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CVE-2026-80829: 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: ALSA: usb-audio: fix OOB write in snd_usbmidi_novation_output() snd_usbmidi_novation_output() lays out a two-byte header at transfer_buffer[0..1] and passes &transfer_buffer[2] together with a length of ep->max_transfer - 2 to snd_rawmidi_transmit(): count = snd_rawmidi_transmit(ep->ports[0].substream, &transfer_buffer[2], ep->max_transfer - 2); ep->max_transfer comes from the output endpoint's wMaxPacketSize via usb_maxpacket(). A malformed or malicious device can advertise a bulk OUT endpoint with a wMaxPacketSize of 1 - the USB core only clamps this value downwards - so ep->max_transfer becomes 1 and the count argument becomes -1. snd_rawmidi_transmit() passes the negative count on to __snd_rawmidi_transmit_peek(), where "if (count1 > count) count1 = count" leaves count1 negative; get_aligned_size() keeps it negative for a byte-stream substream, so the following memcpy(buffer, ..., count1) runs with a (size_t)-1 length and writes far past the transfer buffer, which was allocated with usb_alloc_coherent(ep->max_transfer). This is the same class of bug that was fixed for snd_usbmidi_akai_output() in commit 0970274613fb ("ALSA: usb-audio: fix OOB write in snd_usbmidi_akai_output()"); the novation output routine was left unguarded. Bail out when the endpoint cannot hold the two-byte header plus at least one payload byte.

    Засегнати продукти

    • Linux Linux: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 преди 558fc4485ecc704edfe7876d6cebae4738ff7ef8; 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 преди 9c8212436631b0063cb021e9f58df438e3db84d0; 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 преди e9c00d7533f99aa9833c4b598f47e3b3202fdb9a; 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 преди 94e4562fcc81badd1d467ddfb88c27e4fae974c2; 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 преди 7639ec9755d3ec0ec8cd7c0fdd2c3d3997434870; 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 преди 91919b3b99ab7ce3d7dbb39fcf7c6c742a663c0c; 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 преди 7f00dbddb51f4f74325cdc7c3f6b19fb3392481a; 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 преди 1074c2306901b44ebcb83855583c6776e1e392ea; 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 преди 1035a8f63bae28e498b0e7b5ac91d749844a7158
    • Linux Linux: 2.6.12; преди 2.6.12; 5.10.269 до 5.10.*; 5.15.220 до 5.15.*; 6.1.187 до 6.1.*; 6.6.156 до 6.6.*; 6.12.108 до 6.12.*; 6.18.49 до 6.18.*; 7.1.13 до 7.1.*; 7.2.3 до 7.2.*; от 7.3 нататък

    История

    • 4 септември 2026 Публикувано

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    Първоизточници

    CVE-2026-80829: Linux | freedomonline.bg