What is CVE-2021-47348?

CVE-2021-47348 is a Critical severity Linux kernel vulnerability with a CVSS score of 9.1 out of 10, classified as a Buffer Overflow flaw (CWE-119), affecting Linux kernel versions from 5.5 onward and patched in 5.10.51, 5.12.18, 5.13.3 and others. CVE-2021-47348 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

What is the CVSS score for CVE-2021-47348?

CVE-2021-47348 has a CVSS score of 9.1 out of 10, rated Critical severity. The vector string is CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H.

Is there a patch available for CVE-2021-47348?

Yes, CVE-2021-47348 has been patched. Fixed versions include 5.10.51, 5.12.18, 5.13.3 and others. If you are running Linux kernel 5.5 or later up to the fix versions, apply the relevant patch for your kernel branch.

Is CVE-2021-47348 actively exploited?

CVE-2021-47348 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

What is Buffer Overflow (CWE-119)?

The product performs operations on a memory buffer but reads or writes outside its intended boundaries. See MITRE CWE for full details: https://cwe.mitre.org/data/definitions/119.html

CVE-2021-47348

Critical

In the Linux kernel, the following vulnerability has been resolved: drm/amd/display: Avoid HDCP over-read and corruption Instead of reading the desired 5 bytes of the actual target field, the code was reading 8. This could result in a corrupted value if the trailing 3 bytes were non-zero, so instead use an appropriately sized and zero-initialized bounce buffer, and read only 5 bytes before casting to u64.

Package Linux Kernel

Published 2024-05-21

Last modified 2025-04-02

CVSS version 3.1

Patch available

Yes

CVSS 3.1 score

9.1

out of 10

Critical

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

None

Scope

Unchanged

Confidentiality

High

Integrity

None

Availability

High

Vector string

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

Weakness type

CWE-119

CVE-2021-47348 is a Buffer Overflow vulnerability

What is Buffer Overflow?

The product performs operations on a memory buffer but reads or writes outside its intended boundaries. Learn more on MITRE CWE

Affected versions

Linux kernel versions 5.5 and later are affected. Fixed in 5.10.51, 5.12.18, 5.13.3, 5.14 and their respective stable series.

Affected from

≥ 5.5

Fixed in

✓ 5.10.51 5.10.x ✓ 5.12.18 5.12.x ✓ 5.13.3 5.13.x ✓ 5.14

References

4 total

Kernel Git
https://git.kernel.org/stable/c/06888d571b513cbfc0b41949948def6cb81021b2

Patch
Kernel Git
https://git.kernel.org/stable/c/3b2b93a485fb7a970bc8b5daef16f4cf579d172f

Patch
Kernel Git
https://git.kernel.org/stable/c/44c7c901cb368a9f2493748f213b247b5872639f

Patch
Kernel Git
https://git.kernel.org/stable/c/c5b518f4b98dbb2bc31b6a55e6aaa1e0e2948f2e

Patch

Details

CVE ID CVE-2021-47348

Severity Critical

CVSS score 9.1 / 10

CVSS version 3.1

Published 2024-05-21

Modified 2025-04-02

KEV No

Patch

Yes

Package linux

Frequently asked questions

What is CVE-2021-47348?

CVE-2021-47348 is a Critical severity Linux kernel vulnerability with a CVSS score of 9.1 out of 10 , classified as a Buffer Overflow flaw (CWE-119) . It affects Linux kernel versions from 5.5 onward and has been patched in 5.10.51, 5.12.18, 5.13.3 and others. CVE-2021-47348 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.
What is the CVSS score for CVE-2021-47348?

CVE-2021-47348 has a CVSS score of 9.1 out of 10, rated Critical severity (CVSS 3.1). The vector string is CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H.
Is there a patch available for CVE-2021-47348?

Yes. CVE-2021-47348 has been patched. Fixed versions include 5.10.51, 5.12.18, 5.13.3 and others. If you are running Linux kernel 5.5 or later up to the fix versions, apply the relevant patch for your kernel branch.
Is CVE-2021-47348 actively exploited?

No. CVE-2021-47348 has not been confirmed as actively exploited. It is not listed in the CISA Known Exploited Vulnerabilities (KEV) catalog.