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CVE-2026-90414: Linux

9.1

CVSS 3.1

Няма данни

Вероятност да бъде експлоатирана в следващите 30 дни (EPSS)

Няма потвърждение

Атакува се

Няма данни

Време до експлоатация

Атакува се по мрежата, без особени условия, без вход и без действие от потребителя.

    Описание

    Оригинално описание

    In the Linux kernel, the following vulnerability has been resolved: IB/isert: reject PDUs declaring more data than was received isert_recv_done() hands each received PDU to the opcode handlers without ever looking at wc->byte_len, the number of bytes the HCA actually placed in the receive descriptor. The handlers then copy that many bytes - the data-segment length the initiator declared in the BHS (ntoh24(hdr->dlength), via the derived unsol_data_len / imm_data_len) - out of the fixed-size descriptor: isert_handle_iscsi_dataout(): sg_copy_from_buffer(sg_start, sg_nents, isert_get_data(rx_desc), unsol_data_len); isert_handle_scsi_cmd(): sg_copy_from_buffer(cmd->se_cmd.t_data_sg, sg_nents, isert_get_data(rx_desc), imm_data_len); Because the declared length is never checked against wc->byte_len, an initiator can declare a data segment larger than the bytes it actually sent (and larger than the descriptor) and cause an out-of-bounds read of the receive buffer. Nothing upstream of isert closes this door: - __iscsit_check_dataout_hdr() bounds the inbound payload against conn_ops->MaxXmitDataSegmentLength (MXDSL) - a transmit parameter, used here for the inbound check. - iscsi_set_connection_parameters() sets ops->MaxXmitDataSegmentLength = ops->TargetRecvDataSegmentLength; and TARGETRECVDATASEGMENTLENGTH is absent from the min()-clamp list in iscsi_check_acceptor_state(), so the value the initiator declares is adopted verbatim (type range 512..16777215). The initiator effectively raises its own ceiling. - isert never clamps the negotiated value to its own fixed receive descriptor (ISER_RX_SIZE, 9216 bytes), so the target core's bound and the descriptor size are unrelated. The imm_data_len == data_len path is more than an over-read: it aliases the receive descriptor via sg_set_buf() and passes it to the backend as the data source for the SCSI WRITE,

    Засегнати продукти

    • Linux Linux: b8d26b3be8b33682cf163274ed07479a70554633 преди b4706722ed3ea72882b3c986a19b4a1ba66384c4; b8d26b3be8b33682cf163274ed07479a70554633 преди bc58e9d3dc560220c57b8bdfc12af0cff1c8a43d; b8d26b3be8b33682cf163274ed07479a70554633 преди 274b1ad7e78338710864c4b4235bb1ce7e7107f9; b8d26b3be8b33682cf163274ed07479a70554633 преди 2a6b8f88fb7ee51714a1922a039225bdcaf12855; b8d26b3be8b33682cf163274ed07479a70554633 преди 39da0b7e1f530347d284cebcfc5b5afa90a173bf; b8d26b3be8b33682cf163274ed07479a70554633 преди cf36fa5357a2fb25776a568d13a3653da7d99bcb; b8d26b3be8b33682cf163274ed07479a70554633 преди 352dc85324b29f5c85876f2666f3158b645e3f18; b8d26b3be8b33682cf163274ed07479a70554633 преди 957f92ea4022fb6af4618271615a2a21a7b5bef9
    • Linux Linux: 3.10; преди 3.10; 5.10.270 до 5.10.*; 5.15.221 до 5.15.*; 6.1.188 до 6.1.*; 6.6.157 до 6.6.*; 6.12.110 до 6.12.*; 6.18.52 до 6.18.*; 7.2.6 до 7.2.*; от 7.3 нататък

    История

    • 17 септември 2026 Публикувано

    Други уязвимости в Linux Linux

    Първоизточници

    CVE-2026-90414: Linux | freedomonline.bg