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THREATINT
PUBLISHED

CVE-2021-46920

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



AssignerLinux
Reserved2024-02-25
Published2024-02-27
Updated2024-10-29

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.

Product status

Default status
unaffected

bfe1d56091c1 before a5ad12d5d69c
affected

bfe1d56091c1 before 02981a44a0e4
affected

bfe1d56091c1 before ea941ac294d7
affected

Default status
affected

5.6
affected

Any version before 5.6
unaffected

5.10.32
unaffected

5.11.16
unaffected

5.12
unaffected

References

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

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

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

cve.org CVE-2021-46920

nvd.nist.gov CVE-2021-46920

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