Informazioni sul CVE-2021-47035
iommu/vt-d: Remove WO permissions on second-level paging entries
CWE ID: N/A
Base Score (CVSS): N/A
CVE: CVE-2021-47035
Descrizione: 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.
Vettore di attacco
Punteggio CVSS
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Riferimenti esterni
- https://git.kernel.org/stable/c/89bd620798704a8805fc9db0d71d7f812cf5b3d2
- https://git.kernel.org/stable/c/25faff78138933244c678c7fc78f7c0340fa04a0
- https://git.kernel.org/stable/c/66c24699f266ff310381a9552d3576eea8ad6e20
- https://git.kernel.org/stable/c/eea53c5816889ee8b64544fa2e9311a81184ff9c
Prodotti interessati
- Linux – Linux
- Linux – Linux