{"id":"CVE-2026-90089","summary":"Bluetooth: btnxpuart: Validate the FW dump header length","details":"In the Linux kernel, the following vulnerability has been resolved:\n\nBluetooth: btnxpuart: Validate the FW dump header length\n\nnxp_process_fw_dump() pulls the ACL header off the frame and then reads\nseq_num and buf_len from a struct nxp_fw_dump_hdr placed at skb-\u003edata,\nwithout checking that the ACL payload is long enough to contain it.\n\nh4_recv_buf() collects HCI_ACL_HDR_SIZE bytes of header followed by the\nnumber of payload bytes named in that header, so skb-\u003elen is 4 + dlen\nwith dlen supplied by the controller and possibly smaller than the 8\nbyte dump header, or zero. A short frame with connection handle 0xfff\ntherefore reads both fields from beyond the received data.\n\nBeyond the read itself, buf_len is what terminates a dump: a value of\nzero makes the driver call hci_devcd_complete() and reset the\ncontroller, so a truncated frame can end a dump early.\n\nUse skb_pull_data() to validate and pull the FW dump header before\naccessing its fields. Warn and reject the chunk if the header is\ntruncated.","modified":"2026-09-19T03:47:30.977000797Z","published":"2026-09-17T16:06:04.201Z","database_specific":{"cna_assigner":"Linux","osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/90xxx/CVE-2026-90089.json"},"references":[{"type":"WEB","url":"https://git.kernel.org/stable/c/060fa7592bdc043a93b6b7870f5b8551206d315d"},{"type":"WEB","url":"https://git.kernel.org/stable/c/22d419db7f9a01bea22cfcf66774d2b2fd4bb354"},{"type":"WEB","url":"https://git.kernel.org/stable/c/a644b8df94966b672ac656577df98bd01bc88393"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/90xxx/CVE-2026-90089.json"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-90089"},{"type":"PACKAGE","url":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","events":[{"introduced":"998e447f443f138c90faa6ff3845082af419070e"},{"fixed":"a644b8df94966b672ac656577df98bd01bc88393"},{"fixed":"22d419db7f9a01bea22cfcf66774d2b2fd4bb354"},{"fixed":"060fa7592bdc043a93b6b7870f5b8551206d315d"}]}],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-90089.json"}},{"package":{"name":"Kernel","ecosystem":"Linux"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"6.15.0"},{"fixed":"6.18.52"}]},{"type":"ECOSYSTEM","events":[{"introduced":"6.19.0"},{"fixed":"7.2.6"}]}],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-90089.json"}}],"schema_version":"1.9.0","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:H"}]}