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

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.

Published: 2026-04-24 Last update: 2026-04-27 Assigner: 416baaa9-dc9f-4396-8d5f-8c081fb06d67 Source: 416baaa9-dc9f-4396-8d5f-8c081fb06d67

Conclusion & alert: CVE-2026-31620 is rated Low Risk (4.1/100): low exploitation likelihood (EPSS 0.02%). Mandatory action: Low composite risk—no urgent action required; patch on your normal maintenance cycle and revisit priority if CVSS or EPSS increases.

Risk is dynamic; we continuously reassess and refresh what is shown on this page as upstream context changes.

Exploit prediction scoring system (EPSS) score for CVE-2026-31620

EPSS lead: Daily EPSS estimates relative likelihood of exploitation; percentile ranks this CVE among scored vulnerabilities (higher = more severe relative rank).

# Date Old EPSS score New EPSS score Delta (New - Old)
1 2026-04-25 0.02%

Full EPSS history (1 record total)

Common vulnerability scoring system (CVSS) metrics for CVE-2026-31620

CVSS metrics for this CVE.

No CVSS data in dataset for this CVE.

Weakness enumeration for CVE-2026-31620

GitHub Security Advisory for CVE-2026-31620

GHSA-jg3h-4jh8-mfwr · Severity: medium — In the Linux kernel, the following vulnerability has been resolved: ALSA: usx2y: us144mkii: fix...

OS Trackers for CVE-2026-31620

vendor priority summary link
debian unimportant CVE-2026-31620 unimportant priority: Debian including 1 source packages (linux), 5 status rows across 5 suites (bookworm, bullseye, forky, sid, trixie): resolved 5. https://security-tracker.debian.org/tracker/CVE-2026-31620
redhat medium https://access.redhat.com/security/cve/CVE-2026-31620
suse medium CVE-2026-31620 severity moderate: SUSE including 24 source package names (cluster-md-kmp-default, dlm-kmp-default, …), 220 product×package rows across 40 product lines (SUSE Linux Enterprise High Availability Extension 15 SP7, SUSE Linux Enterprise High Performance Computing 15 SP4-LTSS, … (40 product lines)): Known Not Affected 220. https://www.suse.com/security/cve/CVE-2026-31620/
ubuntu medium CVE-2026-31620 medium priority: Ubuntu including 161 source packages (linux, linux-allwinner-5.19, …), 1449 status rows across 9 suites (bionic, focal, jammy, noble, questing, resolute, trusty, upstream, xenial): DNE 1048, ignored 169, not-affected 134, released 83, needed 10, needs-triage 4, pending 1. https://ubuntu.com/security/CVE-2026-31620

Affected software / configurations for CVE-2026-31620

Vendor Product Version Raw CPE
No affected products in dataset.

References for CVE-2026-31620

cvelogic Threat Intelligence