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CVE-2021-47382

4.7 · MEDIUM

In the Linux kernel, the following vulnerability has been resolved: s390/qeth: fix deadlock during failing recovery Commit 0b9902c1fcc5 ("s390/qeth: fix deadlock during recovery") removed taking…

Published May 21, 2024CWE-362EPSS 0.15%

Overview

CVE-2021-47382 is a medium-severity vulnerability. It was published on May 21, 2024 and has a CVSS 3.1 base score of 4.7 (MEDIUM).

This vulnerability has a CVSS 3.1 base score of 4.7, 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:

s390/qeth: fix deadlock during failing recovery

Commit 0b9902c1fcc5 ("s390/qeth: fix deadlock during recovery") removed

taking discipline_mutex inside qeth_do_reset(), fixing potential

deadlocks. An error path was missed though, that still takes

discipline_mutex and thus has the original deadlock potential.

Intermittent deadlocks were seen when a qeth channel path is configured

offline, causing a race between qeth_do_reset and ccwgroup_remove.

Call qeth_set_offline() directly in the qeth_do_reset() error case and

then a new variant of ccwgroup_set_offline(), without taking

discipline_mutex.

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/0bfe741741327822d1482c7edef0184636d08b40Refgit.kernel.org/stable/c/d2b59bd4b06d84a4eadb520b0f71c62fe8ec0a62Refgit.kernel.org/stable/c/0bfe741741327822d1482c7edef0184636d08b40Refgit.kernel.org/stable/c/d2b59bd4b06d84a4eadb520b0f71c62fe8ec0a62

How CyberStrike helps

Frequently asked questions

What is CVE-2021-47382?

CVE-2021-47382 is a medium-severity vulnerability. It was published on May 21, 2024 and has a CVSS 3.1 base score of 4.7 (MEDIUM).

How severe is CVE-2021-47382?

This vulnerability has a CVSS 3.1 base score of 4.7, 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-2021-47382?

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-2021-47382?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2021-47382 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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