CVE-2021-47035

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.

CVSS v3 5.5 MEDIUM

5.5^/10

CVSS v3 : MEDIUM

Vector :

Exploitability : 1.8 / Impact : 3.6

Attack Vector LOCAL

Attack Complexity LOW

Privileges Required LOW

User Interaction NONE

Confidentiality Impact NONE

Integrity Impact NONE

Availability Impact HIGH

Scope UNCHANGED

References

Link	Resource
https://git.kernel.org/stable/c/25faff78138933244c678c7fc78f7c0340fa04a0	Patch
https://git.kernel.org/stable/c/66c24699f266ff310381a9552d3576eea8ad6e20	Patch
https://git.kernel.org/stable/c/89bd620798704a8805fc9db0d71d7f812cf5b3d2	Patch
https://git.kernel.org/stable/c/eea53c5816889ee8b64544fa2e9311a81184ff9c	Patch
https://git.kernel.org/stable/c/25faff78138933244c678c7fc78f7c0340fa04a0	Patch
https://git.kernel.org/stable/c/66c24699f266ff310381a9552d3576eea8ad6e20	Patch
https://git.kernel.org/stable/c/89bd620798704a8805fc9db0d71d7f812cf5b3d2	Patch
https://git.kernel.org/stable/c/c848416cc05afc1589edba04fe00b85c2f797ee3	Patch
https://git.kernel.org/stable/c/eea53c5816889ee8b64544fa2e9311a81184ff9c	Patch

Configurations

Configuration 1 (hide)

OR	cpe:2.3:o:linux:linux_kernel::::::::
	cpe:2.3:o:linux:linux_kernel::::::::
	cpe:2.3:o:linux:linux_kernel::::::::

History

No history.

Information

Published : 2024-02-28 09:15

Updated : 2025-01-24 16:15

NVD link : CVE-2021-47035

Mitre link : CVE-2021-47035

CVE.ORG link : CVE-2021-47035

JSON object : View

Products Affected

linux

linux_kernel

CWE

NVD-CWE-noinfo

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