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CVE-2021-47498

5.5 · MEDIUM

In the Linux kernel, the following vulnerability has been resolved: dm rq: don't queue request to blk-mq during DM suspend DM uses blk-mq's quiesce/unquiesce to stop/start device mapper queue.

Published May 22, 2024EPSS 0.21%

Overview

CVE-2021-47498 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:

dm rq: don't queue request to blk-mq during DM suspend

DM uses blk-mq's quiesce/unquiesce to stop/start device mapper queue.

But blk-mq's unquiesce may come from outside events, such as elevator

switch, updating nr_requests or others, and request may come during

suspend, so simply ask for blk-mq to requeue it.

Fixes one kernel panic issue when running updating nr_requests and

dm-mpath suspend/resume stress test.

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/8050652810bf38241edec8717393d2446e8036f1Refgit.kernel.org/stable/c/8ca9745efe3528feb06ca4e117188038eea2d351Refgit.kernel.org/stable/c/b4459b11e84092658fa195a2587aff3b9637f0e7Refgit.kernel.org/stable/c/8ca9745efe3528feb06ca4e117188038eea2d351Refgit.kernel.org/stable/c/b4459b11e84092658fa195a2587aff3b9637f0e7Reflists.debian.org/debian-lts-announce/2025/10/msg00007.html

How CyberStrike helps

Frequently asked questions

What is CVE-2021-47498?

CVE-2021-47498 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-2021-47498?

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-2021-47498?

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-2021-47498?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2021-47498 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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