What is CVE-2021-47035?

CVE-2021-47035 is a Medium severity Linux kernel vulnerability with a CVSS score of 5.5 out of 10, affecting Linux kernel versions from 5.6 onward and patched in 5.10.38, 5.11.21, 5.12.4 and others. CVE-2021-47035 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

What is the CVSS score for CVE-2021-47035?

CVE-2021-47035 has a CVSS score of 5.5 out of 10, rated Medium severity. The vector string is CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H.

Is there a patch available for CVE-2021-47035?

Yes, CVE-2021-47035 has been patched. Fixed versions include 5.10.38, 5.11.21, 5.12.4 and others. If you are running Linux kernel 5.6 or later up to the fix versions, apply the relevant patch for your kernel branch.

Is CVE-2021-47035 actively exploited?

CVE-2021-47035 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

CVE-2021-47035

Medium

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.

Package Linux Kernel

Published 2024-02-28

Last modified 2025-01-24

CVSS version 3.1

Patch available

Yes

CVSS 3.1 score

5.5

out of 10

Medium

Attack Vector

Local

Attack Complexity

Low

Privileges Required

Low

User Interaction

None

Scope

Unchanged

Confidentiality

Low

Integrity

None

Availability

High

Vector string

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

Affected versions

Linux kernel versions 5.6 and later are affected. Fixed in 5.10.38, 5.11.21, 5.12.4, 5.13 and their respective stable series.

Affected from

≥ 5.6

Fixed in

✓ 5.10.38 5.10.x ✓ 5.11.21 5.11.x ✓ 5.12.4 5.12.x ✓ 5.13

References

5 total

Kernel Git
https://git.kernel.org/stable/c/25faff78138933244c678c7fc78f7c0340fa04a0

Patch
Kernel Git
https://git.kernel.org/stable/c/66c24699f266ff310381a9552d3576eea8ad6e20

Patch
Kernel Git
https://git.kernel.org/stable/c/89bd620798704a8805fc9db0d71d7f812cf5b3d2

Patch
Kernel Git
https://git.kernel.org/stable/c/eea53c5816889ee8b64544fa2e9311a81184ff9c

Patch
Kernel Git
https://git.kernel.org/stable/c/c848416cc05afc1589edba04fe00b85c2f797ee3

Patch

Details

CVE ID CVE-2021-47035

Severity Medium

CVSS score 5.5 / 10

CVSS version 3.1

Published 2024-02-28

Modified 2025-01-24

KEV No

Patch

Yes

Package linux

Frequently asked questions

What is CVE-2021-47035?

CVE-2021-47035 is a Medium severity Linux kernel vulnerability with a CVSS score of 5.5 out of 10 . It affects Linux kernel versions from 5.6 onward and has been patched in 5.10.38, 5.11.21, 5.12.4 and others. CVE-2021-47035 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.
What is the CVSS score for CVE-2021-47035?

CVE-2021-47035 has a CVSS score of 5.5 out of 10, rated Medium severity (CVSS 3.1). The vector string is CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H.
Is there a patch available for CVE-2021-47035?

Yes. CVE-2021-47035 has been patched. Fixed versions include 5.10.38, 5.11.21, 5.12.4 and others. If you are running Linux kernel 5.6 or later up to the fix versions, apply the relevant patch for your kernel branch.
Is CVE-2021-47035 actively exploited?

No. CVE-2021-47035 has not been confirmed as actively exploited. It is not listed in the CISA Known Exploited Vulnerabilities (KEV) catalog.