What is CVE-2021-47489?

CVE-2021-47489 is a High severity Linux kernel vulnerability with a CVSS score of 7.8 out of 10, classified as a Out-of-bounds Write flaw (CWE-787), affecting Linux kernel versions from 5.10 onward and patched in 5.10.236, 5.14.16 and 5.15. CVE-2021-47489 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

What is the CVSS score for CVE-2021-47489?

CVE-2021-47489 has a CVSS score of 7.8 out of 10, rated High severity. The vector string is CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H.

Is there a patch available for CVE-2021-47489?

Yes, CVE-2021-47489 has been patched. Fixed versions include 5.10.236, 5.14.16 and 5.15. If you are running Linux kernel 5.10 or later up to the fix versions, apply the relevant patch for your kernel branch.

Is CVE-2021-47489 actively exploited?

CVE-2021-47489 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

What is Out-of-bounds Write (CWE-787)?

The product writes data past the end or before the beginning of the intended buffer. See MITRE CWE for full details: https://cwe.mitre.org/data/definitions/787.html

CVE-2021-47489

High

In the Linux kernel, the following vulnerability has been resolved: drm/amdgpu: Fix even more out of bound writes from debugfs CVE-2021-42327 was fixed by: commit f23750b5b3d98653b31d4469592935ef6364ad67 Author: Thelford Williams <[email protected]> Date: Wed Oct 13 16:04:13 2021 -0400 drm/amdgpu: fix out of bounds write but amdgpu_dm_debugfs.c contains more of the same issue so fix the remaining ones. v2: * Add missing fix in dp_max_bpc_write (Harry Wentland)

Package Linux Kernel

Published 2024-05-22

Last modified 2025-11-18

CVSS version 3.1

Patch available

Yes

CVSS 3.1 score

7.8

out of 10

High

Attack Vector

Local

Attack Complexity

Low

Privileges Required

Low

User Interaction

None

Scope

Unchanged

Confidentiality

High

Integrity

High

Availability

High

Vector string

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

Weakness type

CWE-787

CVE-2021-47489 is a Out-of-bounds Write vulnerability

What is Out-of-bounds Write?

The product writes data past the end or before the beginning of the intended buffer. Learn more on MITRE CWE

Affected versions

Linux kernel versions 5.10 and later are affected. Fixed in 5.10.236, 5.14.16, 5.15 and their respective stable series.

Affected from

≥ 5.10

Fixed in

✓ 5.10.236 5.10.x ✓ 5.14.16 5.14.x ✓ 5.15

References

4 total

Kernel Git
https://git.kernel.org/stable/c/1336b886b162fdc84708096ea152a61c0e1fc09c

Patch
Kernel Git
https://git.kernel.org/stable/c/3f4e54bd312d3dafb59daf2b97ffa08abebe60f5

Patch
Kernel Git
https://git.kernel.org/stable/c/9eb4bdd554fc31a5ef6bf645a20ff21618ce45a9

Patch
Debian Security
https://lists.debian.org/debian-lts-announce/2025/05/msg00030.html

Mailing List Third Party Advisory

Details

CVE ID CVE-2021-47489

Severity High

CVSS score 7.8 / 10

CVSS version 3.1

Published 2024-05-22

Modified 2025-11-18

KEV No

Patch

Yes

Package linux

Frequently asked questions

What is CVE-2021-47489?

CVE-2021-47489 is a High severity Linux kernel vulnerability with a CVSS score of 7.8 out of 10 , classified as an Out-of-bounds Write flaw (CWE-787) . It affects Linux kernel versions from 5.10 onward and has been patched in 5.10.236, 5.14.16 and 5.15. CVE-2021-47489 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.
What is the CVSS score for CVE-2021-47489?

CVE-2021-47489 has a CVSS score of 7.8 out of 10, rated High severity (CVSS 3.1). The vector string is CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H.
Is there a patch available for CVE-2021-47489?

Yes. CVE-2021-47489 has been patched. Fixed versions include 5.10.236, 5.14.16 and 5.15. If you are running Linux kernel 5.10 or later up to the fix versions, apply the relevant patch for your kernel branch.
Is CVE-2021-47489 actively exploited?

No. CVE-2021-47489 has not been confirmed as actively exploited. It is not listed in the CISA Known Exploited Vulnerabilities (KEV) catalog.