CVE-2026-80760

CVE CVE-2026-80760EUVD EUVD-2026-71403Published 2026-09-04T15:12:32.000Z

What the advisory describes

In the Linux kernel, the following vulnerability has been resolved: Bluetooth: MGMT: reject HCI_CMD_SYNC params_len above 255 mgmt_hci_cmd_sync() checks that the message length agrees with params_len but puts no upper bound on it. params_len is __le16 while the parameter length in the HCI command header is a u8: struct hci_command_hdr { __le16 opcode; __u8 plen; } __packed; hci_cmd_sync_alloc() assigns one to the other: hdr->plen = plen; if (plen) skb_put_data(skb, param, plen); so a params_len of 256 leaves plen at 0 while all 256 bytes are still appended. The frame handed to the driver then declares no parameters and carries 256 of them. On a length framed transport such as H:4 the controller takes the trailing bytes as the start of the next packet. The mgmt socket MTU is HCI_MAX_FRAME_SIZE, so params_len can reach about 1KB this way. Commit 03f1700b9b4d ("Bluetooth: MGMT: reject malformed HCI_CMD_SYNC commands") only made params_len agree with the message length, a value that fits the message but not the header field is still accepted. Reject params_len that does not fit the header field.

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 827af4787e74e8df9e8e0677a69fbb15e0856d2f <b7d9edcf9fe6e9ec3a2e80ef9e8d44ef9b4f2894; 827af4787e74e8df9e8e0677a69fbb15e0856d2f <0bd0195ce25737cbdd0eabc54319ee0ddf3a0ad2; patch: 6.18.47; 6.13; patch: 7.1.11; 827af4787e74e8df9e8e0677a69fbb15e0856d2f <5d95286b6d6e8f1d304da7522bfa6860fc017e48; 827af4787e74e8df9e8e0677a69fbb15e0856d2f <6e1c44878aa3ee7336efeaf01414b030b0a5c273; patch: 0; patch: 7.3-rc1; patch: 7.2.1

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

Does this concern one of your customers?

This page cannot answer that — it does not know your estate. Whoever has recorded their environments gets the answer the morning after publication, together with a paragraph they can forward to the customer unedited.

Try it for 28 days

Patchlage reports hits and suspected hits. About everything else this system says nothing — neither this page nor the situation report ever claims that an estate is safe.