What’s Vulnerable › Vulnerabilities

CVE-2026-31620: ALSA: usx2y: us144mkii: fix NULL deref on missing interface 0

• Severity: medium (CVSS 4.6 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.2% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-04-24 · updated 2026-06-17
• Weakness: CWE-476

Description

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.

Affected products

• Linux kernel: from 6.18 before 6.18.24; from 6.19 before 6.19.14; from 7.0 before 7.0.1 — fixed in 6.18.24, 6.19.14, 7.0.1

How to fix

Upgrade to a fixed version: Linux kernel 6.18.24, 6.19.14, 7.0.1. Check the vendor advisory for mitigations.

References

• https://git.kernel.org/stable/c/09b145c1f1331c40dc955c0024d636f25417cddb
• https://git.kernel.org/stable/c/48bd344e1040b9f2eb512be73c13f5db83efc191
• https://git.kernel.org/stable/c/d04dd67ab10dc978c6c843c6bd6a2a66a9444f51
• https://git.kernel.org/stable/c/fbaf29ce00e7bce683f3faf4f2b326bd0a9e6602

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