Is CVE-2025-21989 in the CISA KEV catalog?

No. CVE-2025-21989 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the CVSS severity of CVE-2025-21989?

CVE-2025-21989 has a CVSS v3 base score of 5.5 (MEDIUM).

What is the EPSS score for CVE-2025-21989?

CVE-2025-21989 has an EPSS score of 0.17% (7th percentile), estimating the probability of exploitation in the next 30 days.

How do I fix CVE-2025-21989?

Upgrade linux on debian 13 to 6.12.20-1 or later. Fixes are available for 30 affected products.

CVE & CISA-KEV Catalog

CVE-2025-21989

MEDIUM

5.5

CVSS v3

NVD

Description

In the Linux kernel, the following vulnerability has been resolved: drm/amd/display: fix missing .is_two_pixels_per_container Starting from 6.11, AMDGPU driver, while being loaded with amdgpu.dc=1, due to lack of .is_two_pixels_per_container function in dce60_tg_funcs, causes a NULL pointer dereference on PCs with old GPUs, such as R9 280X. So this fix adds missing .is_two_pixels_per_container to dce60_tg_funcs. (cherry picked from commit bd4b125eb949785c6f8a53b0494e32795421209d)

CWE-476NULL Pointer Dereference

How to fix

Remediation Available

linuxDebian

Fixed in:6.12.20-1CVE-2025-21989

linux-azure-6.11Ubuntu

Fixed in:6.11.0-1018.18~24.04.1USN-7628-1

linux-gcp-6.11Ubuntu

Fixed in:6.11.0-1016.16~24.04.1USN-7605-1

linux-hwe-6.11Ubuntu

Fixed in:6.11.0-28.28~24.04.1USN-7605-1

linux-image-6.11.0-1015-lowlatencyUbuntu

Fixed in:6.11.0-1015.16~24.04.2USN-7605-2

linux-image-6.11.0-1015-lowlatency-64kUbuntu

Fixed in:6.11.0-1015.16~24.04.2USN-7605-2

linux-image-6.11.0-1016-gcpUbuntu

Fixed in:6.11.0-1016.16~24.04.1USN-7605-1

linux-image-6.11.0-1016-gcp-64kUbuntu

Fixed in:6.11.0-1016.16~24.04.1USN-7605-1

linux-image-6.11.0-1018-azureUbuntu

Fixed in:6.11.0-1018.18~24.04.1USN-7628-1

linux-image-6.11.0-1018-azure-fdeUbuntu

Fixed in:6.11.0-1018.18~24.04.1USN-7628-1

linux-image-6.11.0-1024-oemUbuntu

Fixed in:6.11.0-1024.24USN-7606-1

linux-image-6.11.0-28-genericUbuntu

Fixed in:6.11.0-28.28~24.04.1USN-7605-1

linux-image-6.11.0-28-generic-64kUbuntu

Fixed in:6.11.0-28.28~24.04.1USN-7605-1

linux-image-azureUbuntu

Fixed in:6.11.0-1018.18~24.04.1USN-7628-1

linux-image-azure-6.11Ubuntu

Fixed in:6.11.0-1018.18~24.04.1USN-7628-1

linux-image-azure-fdeUbuntu

Fixed in:6.11.0-1018.18~24.04.1USN-7628-1

linux-image-azure-fde-6.11Ubuntu

Fixed in:6.11.0-1018.18~24.04.1USN-7628-1

linux-image-azure-fde-edgeUbuntu

Fixed in:6.11.0-1018.18~24.04.1USN-7628-1

linux-image-gcpUbuntu

Fixed in:6.11.0-1016.16~24.04.1USN-7605-1

linux-image-gcp-64kUbuntu

Fixed in:6.11.0-1016.16~24.04.1USN-7605-1

linux-image-generic-64k-hwe-24.04Ubuntu

Fixed in:6.11.0-28.28~24.04.1USN-7605-1

linux-image-generic-hwe-24.04Ubuntu

Fixed in:6.11.0-28.28~24.04.1USN-7605-1

linux-image-lowlatency-6.11Ubuntu

Fixed in:6.11.0-1015.16~24.04.2USN-7605-2

linux-image-lowlatency-64k-6.11Ubuntu

Fixed in:6.11.0-1015.16~24.04.2USN-7605-2

linux-image-lowlatency-64k-hwe-24.04Ubuntu

Fixed in:6.11.0-1015.16~24.04.2USN-7605-2

linux-image-lowlatency-hwe-24.04Ubuntu

Fixed in:6.11.0-1015.16~24.04.2USN-7605-2

linux-image-oem-24.04bUbuntu

Fixed in:6.11.0-1024.24USN-7606-1

linux-image-virtual-hwe-24.04Ubuntu

Fixed in:6.11.0-28.28~24.04.1USN-7605-1

linux-lowlatency-hwe-6.11Ubuntu

Fixed in:6.11.0-1015.16~24.04.2USN-7605-2

linux-oem-6.11Ubuntu

Fixed in:6.11.0-1024.24USN-7606-1

Remediation is compiled from vendor and distribution security advisories. Always confirm against the linked source for your exact version and platform.

CVSS v3 Vector

Exploitability

Attack VectorLocal

Attack ComplexityLow

Privileges RequiredLow

User InteractionNone

ScopeUnchanged

Impact

ConfidentialityNone

IntegrityNone

AvailabilityHigh

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

Exploit Intelligence

0.17%probability of exploitation in 30 days

7thpercentile

Low risk: more likely to be exploited than 7% of all known CVEs.

References

Patch3

Related Vulnerabilities

Other CWE-476 (NULL Pointer Dereference) vulnerabilities, ordered by exploit likelihood. View all

CVE	Severity	CVSS	EPSS	Exploited	Fix
CVE-2023-21758	High	7.5	92%	-	Fix
CVE-2023-21547	High	7.5	88%	-	Fix
CVE-2014-3470	Medium	4.3	86%	-	Fix
CVE-2021-44224	High	8.2	82%	-	Fix
CVE-2016-0742	High	7.5	82%	-	Fix
CVE-2009-1386	Medium	5.0	80%	-	Fix

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This product uses NVD data but is not endorsed or certified by the NVD. EPSS scores courtesy of FIRST.org (https://www.first.org/epss). Source: CISA KEV Catalog. Data as of 2025-10-01.