Is CVE-2025-21874 in the CISA KEV catalog?

No. CVE-2025-21874 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the CVSS severity of CVE-2025-21874?

CVE-2025-21874 has a CVSS v3 base score of 5.5 (MEDIUM).

What is the EPSS score for CVE-2025-21874?

CVE-2025-21874 has an EPSS score of 0.19% (8th percentile), estimating the probability of exploitation in the next 30 days.

How do I fix CVE-2025-21874?

Upgrade linux on debian 13 to 6.12.19-1 or later. Fixes are available for 25 affected products.

CVE & CISA-KEV Catalog

CVE-2025-21874

MEDIUM

5.5

CVSS v3

NVD

Description

In the Linux kernel, the following vulnerability has been resolved: dm-integrity: Avoid divide by zero in table status in Inline mode In Inline mode, the journal is unused, and journal_sectors is zero. Calculating the journal watermark requires dividing by journal_sectors, which should be done only if the journal is configured. Otherwise, a simple table query (dmsetup table) can cause OOPS. This bug did not show on some systems, perhaps only due to compiler optimization. On my 32-bit testing machine, this reliably crashes with the following: : Oops: divide error: 0000 [#1] PREEMPT SMP : CPU: 0 UID: 0 PID: 2450 Comm: dmsetup Not tainted 6.14.0-rc2+ #959 : EIP: dm_integrity_status+0x2f8/0xab0 [dm_integrity] ...

CWE-369

How to fix

Remediation Available

linuxDebian

Fixed in:6.12.19-1CVE-2025-21874

linux-azure-6.11Ubuntu

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

linux-gcp-6.11Ubuntu

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

linux-hwe-6.11Ubuntu

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

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-azureUbuntu

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

linux-image-azure-fdeUbuntu

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

linux-image-gcpUbuntu

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

linux-image-gcp-64kUbuntu

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

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

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

linux-image-generic-hwe-24.04Ubuntu

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

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

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

linux-image-lowlatency-hwe-24.04Ubuntu

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

linux-image-oem-24.04bUbuntu

Fixed in:6.11.0-1022.22USN-7521-1

linux-image-virtual-hwe-24.04Ubuntu

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

linux-lowlatency-hwe-6.11Ubuntu

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

linux-oem-6.11Ubuntu

Fixed in:6.11.0-1022.22USN-7521-1

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

0.19%probability of exploitation in 30 days

8thpercentile

Low risk: more likely to be exploited than 8% of all known CVEs.

References

Patch3

Related Vulnerabilities

Other CWE-369 vulnerabilities, ordered by exploit likelihood. View all

CVE	Severity	CVSS	EPSS	Exploited	Fix
CVE-2012-0207	High	7.5	20%	-	Fix
CVE-2017-8537	Medium	5.5	17%	-	-
CVE-2017-8536	Medium	5.5	17%	-	-
CVE-2017-8535	Medium	5.5	17%	-	-
CVE-2007-2237	Medium	5.5	15%	-	-
CVE-2025-0317	High	7.5	13%	-	-

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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 2025-10-30.