{"id":"CVE-2026-31620","title":"ALSA: usx2y: us144mkii: fix NULL deref on missing interface 0","summary":"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 bInterfac…","severity":"none","vendor":"Linux","product":"Linux","affected":["Linux >= dee1bcf28a3dd13ddb2e9200407864f73e9c4d63 < 09b145c1f1331c40dc955c0024d636f25417cddb","Linux >= dee1bcf28a3dd13ddb2e9200407864f73e9c4d63 < fbaf29ce00e7bce683f3faf4f2b326bd0a9e6602","Linux >= dee1bcf28a3dd13ddb2e9200407864f73e9c4d63 < d04dd67ab10dc978c6c843c6bd6a2a66a9444f51","Linux >= dee1bcf28a3dd13ddb2e9200407864f73e9c4d63 < 48bd344e1040b9f2eb512be73c13f5db83efc191","Linux 6.18"],"ssvc":{"exploitation":"none","automatable":"no","technicalImpact":"partial","timestamp":"2026-11-06T15:22:50.866253Z"},"published":"2026-04-24","updated":"2026-11-06","sourceUpdated":"2026-11-06T15:32:19.973Z","source":"CVEORG","sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-31620","references":[{"url":"https://git.kernel.org/stable/c/09b145c1f1331c40dc955c0024d636f25417cddb"},{"url":"https://git.kernel.org/stable/c/fbaf29ce00e7bce683f3faf4f2b326bd0a9e6602"},{"url":"https://git.kernel.org/stable/c/d04dd67ab10dc978c6c843c6bd6a2a66a9444f51"},{"url":"https://git.kernel.org/stable/c/48bd344e1040b9f2eb512be73c13f5db83efc191"}],"tags":["cve.org"],"epss":0.00196,"epssPercentile":0.09396,"ingestedAt":"2026-11-06T15:54:04.054Z","slug":"CVE-2026-31620","body":"## Overview\n\nIn 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.\n\n## Affected\n\n- `Linux >= dee1bcf28a3dd13ddb2e9200407864f73e9c4d63 < 09b145c1f1331c40dc955c0024d636f25417cddb`\n- `Linux >= dee1bcf28a3dd13ddb2e9200407864f73e9c4d63 < fbaf29ce00e7bce683f3faf4f2b326bd0a9e6602`\n- `Linux >= dee1bcf28a3dd13ddb2e9200407864f73e9c4d63 < d04dd67ab10dc978c6c843c6bd6a2a66a9444f51`\n- `Linux >= dee1bcf28a3dd13ddb2e9200407864f73e9c4d63 < 48bd344e1040b9f2eb512be73c13f5db83efc191`\n- `Linux 6.18`\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"sunlit","depthScore":3,"depthScoreParts":{"impact":2.8,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[]}