Bug 2266373 (CVE-2021-46918) - CVE-2021-46918 kernel: MSIX permission entry on shutdown
Summary: CVE-2021-46918 kernel: MSIX permission entry on shutdown
Keywords:
Status: NEW
Alias: CVE-2021-46918
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
low
low
Target Milestone: ---
Assignee: Product Security
QA Contact:
URL:
Whiteboard:
Depends On: 2266380
Blocks: 2266369
TreeView+ depends on / blocked
 
Reported: 2024-02-27 17:37 UTC by Rohit Keshri
Modified: 2024-03-26 18:29 UTC (History)
49 users (show)

Fixed In Version:
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A flaw was found in the Linux Kernel. The current code leaves the MSIX enabled and the pasid entries still programmed at device shutdown. Add disabling/clearing of MSIX permission entries on device shutdown to mirror the enabling of the MSIX entries on probe.
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Description Rohit Keshri 2024-02-27 17:37:04 UTC 
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.

https://git.kernel.org/stable/c/6df0e6c57dfc064af330071f372f11aa8c584997
https://git.kernel.org/stable/c/c84b8982d7aa9b4717dc36a1c6cbc93ee153b500
Comment 1 Rohit Keshri 2024-02-27 17:48:53 UTC 
Created kernel tracking bugs for this issue:

Affects: fedora-all [bug 2266380]
Comment 3 Justin M. Forbes 2024-02-27 18:25:50 UTC 
This was fixed for Fedora with the 5.11.16 stable kernel update.
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