Is CVE-2025-21923 in the CISA KEV catalog?

No. CVE-2025-21923 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the CVSS severity of CVE-2025-21923?

CVE-2025-21923 has a CVSS v3 base score of 7.8 (HIGH).

What is the EPSS score for CVE-2025-21923?

CVE-2025-21923 has an EPSS score of 0.19% (9th percentile), estimating the probability of exploitation in the next 30 days.

How do I fix CVE-2025-21923?

Upgrade linux on debian 13 to 6.12.19-1 or later. Fixes are available for 30 affected products.

CVE & CISA-KEV Catalog

CVE-2025-21923

HIGH

7.8

CVSS v3

NVD

Description

In the Linux kernel, the following vulnerability has been resolved: HID: hid-steam: Fix use-after-free when detaching device When a hid-steam device is removed it must clean up the client_hdev used for intercepting hidraw access. This can lead to scheduling deferred work to reattach the input device. Though the cleanup cancels the deferred work, this was done before the client_hdev itself is cleaned up, so it gets rescheduled. This patch fixes the ordering to make sure the deferred work is properly canceled.

CWE-416Use After Free

How to fix

Remediation Available

linuxDebian

Fixed in:6.12.19-1CVE-2025-21923

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

ConfidentialityHigh

IntegrityHigh

AvailabilityHigh

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

Exploit Intelligence

0.19%probability of exploitation in 30 days

9thpercentile

Low risk: more likely to be exploited than 9% of all known CVEs.

References

Patch4

Related Vulnerabilities

Other CWE-416 (Use After Free) vulnerabilities, ordered by exploit likelihood. View all

CVE	Severity	CVSS	EPSS	Exploited	Fix
CVE-2019-0708	Critical	9.8	100%	KEV + Ransom	-
CVE-2021-31166	Critical	9.8	100%	KEV	Fix
CVE-2015-5119	Critical	9.8	99%	KEV	-
CVE-2010-3962	High	8.1	97%	KEV	-
CVE-2015-0313	Critical	9.8	96%	KEV	Fix
CVE-2017-9798	High	7.5	95%	-	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 2025-04-16.