CVE-2026-31620
Full vulnerability record from the local CVENow database.
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.
Severity
MEDIUM
CVSS score
4.6
(v3.1)
Vulnerability status
Analyzed
Source identifier
416baaa9-dc9f-4396-8d5f-8c081fb06d67
Published
2026-04-24 15:16:41.280000
Last modified
2026-11-06 16:18:03.650000
View original CVE JSON
{
"id": "CVE-2026-31620",
"sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"published": "2026-04-24T15:16:41.280",
"lastModified": "2026-11-06T16:18:03.650",
"vulnStatus": "Analyzed",
"cveTags": [],
"descriptions": [
{
"lang": "en",
"value": "In the Linux kernel, the following vulnerability has been resolved:\n\nALSA: usx2y: us144mkii: fix NULL deref on missing interface 0\n\nA malicious USB device with the TASCAM US-144MKII device id can have a\nconfiguration containing bInterfaceNumber=1 but no interface 0. USB\nconfiguration descriptors are not required to assign interface numbers\nsequentially, so usb_ifnum_to_if(dev, 0) returns will NULL, which will\nthen be dereferenced directly.\n\nFix this up by checking the return value properly."
}
],
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"programFiles": [
"sound/usb/usx2y/us144mkii.c"
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}
]
}
],
"metrics": {
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"type": "Primary",
"cvssData": {
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"vectorString": "CVSS:3.1/AV:P/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
"baseScore": 4.6,
"baseSeverity": "MEDIUM",
"attackVector": "PHYSICAL",
"attackComplexity": "LOW",
"privilegesRequired": "NONE",
"userInteraction": "NONE",
"scope": "UNCHANGED",
"confidentialityImpact": "NONE",
"integrityImpact": "NONE",
"availabilityImpact": "HIGH"
},
"exploitabilityScore": 0.9,
"impactScore": 3.6
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"ssvcData": {
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"id": "CVE-2026-31620",
"options": [
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"role": "CISA Coordinator",
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"weaknesses": [
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"source": "[email protected]",
"type": "Primary",
"description": [
{
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"value": "CWE-476"
}
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"configurations": [
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