What is CVE-2025-21987?

CVE-2025-21987 is a Medium severity Linux kernel vulnerability with a CVSS score of 5.5 out of 10, affecting Linux kernel versions from 6.10 onward and patched in 6.12.18, 6.13.6 and 6.14. CVE-2025-21987 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

What is the CVSS score for CVE-2025-21987?

CVE-2025-21987 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-2025-21987?

Yes, CVE-2025-21987 has been patched. Fixed versions include 6.12.18, 6.13.6 and 6.14. If you are running Linux kernel 6.10 or later up to the fix versions, apply the relevant patch for your kernel branch.

Is CVE-2025-21987 actively exploited?

CVE-2025-21987 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

CVE-2025-21987

Medium

In the Linux kernel, the following vulnerability has been resolved: drm/amdgpu: init return value in amdgpu_ttm_clear_buffer Otherwise an uninitialized value can be returned if amdgpu_res_cleared returns true for all regions. Possibly closes: https://gitlab.freedesktop.org/drm/amd/-/issues/3812 (cherry picked from commit 7c62aacc3b452f73a1284198c81551035fac6d71)

Package Linux Kernel

Published 2025-04-02

Last modified 2025-10-30

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

Weakness type

CWE-908

CVE-2025-21987 is classified as CWE-908

See CWE-908 on MITRE CWE for full details on this weakness type.

Affected versions

Linux kernel versions 6.10 and later are affected. Fixed in 6.12.18, 6.13.6, 6.14 and their respective stable series.

Affected from

≥ 6.10

Fixed in

✓ 6.12.18 6.12.x ✓ 6.13.6 6.13.x ✓ 6.14

References

The following references provide additional information about CVE-2025-21987 including vendor advisories, patch commits, exploit details, and third-party analysis. Links are sourced from the NIST NVD database.

Kernel patch commit
https://git.kernel.org/stable/c/5bd98c2df4a0f2e2dcbdf563feb8d348406377b5
Patch
Kernel patch commit
https://git.kernel.org/stable/c/d2c9625b0ade41f9917875d88173a0cc802b95fc
Patch
Kernel patch commit
https://git.kernel.org/stable/c/d3c7059b6a8600fc62cd863f1ea203b8675e63e1
Patch

Details

CVE ID CVE-2025-21987

Severity Medium

CVSS score 5.5 / 10

CVSS version 3.1

Published 2025-04-02

Modified 2025-10-30

KEV No

Patch

Yes

Package linux

Frequently asked questions

What is CVE-2025-21987?

CVE-2025-21987 is a Medium severity Linux kernel vulnerability with a CVSS score of 5.5 out of 10 . It affects Linux kernel versions from 6.10 onward and has been patched in 6.12.18, 6.13.6 and 6.14. CVE-2025-21987 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.
What is the CVSS score for CVE-2025-21987?

CVE-2025-21987 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-2025-21987?

Yes — CVE-2025-21987 has been patched. Fixed versions include 6.12.18, 6.13.6 and 6.14. If you are running Linux kernel 6.10 or later up to the fix versions, apply the relevant patch for your kernel branch.
Is CVE-2025-21987 actively exploited?

No — CVE-2025-21987 has not been confirmed as actively exploited. It is not listed in the CISA Known Exploited Vulnerabilities (KEV) catalog.