Is CVE-2025-21775 in the CISA KEV catalog?

No. CVE-2025-21775 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the CVSS severity of CVE-2025-21775?

CVE-2025-21775 has a CVSS v3 base score of 5.5 (MEDIUM).

What is the EPSS score for CVE-2025-21775?

CVE-2025-21775 has an EPSS score of 0.21% (11th percentile), estimating the probability of exploitation in the next 30 days.

How do I fix CVE-2025-21775?

Upgrade linux on debian 12 to 6.1.129-1 or later. Fixes are available for 140 affected products.

CVE & CISA-KEV Catalog

CVE-2025-21775

MEDIUM

5.5

CVSS v3

NVD

Description

In the Linux kernel, the following vulnerability has been resolved: can: ctucanfd: handle skb allocation failure If skb allocation fails, the pointer to struct can_frame is NULL. This is actually handled everywhere inside ctucan_err_interrupt() except for the only place. Add the missed NULL check. Found by Linux Verification Center (linuxtesting.org) with SVACE static analysis tool.

CWE-476NULL Pointer Dereference

How to fix

Remediation Available

linuxDebian

Fixed in:6.1.129-1CVE-2025-21775

Fixed in:6.12.16-1CVE-2025-21775

linuxUbuntu

Fixed in:6.8.0-78.78USN-7703-1

linux-awsUbuntu

Fixed in:6.8.0-1035.37USN-7703-1

linux-aws-6.8Ubuntu

Fixed in:6.8.0-1035.37~22.04.1USN-7703-2

linux-azureUbuntu

Fixed in:6.8.0-1034.39USN-7737-1

linux-azure-6.11Ubuntu

Fixed in:6.11.0-1015.15~24.04.1USN-7521-1

linux-azure-6.8Ubuntu

Fixed in:6.8.0-1034.39~22.04.1USN-7737-1

linux-azure-nvidiaUbuntu

Fixed in:6.8.0-1022.23USN-7737-1

linux-gcpUbuntu

Fixed in:6.8.0-1036.38USN-7703-2

linux-gcp-6.11Ubuntu

Fixed in:6.11.0-1015.15~24.04.1USN-7521-1

linux-gcp-6.8Ubuntu

Fixed in:6.8.0-1036.38~22.04.1USN-7703-2

linux-gkeUbuntu

Fixed in:6.8.0-1032.36USN-7703-4

linux-gkeopUbuntu

Fixed in:6.8.0-1019.21USN-7703-2

linux-hwe-6.11Ubuntu

Fixed in:6.11.0-26.26~24.04.1USN-7521-1

linux-hwe-6.8Ubuntu

Fixed in:6.8.0-78.78~22.04.1USN-7703-4

linux-ibmUbuntu

Fixed in:6.8.0-1033.33USN-7703-2

linux-ibm-6.8Ubuntu

Fixed in:6.8.0-1033.33~22.04.1USN-7703-2

linux-image-6.11.0-1014-lowlatencyUbuntu

Fixed in:6.11.0-1014.15~24.04.1USN-7521-3

linux-image-6.11.0-1014-lowlatency-64kUbuntu

Fixed in:6.11.0-1014.15~24.04.1USN-7521-3

linux-image-6.11.0-1015-azureUbuntu

Fixed in:6.11.0-1015.15~24.04.1USN-7521-1

linux-image-6.11.0-1015-azure-fdeUbuntu

Fixed in:6.11.0-1015.15~24.04.1USN-7521-1

linux-image-6.11.0-1015-gcpUbuntu

Fixed in:6.11.0-1015.15~24.04.1USN-7521-1

