CVE-2021-46920

Published: Feb 27, 2024

Modified: May 11, 2026

PUBLISHED

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.

Vendor	Product	Versions
Linux	Linux	affected `bfe1d56091c1a404b3d4ce7e9809d745fc4453bb - < a5ad12d5d69c63af289a37f05187a0c6fe93553d` affected `bfe1d56091c1a404b3d4ce7e9809d745fc4453bb - < 02981a44a0e402089775416371bd2e0c935685f8` affected `bfe1d56091c1a404b3d4ce7e9809d745fc4453bb - < ea941ac294d75d0ace50797aebf0056f6f8f7a7f`
Linux	Linux	affected `5.6` unaffected `0 - < 5.6` unaffected `5.10.32 - <= 5.10.` unaffected `5.11.16 - <= 5.11.` unaffected `5.12 - <= *`

References

https://git.kernel.org/stable/c/a5ad12d5d69c63af289a37f05187a0c6fe93553d

https://git.kernel.org/stable/c/02981a44a0e402089775416371bd2e0c935685f8

https://git.kernel.org/stable/c/ea941ac294d75d0ace50797aebf0056f6f8f7a7f

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CVE-2021-46920

Description

Affected Products

References