Description
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.
Affected products
Version statuses are supplied by the assigning organization. Consult the original record for detailed ranges and platform conditions.
Linux Linux
Default version status: unaffected
b802d070a52a1565b47daaa808872cfbd4a17b01 to < 89bd620798704a8805fc9db0d71d7f812cf5b3d2affectedb802d070a52a1565b47daaa808872cfbd4a17b01 to < 25faff78138933244c678c7fc78f7c0340fa04a0affectedb802d070a52a1565b47daaa808872cfbd4a17b01 to < 66c24699f266ff310381a9552d3576eea8ad6e20affectedb802d070a52a1565b47daaa808872cfbd4a17b01 to < eea53c5816889ee8b64544fa2e9311a81184ff9caffected
Linux Linux
Default version status: affected
5.6affected0 to < 5.6unaffected5.10.38 to ≤ 5.10.*unaffected5.11.21 to ≤ 5.11.*unaffected5.12.4 to ≤ 5.12.*unaffected5.13 to ≤ *unaffected
References
- 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 ↗
- https://git.kernel.org/stable/c/c848416cc05afc1589edba04fe00b85c2f797ee3 ↗