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CVE-2021-47017

8.8 · HIGH

In the Linux kernel, the following vulnerability has been resolved: ath10k: Fix a use after free in ath10k_htc_send_bundle In ath10k_htc_send_bundle, the bundle_skb could be freed by dev_kfree_sk…

Published Feb 28, 2024CWE-416EPSS 0.34%

Overview

CVE-2021-47017 is a high-severity vulnerability. It was published on February 28, 2024 and has a CVSS 3.1 base score of 8.8 (HIGH).

This vulnerability has a CVSS 3.1 base score of 8.8, rated HIGH. It requires local or adjacent network access to exploit. No authentication or special privileges are required for exploitation.

Technical description

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

ath10k: Fix a use after free in ath10k_htc_send_bundle

In ath10k_htc_send_bundle, the bundle_skb could be freed by

dev_kfree_skb_any(bundle_skb). But the bundle_skb is used later

by bundle_skb->len.

As skb_len = bundle_skb->len, my patch replaces bundle_skb->len to

skb_len after the bundle_skb was freed.

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/3b1ac40c6012140828caa79e592a438a18ebf71bRefgit.kernel.org/stable/c/5e413c0831ff4700d1739db3fa3ae9f859744676Refgit.kernel.org/stable/c/8392df5d7e0b6a7d21440da1fc259f9938f4dec3Refgit.kernel.org/stable/c/8bb054fb336f4250002fff4e0b075221c05c3c65Refgit.kernel.org/stable/c/3b1ac40c6012140828caa79e592a438a18ebf71bRefgit.kernel.org/stable/c/5e413c0831ff4700d1739db3fa3ae9f859744676Refgit.kernel.org/stable/c/8392df5d7e0b6a7d21440da1fc259f9938f4dec3Refgit.kernel.org/stable/c/8bb054fb336f4250002fff4e0b075221c05c3c65

How CyberStrike helps

Frequently asked questions

What is CVE-2021-47017?

CVE-2021-47017 is a high-severity vulnerability. It was published on February 28, 2024 and has a CVSS 3.1 base score of 8.8 (HIGH).

How severe is CVE-2021-47017?

This vulnerability has a CVSS 3.1 base score of 8.8, rated HIGH. It requires local or adjacent network access to exploit. No authentication or special privileges are required for exploitation.

How do I fix or remediate CVE-2021-47017?

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-2021-47017?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2021-47017 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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