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CVE-2021-46911

9.8 · CRITICAL

In the Linux kernel, the following vulnerability has been resolved: ch_ktls: Fix kernel panic Taking page refcount is not ideal and causes kernel panic sometimes.

Published Feb 27, 2024EPSS 0.60%

Overview

CVE-2021-46911 is a critical-severity vulnerability. It was published on February 27, 2024 and has a CVSS 3.1 base score of 9.8 (CRITICAL).

This vulnerability has a CVSS 3.1 base score of 9.8, rated CRITICAL. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.

Technical description

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

ch_ktls: Fix kernel panic

Taking page refcount is not ideal and causes kernel panic

sometimes. It's better to take tx_ctx lock for the complete

skb transmit, to avoid page cleanup if ACK received in middle.

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/1a73e427b824133940c2dd95ebe26b6dce1cbf10Refgit.kernel.org/stable/c/8348665d4181c68b0ca1205b48e1753d78bc810fRefgit.kernel.org/stable/c/8d5a9dbd2116a852f8f0f91f6fbc42a0afe1091fRefgit.kernel.org/stable/c/1a73e427b824133940c2dd95ebe26b6dce1cbf10Refgit.kernel.org/stable/c/8348665d4181c68b0ca1205b48e1753d78bc810fRefgit.kernel.org/stable/c/8d5a9dbd2116a852f8f0f91f6fbc42a0afe1091f

How CyberStrike helps

Frequently asked questions

What is CVE-2021-46911?

CVE-2021-46911 is a critical-severity vulnerability. It was published on February 27, 2024 and has a CVSS 3.1 base score of 9.8 (CRITICAL).

How severe is CVE-2021-46911?

This vulnerability has a CVSS 3.1 base score of 9.8, rated CRITICAL. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.

How do I fix or remediate CVE-2021-46911?

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-2021-46911?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2021-46911 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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