CVE & CISA-KEV Catalog

CVE-2025-21661

MEDIUM
5.5
CVSS v3
NVD

Description

In the Linux kernel, the following vulnerability has been resolved: gpio: virtuser: fix missing lookup table cleanups When a virtuser device is created via configfs and the probe fails due to an incorrect lookup table, the table is not removed. This prevents subsequent probe attempts from succeeding, even if the issue is corrected, unless the device is released. Additionally, cleanup is also needed in the less likely case of platform_device_register_full() failure. Besides, a consistent memory leak in lookup_table->dev_id was spotted using kmemleak by toggling the live state between 0 and 1 with a correct lookup table. Introduce gpio_virtuser_remove_lookup_table() as the counterpart to the existing gpio_virtuser_make_lookup_table() and call it from all necessary points to ensure proper cleanup.

CWE-401Missing Release of Memory (Memory Leak)

How to fix

Remediation Available
linuxDebian
Fixed in:6.12.10-1CVE-2025-21661
Fixed in:6.12.10-1CVE-2025-21661
linux-hwe-6.11Ubuntu
Fixed in:6.11.0-21.21~24.04.1USN-7379-1
linux-image-6.11.0-1011-lowlatencyUbuntu
Fixed in:6.11.0-1011.12~24.04.1USN-7381-1
linux-image-6.11.0-1011-lowlatency-64kUbuntu
Fixed in:6.11.0-1011.12~24.04.1USN-7381-1
linux-image-6.11.0-1017-oemUbuntu
Fixed in:6.11.0-1017.17USN-7382-1
linux-image-6.11.0-21-genericUbuntu
Fixed in:6.11.0-21.21~24.04.1+1USN-7379-1
linux-image-6.11.0-21-generic-64kUbuntu
Fixed in:6.11.0-21.21~24.04.1+1USN-7379-1
linux-image-generic-64k-hwe-24.04Ubuntu
Fixed in:6.11.0-21.21~24.04.1USN-7379-1
linux-image-generic-hwe-24.04Ubuntu
Fixed in:6.11.0-21.21~24.04.1USN-7379-1
linux-image-lowlatency-64k-hwe-24.04Ubuntu
Fixed in:6.11.0-1011.12~24.04.1USN-7381-1
linux-image-lowlatency-hwe-24.04Ubuntu
Fixed in:6.11.0-1011.12~24.04.1USN-7381-1
linux-image-oem-24.04bUbuntu
Fixed in:6.11.0-1017.17USN-7382-1
linux-image-virtual-hwe-24.04Ubuntu
Fixed in:6.11.0-21.21~24.04.1USN-7379-1
linux-lowlatency-hwe-6.11Ubuntu
Fixed in:6.11.0-1011.12~24.04.1USN-7381-1
linux-oem-6.11Ubuntu
Fixed in:6.11.0-1017.17USN-7382-1

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

Related Vulnerabilities

Other CWE-401 (Missing Release of Memory (Memory Leak)) vulnerabilities, ordered by exploit likelihood. View all

CVESeverityCVSSEPSSExploitedFix
CVE-2020-13934High7.564%-Fix
CVE-2016-6304High7.563%-Fix
CVE-2019-12265Medium5.355%-Fix
CVE-2001-0136Medium5.045%--
CVE-2016-4232High7.536%--
CVE-2001-0543Medium5.021%--
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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.