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CVE-2026-80760: Linux

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    Описание

    Оригинално описание

    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.

    Засегнати продукти

    • Linux Linux: 827af4787e74e8df9e8e0677a69fbb15e0856d2f преди b7d9edcf9fe6e9ec3a2e80ef9e8d44ef9b4f2894; 827af4787e74e8df9e8e0677a69fbb15e0856d2f преди 0bd0195ce25737cbdd0eabc54319ee0ddf3a0ad2; 827af4787e74e8df9e8e0677a69fbb15e0856d2f преди 6e1c44878aa3ee7336efeaf01414b030b0a5c273; 827af4787e74e8df9e8e0677a69fbb15e0856d2f преди 5d95286b6d6e8f1d304da7522bfa6860fc017e48
    • Linux Linux: 6.13; преди 6.13; 6.18.47 до 6.18.*; 7.1.11 до 7.1.*; 7.2.1 до 7.2.*; от 7.3 нататък

    История

    • 4 септември 2026 Публикувано

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    Първоизточници

    CVE-2026-80760: Linux | freedomonline.bg