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CVE-2021-47453

5.5 · MEDIUM

In the Linux kernel, the following vulnerability has been resolved: ice: Avoid crash from unnecessary IDA free In the remove path, there is an attempt to free the aux_idx IDA whether it was alloc…

Published May 22, 2024CWE-401EPSS 0.20%

Overview

CVE-2021-47453 is a medium-severity vulnerability. It was published on May 22, 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:

ice: Avoid crash from unnecessary IDA free

In the remove path, there is an attempt to free the aux_idx IDA whether

it was allocated or not. This can potentially cause a crash when

unloading the driver on systems that do not initialize support for RDMA.

But, this free cannot be gated by the status bit for RDMA, since it is

allocated if the driver detects support for RDMA at probe time, but the

driver can enter into a state where RDMA is not supported after the IDA

has been allocated at probe time and this would lead to a memory leak.

Initialize aux_idx to an invalid value and check for a valid value when

unloading to determine if an IDA free is necessary.

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/73e30a62b19b9fbb4e6a3465c59da186630d5f2eRefgit.kernel.org/stable/c/777682e59840e24e6c5672197e6ffbcf4bff823bRefgit.kernel.org/stable/c/73e30a62b19b9fbb4e6a3465c59da186630d5f2eRefgit.kernel.org/stable/c/777682e59840e24e6c5672197e6ffbcf4bff823b

How CyberStrike helps

Frequently asked questions

What is CVE-2021-47453?

CVE-2021-47453 is a medium-severity vulnerability. It was published on May 22, 2024 and has a CVSS 3.1 base score of 5.5 (MEDIUM).

How severe is CVE-2021-47453?

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-2021-47453?

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-2021-47453?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2021-47453 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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