CVE-2026-90089

CVE CVE-2026-90089EUVD EUVD-2026-81950Published 2026-09-17T16:06:04.000ZLast changed 2026-09-18T17:52:55.000ZCVSS 7.1

What the advisory describes

In the Linux kernel, the following vulnerability has been resolved: Bluetooth: btnxpuart: Validate the FW dump header length nxp_process_fw_dump() pulls the ACL header off the frame and then reads seq_num and buf_len from a struct nxp_fw_dump_hdr placed at skb->data, without checking that the ACL payload is long enough to contain it. h4_recv_buf() collects HCI_ACL_HDR_SIZE bytes of header followed by the number of payload bytes named in that header, so skb->len is 4 + dlen with dlen supplied by the controller and possibly smaller than the 8 byte dump header, or zero. A short frame with connection handle 0xfff therefore reads both fields from beyond the received data. Beyond the read itself, buf_len is what terminates a dump: a value of zero makes the driver call hci_devcd_complete() and reset the controller, so a truncated frame can end a dump early. Use skb_pull_data() to validate and pull the FW dump header before accessing its fields. Warn and reject the chunk if the header is truncated.

Source: EUVD (ENISA), in the words of the advisory.

Products the advisory names

These come from the advisory itself, not from any check we performed.

Linux — Linux 998e447f443f138c90faa6ff3845082af419070e <060fa7592bdc043a93b6b7870f5b8551206d315d; 998e447f443f138c90faa6ff3845082af419070e <a644b8df94966b672ac656577df98bd01bc88393; patch: 6.18.52; patch: 0; patch: 7.2.6; 6.15; patch: 7.3-rc1; 998e447f443f138c90faa6ff3845082af419070e <22d419db7f9a01bea22cfcf66774d2b2fd4bb354

The versions shown are the advisory's own. Patchlage compares no version numbers and derives no judgement from them — which version is installed is something a person has to look up.

Carried in the product catalogue

An estate covering these products can be recorded in Patchlage. An advisory about them appears in the next morning's situation report.

Linux — Linux

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