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CVE-2026-80951: Linux

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CVSS

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Вероятност да бъде експлоатирана в следващите 30 дни (EPSS)

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    Описание

    Оригинално описание

    In the Linux kernel, the following vulnerability has been resolved: i3c: master: svc: bound IBI payload to the requested max_payload_len svc_i3c_master_handle_ibi() reads the IBI payload from the RX FIFO into the IBI slot. The loop is bounded by the hardware FIFO size (SVC_I3C_FIFO_SIZE), not by the slot size. slot->data points into the IBI pool, which i3c_generic_ibi_alloc_pool() sizes at max_payload_len per slot. svc_i3c_master_request_ibi() only rejects a max_payload_len larger than SVC_I3C_FIFO_SIZE, so a driver can request a smaller one. mctp-i3c requests 1. Each readsb() then copies the controller RXCOUNT bytes (up to 31) with no check against the slot size. A device that sends more bytes than the slot holds writes past slot->data, an out-of-bounds write into the IBI pool. Bound the loop by dev->ibi->max_payload_len and clamp each read to the space left in the slot, the same way dw-i3c does. A device can still send more than the requested payload. Flush the leftover bytes from the RX FIFO so they do not leak into the next transfer.

    Засегнати продукти

    • Linux Linux: dd3c52846d5954acd43f0e771689302f27dadc28 преди 7c099b0b292a68d0ef558527945dbfb756fbf893; dd3c52846d5954acd43f0e771689302f27dadc28 преди 7cc5ba756bc1cfffab9cb2695742f9f479dc73f7; dd3c52846d5954acd43f0e771689302f27dadc28 преди 35aa6730b8c5626b879a4e893fe664f59bf07d7f; dd3c52846d5954acd43f0e771689302f27dadc28 преди f296a0d5907bf88314dfda67245f7f69d1552470; dd3c52846d5954acd43f0e771689302f27dadc28 преди 5697d779577e2786ff3348ae9b77020ac0cf0aab; dd3c52846d5954acd43f0e771689302f27dadc28 преди aac3c5aababc7fb69d5bf5b0cc52d308574e3a8c; dd3c52846d5954acd43f0e771689302f27dadc28 преди e2bda39d7f9f285ec803e200b5c1f17143d0b483
    • Linux Linux: 5.12; преди 5.12; 5.15.221 до 5.15.*; 6.1.188 до 6.1.*; 6.6.157 до 6.6.*; 6.12.109 до 6.12.*; 6.18.50 до 6.18.*; 7.2.4 до 7.2.*; от 7.3 нататък

    История

    • 11 септември 2026 Публикувано

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    CVE-2026-80951: Linux | freedomonline.bg