CVE-2021-46920

Summary

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.

Affected Software

VendorProductVersion RangeStatus
LinuxLinuxbfe1d56091c1a404b3d4ce7e9809d745fc4453bb < a5ad12d5d69c63af289a37f05187a0c6fe93553daffected
LinuxLinuxbfe1d56091c1a404b3d4ce7e9809d745fc4453bb < 02981a44a0e402089775416371bd2e0c935685f8affected
LinuxLinuxbfe1d56091c1a404b3d4ce7e9809d745fc4453bb < ea941ac294d75d0ace50797aebf0056f6f8f7a7faffected
LinuxLinux5.6affected
LinuxLinux0 < 5.6unaffected
LinuxLinux5.10.32 <= 5.10.*unaffected
LinuxLinux5.11.16 <= 5.11.*unaffected
LinuxLinux5.12 <= *unaffected

Weaknesses

ADP Enrichment

CISA ADP Vulnrichment

  • SSVC:
  • Exploitation: none
    • Automatable: no
    • Technical Impact: partial

CVE Program Container

Additional References

References