linux-image-6.11.0-1015-gcp-64kUbuntu

Fixed in:6.11.0-1015.15~24.04.1USN-7521-1

linux-image-6.11.0-1022-oemUbuntu

Fixed in:6.11.0-1022.22USN-7521-1

linux-image-6.11.0-26-genericUbuntu

Fixed in:6.11.0-26.26~24.04.1USN-7521-1

linux-image-6.11.0-26-generic-64kUbuntu

Fixed in:6.11.0-26.26~24.04.1USN-7521-1

linux-image-6.8.0-1019-gkeopUbuntu

Fixed in:6.8.0-1019.21USN-7703-2

linux-image-6.8.0-1022-azure-nvidiaUbuntu

Fixed in:6.8.0-1022.23USN-7737-1

linux-image-6.8.0-1032-gkeUbuntu

Fixed in:6.8.0-1032.36USN-7703-4

linux-image-6.8.0-1032-oracleUbuntu

Fixed in:6.8.0-1032.33~22.04.1USN-7703-3

Fixed in:6.8.0-1032.33USN-7703-3

linux-image-6.8.0-1032-oracle-64kUbuntu

Fixed in:6.8.0-1032.33~22.04.1USN-7703-3

Fixed in:6.8.0-1032.33USN-7703-3

linux-image-6.8.0-1033-ibmUbuntu

Fixed in:6.8.0-1033.33~22.04.1USN-7703-2

Fixed in:6.8.0-1033.33USN-7703-2

linux-image-6.8.0-1034-azureUbuntu

Fixed in:6.8.0-1034.39~22.04.1USN-7737-1

Fixed in:6.8.0-1034.39USN-7737-1

linux-image-6.8.0-1034-azure-fdeUbuntu

Fixed in:6.8.0-1034.39~22.04.1USN-7737-1

Fixed in:6.8.0-1034.39USN-7737-1

linux-image-6.8.0-1035-awsUbuntu

Fixed in:6.8.0-1035.37~22.04.1USN-7703-2

Fixed in:6.8.0-1035.37USN-7703-1

linux-image-6.8.0-1035-aws-64kUbuntu

Fixed in:6.8.0-1035.37~22.04.1USN-7703-2

Fixed in:6.8.0-1035.37USN-7703-1

linux-image-6.8.0-1035-nvidiaUbuntu

Fixed in:6.8.0-1035.38~22.04.1USN-7703-4

Fixed in:6.8.0-1035.38USN-7703-4

linux-image-6.8.0-1035-nvidia-64kUbuntu

Fixed in:6.8.0-1035.38~22.04.1USN-7703-4

Fixed in:6.8.0-1035.38USN-7703-4

linux-image-6.8.0-1035-nvidia-lowlatencyUbuntu

Fixed in:6.8.0-1035.38.1USN-7703-4

linux-image-6.8.0-1035-nvidia-lowlatency-64kUbuntu

Fixed in:6.8.0-1035.38.1USN-7703-4

linux-image-6.8.0-1035-raspiUbuntu

Fixed in:6.8.0-1035.39USN-7703-4

linux-image-6.8.0-1036-gcpUbuntu

Fixed in:6.8.0-1036.38~22.04.1USN-7703-2

Fixed in:6.8.0-1036.38USN-7703-2

linux-image-6.8.0-1036-gcp-64kUbuntu

Fixed in:6.8.0-1036.38~22.04.1USN-7703-2

Fixed in:6.8.0-1036.38USN-7703-2

linux-image-6.8.0-2028-raspi-realtimeUbuntu

Fixed in:6.8.0-2028.29USN-7719-1

linux-image-6.8.0-78-genericUbuntu

Fixed in:6.8.0-78.78~22.04.1USN-7703-4

Fixed in:6.8.0-78.78USN-7703-1

linux-image-6.8.0-78-generic-64kUbuntu

Fixed in:6.8.0-78.78~22.04.1USN-7703-4

Fixed in:6.8.0-78.78USN-7703-1

linux-image-6.8.0-78-lowlatencyUbuntu

Fixed in:6.8.0-78.78.1~22.04.1USN-7703-1

Fixed in:6.8.0-78.78.1USN-7703-1

linux-image-6.8.0-78-lowlatency-64kUbuntu

Fixed in:6.8.0-78.78.1~22.04.1USN-7703-1

