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CVE-2021-47171

5.5 · MEDIUM

In the Linux kernel, the following vulnerability has been resolved: net: usb: fix memory leak in smsc75xx_bind Syzbot reported memory leak in smsc75xx_bind().

Published Mar 25, 2024CWE-401EPSS 0.24%

Overview

CVE-2021-47171 is a medium-severity vulnerability. It was published on March 25, 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:

net: usb: fix memory leak in smsc75xx_bind

Syzbot reported memory leak in smsc75xx_bind().

The problem was is non-freed memory in case of

errors after memory allocation.

backtrace:

[<ffffffff84245b62>] kmalloc include/linux/slab.h:556 [inline]

[<ffffffff84245b62>] kzalloc include/linux/slab.h:686 [inline]

[<ffffffff84245b62>] smsc75xx_bind+0x7a/0x334 drivers/net/usb/smsc75xx.c:1460

[<ffffffff82b5b2e6>] usbnet_probe+0x3b6/0xc30 drivers/net/usb/usbnet.c:1728

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/200dbfcad8011e50c3cec269ed7b980836eeb1faRefgit.kernel.org/stable/c/22c840596af0c09068b6cf948616e6496e59e07fRefgit.kernel.org/stable/c/46a8b29c6306d8bbfd92b614ef65a47c900d8e70Refgit.kernel.org/stable/c/635ac38b36255d3cfb8312cf7c471334f4d537e0Refgit.kernel.org/stable/c/70c886ac93f87ae7214a0c69151a28a8075dd95bRefgit.kernel.org/stable/c/9e6a3eccb28779710cbbafc4f4258d92509c6d07Refgit.kernel.org/stable/c/9e6b8c1ff9d997e1fa16cbd2d60739adf6dc1bbcRefgit.kernel.org/stable/c/b95fb96e6339e34694dd578fb6bde3575b01af17Refgit.kernel.org/stable/c/200dbfcad8011e50c3cec269ed7b980836eeb1faRefgit.kernel.org/stable/c/22c840596af0c09068b6cf948616e6496e59e07f

How CyberStrike helps

Frequently asked questions

What is CVE-2021-47171?

CVE-2021-47171 is a medium-severity vulnerability. It was published on March 25, 2024 and has a CVSS 3.1 base score of 5.5 (MEDIUM).

How severe is CVE-2021-47171?

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-2021-47171?

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-2021-47171?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2021-47171 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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