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CVE-2021-46979

5.5 · MEDIUM

In the Linux kernel, the following vulnerability has been resolved: iio: core: fix ioctl handlers removal Currently ioctl handlers are removed twice.

Published Feb 28, 2024CWE-415EPSS 0.22%

Overview

CVE-2021-46979 is a medium-severity vulnerability. It was published on February 28, 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:

iio: core: fix ioctl handlers removal

Currently ioctl handlers are removed twice. For the first time during

iio_device_unregister() then later on inside

iio_device_unregister_eventset() and iio_buffers_free_sysfs_and_mask().

Double free leads to kernel panic.

Fix this by not touching ioctl handlers list directly but rather

letting code responsible for registration call the matching cleanup

routine itself.

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/11e1cae5da4096552f7c091476cbadbc0d1817daRefgit.kernel.org/stable/c/901f84de0e16bde10a72d7eb2f2eb73fcde8fa1aRefgit.kernel.org/stable/c/ab6c935ba3a04317632f3b8b68675bdbaf395303Refgit.kernel.org/stable/c/11e1cae5da4096552f7c091476cbadbc0d1817daRefgit.kernel.org/stable/c/901f84de0e16bde10a72d7eb2f2eb73fcde8fa1aRefgit.kernel.org/stable/c/ab6c935ba3a04317632f3b8b68675bdbaf395303

How CyberStrike helps

Frequently asked questions

What is CVE-2021-46979?

CVE-2021-46979 is a medium-severity vulnerability. It was published on February 28, 2024 and has a CVSS 3.1 base score of 5.5 (MEDIUM).

How severe is CVE-2021-46979?

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-2021-46979?

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-2021-46979?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2021-46979 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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