Fixed in:6.8.0-78.78.1USN-7703-1

linux-image-6.8.1-1030-realtimeUbuntu

Fixed in:6.8.1-1030.31USN-7703-1

linux-image-awsUbuntu

Fixed in:6.8.0-1035.37~22.04.1USN-7703-2

linux-image-aws-6.8Ubuntu

Fixed in:6.8.0-1035.37~22.04.1USN-7703-2

Fixed in:6.8.0-1035.37USN-7703-1

linux-image-aws-64kUbuntu

Fixed in:6.8.0-1035.37~22.04.1USN-7703-2

linux-image-aws-64k-6.8Ubuntu

Fixed in:6.8.0-1035.37~22.04.1USN-7703-2

Fixed in:6.8.0-1035.37USN-7703-1

linux-image-aws-64k-lts-24.04Ubuntu

Fixed in:6.8.0-1035.37USN-7703-1

linux-image-aws-lts-24.04Ubuntu

Fixed in:6.8.0-1035.37USN-7703-1

linux-image-azureUbuntu

Fixed in:6.8.0-1034.39~22.04.1USN-7737-1

Fixed in:6.11.0-1015.15~24.04.1USN-7521-1

linux-image-azure-6.8Ubuntu

Fixed in:6.8.0-1034.39~22.04.1USN-7737-1

Fixed in:6.8.0-1034.39USN-7737-1

linux-image-azure-fdeUbuntu

Fixed in:6.8.0-1034.39~22.04.1USN-7737-1

Fixed in:6.11.0-1015.15~24.04.1USN-7521-1

linux-image-azure-fde-6.8Ubuntu

Fixed in:6.8.0-1034.39~22.04.1USN-7737-1

Fixed in:6.8.0-1034.39USN-7737-1

linux-image-azure-fde-lts-24.04Ubuntu

Fixed in:6.8.0-1034.39USN-7737-1

linux-image-azure-lts-24.04Ubuntu

Fixed in:6.8.0-1034.39USN-7737-1

linux-image-azure-nvidiaUbuntu

Fixed in:6.8.0-1022.23USN-7737-1

linux-image-azure-nvidia-6.8Ubuntu

Fixed in:6.8.0-1022.23USN-7737-1

linux-image-azure-nvidia-lts-24.04Ubuntu

Fixed in:6.8.0-1022.23USN-7737-1

linux-image-gcpUbuntu

Fixed in:6.8.0-1036.38~22.04.1USN-7703-2

Fixed in:6.11.0-1015.15~24.04.1USN-7521-1

linux-image-gcp-6.8Ubuntu

Fixed in:6.8.0-1036.38~22.04.1USN-7703-2

Fixed in:6.8.0-1036.38USN-7703-2

linux-image-gcp-64kUbuntu

Fixed in:6.8.0-1036.38~22.04.1USN-7703-2

Fixed in:6.11.0-1015.15~24.04.1USN-7521-1

linux-image-gcp-64k-6.8Ubuntu

Fixed in:6.8.0-1036.38~22.04.1USN-7703-2

Fixed in:6.8.0-1036.38USN-7703-2

linux-image-gcp-64k-lts-24.04Ubuntu

Fixed in:6.8.0-1036.38USN-7703-2

linux-image-gcp-lts-24.04Ubuntu

Fixed in:6.8.0-1036.38USN-7703-2

linux-image-genericUbuntu

Fixed in:6.8.0-78.78USN-7703-1

linux-image-generic-6.8Ubuntu

Fixed in:6.8.0-78.78~22.04.1USN-7703-4

Fixed in:6.8.0-78.78USN-7703-1

linux-image-generic-64kUbuntu

Fixed in:6.8.0-78.78USN-7703-1

linux-image-generic-64k-6.8Ubuntu

Fixed in:6.8.0-78.78~22.04.1USN-7703-4

Fixed in:6.8.0-78.78USN-7703-1

linux-image-generic-64k-hwe-22.04Ubuntu

Fixed in:6.8.0-78.78~22.04.1USN-7703-4

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

Fixed in:6.11.0-26.26~24.04.1USN-7521-1

