CVE-2025-21856

Severity CVSS v4.0:

Pending analysis

Type:

CWE-416 Use After Free

Publication date:

12/03/2025

Last modified:

01/10/2025

Description

In the Linux kernel, the following vulnerability has been resolved: s390/ism: add release function for struct device According to device_release() in /drivers/base/core.c, a device without a release function is a broken device and must be fixed. The current code directly frees the device after calling device_add() without waiting for other kernel parts to release their references. Thus, a reference could still be held to a struct device, e.g., by sysfs, leading to potential use-after-free issues if a proper release function is not set.

Impact

Vector 3.x

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H CVSS v3.1 Severity and Metrics:

Base Score: 7.80 HIGH
Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Attack Vector (AV): Local
Attack Complexity (AC): Low
Privileges Required (PR): Low
User Interaction (UI): None
Scope (S): Unchanged
Confidentiality (C): High
Integrity (I): High
Availability (A): High

Base Score 3.x

7.80

Severity 3.x

HIGH

Vulnerable products and versions

CPE	From	Up to
cpe:2.3:o:linux:linux_kernel::::::::	6.3 (including)	6.6.80 (excluding)
cpe:2.3:o:linux:linux_kernel::::::::	6.7 (including)	6.12.17 (excluding)
cpe:2.3:o:linux:linux_kernel::::::::	6.13 (including)	6.13.5 (excluding)
cpe:2.3:o:linux:linux_kernel:6.14:rc1::::::
cpe:2.3:o:linux:linux_kernel:6.14:rc2::::::
cpe:2.3:o:linux:linux_kernel:6.14:rc3::::::

To consult the complete list of CPE names with products and versions, see this page

CVE-2025-21856

Description

Impact

Vulnerable products and versions

References to Advisories, Solutions, and Tools