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CVE-2021-46969

7.8 · HIGH

In the Linux kernel, the following vulnerability has been resolved: bus: mhi: core: Fix invalid error returning in mhi_queue mhi_queue returns an error when the doorbell is not accessible in the…

Published Feb 27, 2024CWE-416EPSS 0.22%

Overview

CVE-2021-46969 is a high-severity vulnerability. It was published on February 27, 2024 and has a CVSS 3.1 base score of 7.8 (HIGH).

This vulnerability has a CVSS 3.1 base score of 7.8, 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:

bus: mhi: core: Fix invalid error returning in mhi_queue

mhi_queue returns an error when the doorbell is not accessible in

the current state. This can happen when the device is in non M0

state, like M3, and needs to be waken-up prior ringing the DB. This

case is managed earlier by triggering an asynchronous M3 exit via

controller resume/suspend callbacks, that in turn will cause M0

transition and DB update.

So, since it's not an error but just delaying of doorbell update, there

is no reason to return an error.

This also fixes a use after free error for skb case, indeed a caller

queuing skb will try to free the skb if the queueing fails, but in

that case queueing has been done.

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/0ecc1c70dcd32c0f081b173a1a5d89952686f271Refgit.kernel.org/stable/c/a99b661c3187365f81026d89b1133a76cd2652b3Refgit.kernel.org/stable/c/0ecc1c70dcd32c0f081b173a1a5d89952686f271Refgit.kernel.org/stable/c/a99b661c3187365f81026d89b1133a76cd2652b3

How CyberStrike helps

Frequently asked questions

What is CVE-2021-46969?

CVE-2021-46969 is a high-severity vulnerability. It was published on February 27, 2024 and has a CVSS 3.1 base score of 7.8 (HIGH).

How severe is CVE-2021-46969?

This vulnerability has a CVSS 3.1 base score of 7.8, 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-2021-46969?

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-2021-46969?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2021-46969 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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