linux-image-generic-hwe-22.04Ubuntu

Fixed in:6.8.0-78.78~22.04.1USN-7703-4

linux-image-generic-hwe-24.04Ubuntu

Fixed in:6.11.0-26.26~24.04.1USN-7521-1

linux-image-generic-lpaeUbuntu

Fixed in:6.8.0-78.78USN-7703-1

linux-image-gkeUbuntu

Fixed in:6.8.0-1032.36USN-7703-4

linux-image-gke-6.8Ubuntu

Fixed in:6.8.0-1032.36USN-7703-4

linux-image-gkeopUbuntu

Fixed in:6.8.0-1019.21USN-7703-2

linux-image-gkeop-6.8Ubuntu

Fixed in:6.8.0-1019.21USN-7703-2

linux-image-ibmUbuntu

Fixed in:6.8.0-1033.33USN-7703-2

linux-image-ibm-6.8Ubuntu

Fixed in:6.8.0-1033.33~22.04.1USN-7703-2

Fixed in:6.8.0-1033.33USN-7703-2

linux-image-ibm-classicUbuntu

Fixed in:6.8.0-1033.33USN-7703-2

linux-image-ibm-lts-24.04Ubuntu

Fixed in:6.8.0-1033.33USN-7703-2

linux-image-kvmUbuntu

Fixed in:6.8.0-78.78USN-7703-1

linux-image-lowlatencyUbuntu

Fixed in:6.8.0-78.78.1USN-7703-1

linux-image-lowlatency-6.8Ubuntu

Fixed in:6.8.0-78.78.1~22.04.1USN-7703-1

Fixed in:6.8.0-78.78.1USN-7703-1

linux-image-lowlatency-64kUbuntu

Fixed in:6.8.0-78.78.1USN-7703-1

linux-image-lowlatency-64k-6.8Ubuntu

Fixed in:6.8.0-78.78.1~22.04.1USN-7703-1

Fixed in:6.8.0-78.78.1USN-7703-1

linux-image-lowlatency-64k-hwe-22.04Ubuntu

Fixed in:6.8.0-78.78.1~22.04.1USN-7703-1

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

Fixed in:6.11.0-1014.15~24.04.1USN-7521-3

linux-image-lowlatency-hwe-22.04Ubuntu

Fixed in:6.8.0-78.78.1~22.04.1USN-7703-1

linux-image-lowlatency-hwe-24.04Ubuntu

Fixed in:6.11.0-1014.15~24.04.1USN-7521-3

linux-image-nvidiaUbuntu

Fixed in:6.8.0-1035.38USN-7703-4

linux-image-nvidia-6.8Ubuntu

Fixed in:6.8.0-1035.38~22.04.1USN-7703-4

Fixed in:6.8.0-1035.38USN-7703-4

linux-image-nvidia-64kUbuntu

Fixed in:6.8.0-1035.38USN-7703-4

linux-image-nvidia-64k-6.8Ubuntu

Fixed in:6.8.0-1035.38~22.04.1USN-7703-4

Fixed in:6.8.0-1035.38USN-7703-4

linux-image-nvidia-64k-hwe-22.04Ubuntu

Fixed in:6.8.0-1035.38~22.04.1USN-7703-4

linux-image-nvidia-hwe-22.04Ubuntu

Fixed in:6.8.0-1035.38~22.04.1USN-7703-4

linux-image-nvidia-lowlatencyUbuntu

Fixed in:6.8.0-1035.38.1USN-7703-4

linux-image-nvidia-lowlatency-6.8Ubuntu

Fixed in:6.8.0-1035.38.1USN-7703-4

linux-image-nvidia-lowlatency-64kUbuntu

Fixed in:6.8.0-1035.38.1USN-7703-4

linux-image-nvidia-lowlatency-64k-6.8Ubuntu

Fixed in:6.8.0-1035.38.1USN-7703-4

linux-image-oem-22.04Ubuntu

Fixed in:6.8.0-78.78~22.04.1USN-7703-4

linux-image-oem-22.04aUbuntu

Fixed in:6.8.0-78.78~22.04.1USN-7703-4

linux-image-oem-22.04bUbuntu

