CVE-2021-46918: linux kernel — Fix

Description

In the Linux kernel, the following vulnerability has been resolved: dmaengine: idxd: clear MSIX permission entry on shutdown Add disabling/clearing of MSIX permission entries on device shutdown to mirror the enabling of the MSIX entries on probe. Current code left the MSIX enabled and the pasid entries still programmed at device shutdown.

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CVSS v3.1 Score

5.5

MEDIUM

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

Affected Products

Vendor	Product	Versions
linux	linux_kernel	5.11.0 — 5.11.16

References

Advisories & Patches

https://git.kernel.org/stable/c/6df0e6c57dfc064af330071f372f11aa8c584997 https://git.kernel.org/stable/c/c84b8982d7aa9b4717dc36a1c6cbc93ee153b500 https://git.kernel.org/stable/c/6df0e6c57dfc064af330071f372f11aa8c584997 https://git.kernel.org/stable/c/c84b8982d7aa9b4717dc36a1c6cbc93ee153b500

Frequently Asked Questions

What is CVE-2021-46918? +

In the Linux kernel, the following vulnerability has been resolved: dmaengine: idxd: clear MSIX permission entry on shutdown Add disabling/clearing of MSIX permission entries on device shutdown to mirror the enabling of the MSIX entries on probe. Current code left the MSIX enabled and the pasid entries still programmed at device shutdown. It has a CVSS v3.1 base score of 5.5 (MEDIUM).

How severe is CVE-2021-46918? +

CVE-2021-46918 has a CVSS v3.1 score of 5.5 out of 10, rated MEDIUM. This is a medium-severity vulnerability that should be remediated as part of regular maintenance.

What products are affected by CVE-2021-46918? +

CVE-2021-46918 affects products from linux, specifically: linux_kernel. Check the affected products table above for specific version ranges.

How do I check if I'm vulnerable to CVE-2021-46918? +

You can use Secably's free Website Scanner to check your website for known vulnerabilities. For infrastructure scanning, use the Port Scanner to identify exposed services that may be affected. Check the vendor advisories linked above for specific patch and version information.

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CVE-2021-46918