{"cve":"CVE-2026-90254","nvd":{"published":"2026-09-17T17:17:21.730","modified":"2026-10-19T09:19:17.390","status":"Received","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nBluetooth: hci_sync: free the advertising instance on the failure and cancel paths\n\nadv_timeout_expire() hands a kmalloc()ed instance byte to\nhci_cmd_sync_queue() with a NULL destroy callback, and only\nadv_timeout_expire_sync() frees it. That leaks on two paths:\n\n - the return value is not checked, and hci_cmd_sync_queue() does not\n   take ownership when it fails (-ENETDOWN, -ENODEV, -ENOMEM);\n\n - a cancelled entry is not released, as _hci_cmd_sync_cancel_entry()\n   does not free entry->data when there is no destroy callback.\n   hci_cmd_sync_clear() cancels every pending entry when the controller\n   is unregistered.\n\nFree the buffer from a destroy callback, and in the caller when the entry\ncould not be queued at all.","cvss_v4":null,"cvss_v3":null,"cwes":[],"references":["https://git.kernel.org/stable/c/120d8dc042e3d45073bb6e50ee7b058a0b182627","https://git.kernel.org/stable/c/193182c6467f508a8a61d5db506d796ffed6eee6","https://git.kernel.org/stable/c/2e3d827cd56865c14f6ca118bbccd7801091fb21","https://git.kernel.org/stable/c/9c3b6c1413bd0b4993642d987616331f84d9b7f5","https://git.kernel.org/stable/c/bb5ca1cc7744c41c59002bd6523714a685ae6595"],"products":[],"source":"nvd","synced_at":"2026-10-19T22:55:23.253742848+00:00"},"epss":{"cve":"CVE-2026-90254","score":0.00206,"percentile":0.10497,"date":"2026-10-26"},"kev":null,"osv":[],"attribution":["This product uses the NVD API but is not endorsed or certified by the NVD.","EPSS scores: FIRST Exploit Prediction Scoring System, https://www.first.org/epss","Known exploited vulnerabilities: CISA Known Exploited Vulnerabilities Catalog, https://www.cisa.gov/known-exploited-vulnerabilities-catalog","Package advisories: OSV (https://osv.dev), from the GitHub Advisory Database, PyPA, Go, RustSec and other ecosystem databases, under CC-BY 4.0 or CC0","CVE records: the CVE Program's CVE List (https://www.cve.org), under its terms of use (https://www.cve.org/Legal/TermsOfUse). CVE is a registered trademark of The MITRE Corporation; this product is not affiliated with the CVE Program."]}