CVE-2021-47498

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

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.

5.5

CVSS

Severity: Medium

CVSS 3.1 •

EPSS 0.05%

Affected: Linux Linux

References

Link	Tags
https://git.kernel.org/stable/c/8ca9745efe3528feb06ca4e117188038eea2d351	patch
https://git.kernel.org/stable/c/b4459b11e84092658fa195a2587aff3b9637f0e7	patch

Frequently Asked Questions

What is the severity of CVE-2021-47498?: CVE-2021-47498 has been scored as a medium severity vulnerability.
How to fix CVE-2021-47498?: To fix CVE-2021-47498, make sure you are using an up-to-date version of the affected component(s) by checking the vendor release notes. As for now, there are no other specific guidelines available.
Is CVE-2021-47498 being actively exploited in the wild?: As for now, there are no information to confirm that CVE-2021-47498 is being actively exploited. According to its EPSS score, there is a ~0% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
What software or system is affected by CVE-2021-47498?: CVE-2021-47498 affects Linux Linux, Linux Linux.

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