CVE-2021-47035 (GCVE-0-2021-47035)
Vulnerability from cvelistv5
Published
2024-02-28 08:13
Modified
2026-08-05 08:45
Severity ?
8.8 (High) - CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H
Summary
In the Linux kernel, the following vulnerability has been resolved: iommu/vt-d: Remove WO permissions on second-level paging entries When the first level page table is used for IOVA translation, it only supports Read-Only and Read-Write permissions. The Write-Only permission is not supported as the PRESENT bit (implying Read permission) should always set. When using second level, we still give separate permissions that allows WriteOnly which seems inconsistent and awkward. We want to have consistent behavior. After moving to 1st level, we don't want things to work sometimes, and break if we use 2nd level for the same mappings. Hence remove this configuration.
References
Impacted products
Vendor Product Version
Linux Linux Version: b802d070a52a1565b47daaa808872cfbd4a17b01
Version: b802d070a52a1565b47daaa808872cfbd4a17b01
Version: b802d070a52a1565b47daaa808872cfbd4a17b01
Version: b802d070a52a1565b47daaa808872cfbd4a17b01
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