383689f755ce92b4ed1e84a9c92bRefgit.kernel.org/stable/c/31398849b84ebae0d43a1cf379cb9895597f221aRefgit.kernel.org/stable/c/3253c87e1e5bc0107aab773af2f135ebccf38666

How CyberStrike helps

Frequently asked questions

What is CVE-2021-47403?

CVE-2021-47403 is a high-severity vulnerability. It was published on May 21, 2024 and has a CVSS 3.1 base score of 7.1 (HIGH).

How severe is CVE-2021-47403?

This vulnerability has a CVSS 3.1 base score of 7.1, rated HIGH. It requires local or adjacent network access to exploit. Some level of privileges is required for exploitation.

How do I fix or remediate CVE-2021-47403?

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-2021-47403?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2021-47403 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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