Fixed in:6.8.0-78.78~22.04.1USN-7703-4

linux-image-oem-22.04cUbuntu

Fixed in:6.8.0-78.78~22.04.1USN-7703-4

linux-image-oem-22.04dUbuntu

Fixed in:6.8.0-78.78~22.04.1USN-7703-4

linux-image-oem-24.04bUbuntu

Fixed in:6.11.0-1022.22USN-7521-1

linux-image-oracleUbuntu

Fixed in:6.8.0-1032.33~22.04.1USN-7703-3

linux-image-oracle-6.8Ubuntu

Fixed in:6.8.0-1032.33~22.04.1USN-7703-3

Fixed in:6.8.0-1032.33USN-7703-3

linux-image-oracle-64kUbuntu

Fixed in:6.8.0-1032.33~22.04.1USN-7703-3

linux-image-oracle-64k-6.8Ubuntu

Fixed in:6.8.0-1032.33~22.04.1USN-7703-3

Fixed in:6.8.0-1032.33USN-7703-3

linux-image-oracle-64k-lts-24.04Ubuntu

Fixed in:6.8.0-1032.33USN-7703-3

linux-image-oracle-lts-24.04Ubuntu

Fixed in:6.8.0-1032.33USN-7703-3

linux-image-raspiUbuntu

Fixed in:6.8.0-1035.39USN-7703-4

linux-image-raspi-6.8Ubuntu

Fixed in:6.8.0-1035.39USN-7703-4

linux-image-raspi-realtimeUbuntu

Fixed in:6.8.0-2028.29USN-7719-1

linux-image-raspi-realtime-6.8Ubuntu

Fixed in:6.8.0-2028.29USN-7719-1

linux-image-realtimeUbuntu

Fixed in:6.8.1-1030.31USN-7703-1

linux-image-realtime-6.8.1Ubuntu

Fixed in:6.8.1-1030.31USN-7703-1

linux-image-virtualUbuntu

Fixed in:6.8.0-78.78USN-7703-1

linux-image-virtual-6.8Ubuntu

Fixed in:6.8.0-78.78~22.04.1USN-7703-4

Fixed in:6.8.0-78.78USN-7703-1

linux-image-virtual-hwe-22.04Ubuntu

Fixed in:6.8.0-78.78~22.04.1USN-7703-4

linux-image-virtual-hwe-24.04Ubuntu

Fixed in:6.11.0-26.26~24.04.1USN-7521-1

linux-lowlatencyUbuntu

Fixed in:6.8.0-78.78.1USN-7703-1

linux-lowlatency-hwe-6.11Ubuntu

Fixed in:6.11.0-1014.15~24.04.1USN-7521-3

linux-lowlatency-hwe-6.8Ubuntu

Fixed in:6.8.0-78.78.1~22.04.1USN-7703-1

linux-nvidiaUbuntu

Fixed in:6.8.0-1035.38USN-7703-4

linux-nvidia-6.8Ubuntu

Fixed in:6.8.0-1035.38~22.04.1USN-7703-4

linux-nvidia-lowlatencyUbuntu

Fixed in:6.8.0-1035.38.1USN-7703-4

linux-oem-6.11Ubuntu

Fixed in:6.11.0-1022.22USN-7521-1

linux-oracleUbuntu

Fixed in:6.8.0-1032.33USN-7703-3

linux-oracle-6.8Ubuntu

Fixed in:6.8.0-1032.33~22.04.1USN-7703-3

linux-raspiUbuntu

Fixed in:6.8.0-1035.39USN-7703-4

linux-raspi-realtimeUbuntu

Fixed in:6.8.0-2028.29USN-7719-1

linux-realtimeUbuntu

Fixed in:6.8.1-1030.31USN-7703-1

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

0.21%probability of exploitation in 30 days

11thpercentile

Low risk: more likely to be exploited than 11% of all known CVEs.

References

Patch5

Other references1

lists.debian.org

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 2025-11-03.