What is CVE-2025-21985?

CVE-2025-21985 is a High severity Linux kernel vulnerability with a CVSS score of 7.1 out of 10, classified as a Out-of-bounds Read flaw (CWE-125), affecting Linux kernel versions from 4.15 onward and patched in 6.12.20, 6.13.8 and 6.14. CVE-2025-21985 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

What is the CVSS score for CVE-2025-21985?

CVE-2025-21985 has a CVSS score of 7.1 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:N/A:H.

Is there a patch available for CVE-2025-21985?

Yes, CVE-2025-21985 has been patched. Fixed versions include 6.12.20, 6.13.8 and 6.14. If you are running Linux kernel 4.15 or later up to the fix versions, apply the relevant patch for your kernel branch.

Is CVE-2025-21985 actively exploited?

CVE-2025-21985 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

What is Out-of-bounds Read (CWE-125)?

The product reads data past the end or before the beginning of the intended buffer. See MITRE CWE for full details: https://cwe.mitre.org/data/definitions/125.html

CVE-2025-21985

High

In the Linux kernel, the following vulnerability has been resolved: drm/amd/display: Fix out-of-bound accesses [WHAT & HOW] hpo_stream_to_link_encoder_mapping has size MAX_HPO_DP2_ENCODERS(=4), but location can have size up to 6. As a result, it is necessary to check location against MAX_HPO_DP2_ENCODERS. Similiarly, disp_cfg_stream_location can be used as an array index which should be 0..5, so the ASSERT's conditions should be less without equal.

Package Linux Kernel

Published 2025-04-01

Last modified 2025-10-30

CVSS version 3.1

Patch available

Yes

CVSS 3.1 score

7.1

out of 10

High

Attack Vector

Local

Attack Complexity

Low

Privileges Required

Low

User Interaction

None

Scope

Unchanged

Confidentiality

High

Integrity

None

Availability

High

Vector string

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

Weakness type

CWE-125

CVE-2025-21985 is a Out-of-bounds Read vulnerability

What is Out-of-bounds Read?

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

Affected versions

Linux kernel versions 4.15 and later are affected. Fixed in 6.12.20, 6.13.8, 6.14 and their respective stable series.

Affected from

≥ 4.15

Fixed in

✓ 6.12.20 6.12.x ✓ 6.13.8 6.13.x ✓ 6.14

References

The following references provide additional information about CVE-2025-21985 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/36793d90d76f667d26c6dd025571481ee0c96abc
Patch
Kernel patch commit
https://git.kernel.org/stable/c/8adbb2a98b00926315fd513b5fe2596b5716b82d
Patch
Kernel patch commit
https://git.kernel.org/stable/c/9aedc776b11038f04f4641241bb7e877781e4aa4
Patch

Details

CVE ID CVE-2025-21985

Severity High

CVSS score 7.1 / 10

CVSS version 3.1

Published 2025-04-01

Modified 2025-10-30

KEV No

Patch

Yes

Package linux

Frequently asked questions

What is CVE-2025-21985?

CVE-2025-21985 is a High severity Linux kernel vulnerability with a CVSS score of 7.1 out of 10 , classified as an Out-of-bounds Read flaw (CWE-125) . It affects Linux kernel versions from 4.15 onward and has been patched in 6.12.20, 6.13.8 and 6.14. CVE-2025-21985 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.
What is the CVSS score for CVE-2025-21985?

CVE-2025-21985 has a CVSS score of 7.1 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:N/A:H.
Is there a patch available for CVE-2025-21985?

Yes — CVE-2025-21985 has been patched. Fixed versions include 6.12.20, 6.13.8 and 6.14. If you are running Linux kernel 4.15 or later up to the fix versions, apply the relevant patch for your kernel branch.
Is CVE-2025-21985 actively exploited?

No — CVE-2025-21985 has not been confirmed as actively exploited. It is not listed in the CISA Known Exploited Vulnerabilities (KEV) catalog.
What is Out-of-bounds Read (CWE-125)?

The product reads data past the end or before the beginning of the intended buffer. View CWE-125 on MITRE CWE →