Bug 2266397 (CVE-2021-46919) - CVE-2021-46919 kernel: wq size store permission state
Summary: CVE-2021-46919 kernel: wq size store permission state
Keywords:
Status: NEW
Alias: CVE-2021-46919
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
medium
medium
Target Milestone: ---
Assignee: Product Security
QA Contact:
URL:
Whiteboard:
Depends On: 2266399
Blocks: 2266369
TreeView+ depends on / blocked
 
Reported: 2024-02-27 18:27 UTC by Rohit Keshri
Modified: 2024-03-26 18:30 UTC (History)
49 users (show)

Fixed In Version:
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Doc Text:
A flaw was found in the Linux Kernel. The WQ size can only be changed when the device is disabled. The current code allows change when the device is enabled but WQ is disabled. Change the check to detect the device state.
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Description Rohit Keshri 2024-02-27 18:27:46 UTC 
In the Linux kernel, the following vulnerability has been resolved:

dmaengine: idxd: fix wq size store permission state

WQ size can only be changed when the device is disabled. Current code
allows change when device is enabled but wq is disabled. Change the check
to detect device state.

https://git.kernel.org/stable/c/05b7791c4c4aa8304368fdc55ae911f6b34e7281
https://git.kernel.org/stable/c/0fff71c5a311e1264988179f7dcc217fda15fadd
https://git.kernel.org/stable/c/4ecf25595273203010bc8318c4aee60ad64037ae
Comment 1 Rohit Keshri 2024-02-27 18:33:48 UTC 
Created kernel tracking bugs for this issue:

Affects: fedora-all [bug 2266399]
Comment 3 Justin M. Forbes 2024-02-27 23:14:17 UTC 
This was fixed for Fedora with the 5.11.16 stable kernel updates.
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