Linux Kernel EUVD-2026-25513

| CVE-2026-31620 MEDIUM
NULL Pointer Dereference (CWE-476)
2026-04-24 Linux GHSA-jg3h-4jh8-mfwr
Null Pointer Dereference Linux Denial Of Service
4.6
CVSS 3.1
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CVSS VectorNVD

CVSS:3.1/AV:P/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Attack Vector
Physical
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
None
Integrity
None
Availability
High

Lifecycle Timeline

3
Analysis Generated
Apr 28, 2026 - 14:22 vuln.today
CVSS changed
Apr 28, 2026 - 14:22 NVD
4.6 (MEDIUM)
Patch available
Apr 24, 2026 - 16:16 EUVD

DescriptionNVD

In the Linux kernel, the following vulnerability has been resolved:

ALSA: usx2y: us144mkii: fix NULL deref on missing interface 0

A malicious USB device with the TASCAM US-144MKII device id can have a configuration containing bInterfaceNumber=1 but no interface 0. USB configuration descriptors are not required to assign interface numbers sequentially, so usb_ifnum_to_if(dev, 0) returns will NULL, which will then be dereferenced directly.

Fix this up by checking the return value properly.

AnalysisAI

Null pointer dereference in the ALSA TASCAM US-144MKII USB audio driver allows local attackers with physical access to a malicious USB device to cause a kernel panic and denial of service. The vulnerability exists because the driver fails to validate that USB interface 0 exists before dereferencing it, and attackers can craft a malicious USB configuration that includes only interface 1, triggering the crash when the device is connected.

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EUVD-2026-25513 vulnerability details – vuln.today
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