CVE-2021-46920

dmaengine: idxd: Fix clobbering of SWERR overflow bit on writeback

Description

In the Linux kernel, the following vulnerability has been resolved: dmaengine: idxd: Fix clobbering of SWERR overflow bit on writeback Current code blindly writes over the SWERR and the OVERFLOW bits. Write back the bits actually read instead so the driver avoids clobbering the OVERFLOW bit that comes after the register is read.

5.5

CVSS

Severity: Medium

CVSS 3.1 •

EPSS 0.02%

Affected: Linux Linux

References

Link	Tags
https://git.kernel.org/stable/c/a5ad12d5d69c63af289a37f05187a0c6fe93553d	patch
https://git.kernel.org/stable/c/02981a44a0e402089775416371bd2e0c935685f8	patch
https://git.kernel.org/stable/c/ea941ac294d75d0ace50797aebf0056f6f8f7a7f	patch

Frequently Asked Questions

What is the severity of CVE-2021-46920?: CVE-2021-46920 has been scored as a medium severity vulnerability.
How to fix CVE-2021-46920?: To fix CVE-2021-46920, 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-2021-46920 being actively exploited in the wild?: As for now, there are no information to confirm that CVE-2021-46920 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-2021-46920?: CVE-2021-46920 affects Linux Linux, Linux Linux.

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