CVE-2025-39951

Severity CVSS v4.0:

Pending analysis

Type:

CWE-416 Use After Free

Publication date:

04/10/2025

Last modified:

23/01/2026

Description

In the Linux kernel, the following vulnerability has been resolved: um: virtio_uml: Fix use-after-free after put_device in probe When register_virtio_device() fails in virtio_uml_probe(), the code sets vu_dev->registered = 1 even though the device was not successfully registered. This can lead to use-after-free or other issues.

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::::::::	5.5 (including)	5.10.245 (excluding)
cpe:2.3:o:linux:linux_kernel::::::::	5.11 (including)	5.15.194 (excluding)
cpe:2.3:o:linux:linux_kernel::::::::	5.16 (including)	6.1.154 (excluding)
cpe:2.3:o:linux:linux_kernel::::::::	6.2 (including)	6.6.108 (excluding)
cpe:2.3:o:linux:linux_kernel::::::::	6.7 (including)	6.12.49 (excluding)
cpe:2.3:o:linux:linux_kernel::::::::	6.13 (including)	6.16.9 (excluding)
cpe:2.3:o:linux:linux_kernel:6.17:rc1::::::
cpe:2.3:o:linux:linux_kernel:6.17:rc2::::::
cpe:2.3:o:linux:linux_kernel:6.17:rc3::::::
cpe:2.3:o:linux:linux_kernel:6.17:rc4::::::
cpe:2.3:o:linux:linux_kernel:6.17:rc5::::::
cpe:2.3:o:linux:linux_kernel:6.17:rc6::::::

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

CVE-2025-39951

Description

Impact

Vulnerable products and versions

References to Advisories, Solutions, and Tools