Medium 4.6Published Apr 24, 2026

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

Updated under an hour ago (Oct 28, 2026, 4:50 AM ET)

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Exploited in the last 30 days

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.

CVSS: 4.6 MEDIUM (v3.1, NVD)CVSS:3.1/AV:P/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Weakness (CWE): Not given
Known exploited: Not in CISA's KEV catalog
EPSS (exploitation in the next 30 days): Not loaded for this CVE
Assigned by: Linux
NVD analysis: Analyzed
Record last updated: Jun 14, 2026
First seen by InfoSec Signals: Oct 9, 2026

Affected products

Affected products

Linux Linux linux:linux (from the name)	from dee1bcf28a3dd13ddb2e9200407864f73e9c4d63 before 09b145c1f1331c40dc955c0024d636f25417cddb; from dee1bcf28a3dd13ddb2e9200407864f73e9c4d63 before fbaf29ce00e7bce683f3faf4f2b326bd0a9e6602; from dee1bcf28a3dd13ddb2e9200407864f73e9c4d63 before d04dd67ab10dc978c6c843c6bd6a2a66a9444f51; from dee1bcf28a3dd13ddb2e9200407864f73e9c4d63 before 48bd344e1040b9f2eb512be73c13f5db83efc191	CNA record
linux linux_kernel linux:linux_kernel	from 6.18 before 6.18.24; from 6.19 before 6.19.14; from 7.0 before 7.0.1	NVD

References

References

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

The CVE record on cve.org NVD's entry

The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.