PT-2025-40647 · Linux+3 · Linux Kernel+3

Published

2025-09-10

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Updated

2026-05-07

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CVE-2025-39951

CVSS v3.1

7.8

High

VectorAV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Name of the Vulnerable Software and Affected Versions Linux kernel (affected versions not specified)
Description A flaw exists in the Linux kernel’s virtio uml device registration process. Specifically, when register virtio device() fails during virtio uml probe(), the code incorrectly sets vu dev->registered to 1, despite the device not being successfully registered. This can lead to a use-after-free condition or other related issues.
Recommendations At the moment, there is no information about a newer version that contains a fix for this vulnerability.

Exploit

Use After Free

Weakness Enumeration

CWE-416

Related Identifiers

BDU:2026-02672
CVE-2025-39951
DLA-4379-1
DLA-4404-1
DSA-6053-1
ECHO-5FC2-8895-28EC
MGASA-2025-0309
MGASA-2025-0310
OESA-2026-1275
OESA-2026-1303
OESA-2026-1304
OESA-2026-1305
USN-8033-1
USN-8033-2
USN-8033-3
USN-8033-4
USN-8033-5
USN-8033-6
USN-8033-7
USN-8033-8
USN-8034-1
USN-8034-2
USN-8095-1
USN-8095-2
USN-8095-3
USN-8095-4
USN-8095-5
USN-8100-1
USN-8125-1
USN-8126-1
USN-8141-1
USN-8163-1
USN-8163-2
USN-8165-1
USN-8243-1
USN-8261-1

Affected Products

Debian
Linuxmint
Linux Kernel
Ubuntu