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CVE-2026-74499: Linux

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CVSS

0,2%

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_akai_output() snd_usbmidi_akai_output() computes its fill-loop bound buf_end = ep->max_transfer - MAX_AKAI_SYSEX_LEN - 1; as a signed int, so a small device-advertised bulk-OUT max_transfer makes buf_end negative. The loop guard then compares the u32 urb->transfer_buffer_length against that negative int: the usual arithmetic conversion turns buf_end into a large unsigned value, so the guard stays true and each iteration keeps appending SysEx framing and payload bytes past the end of the URB transfer buffer, which is only max_transfer bytes long. A USB device that advertises a tiny bulk-OUT endpoint can therefore trigger an attacker-length- and content-controlled heap out-of-bounds write when a process writes to the created /dev/snd/midiC*D* node. Return early when there is no room for even one SysEx, so the loop is never entered with a bound that would wrap. The loop is the last statement of the function, so bailing out is equivalent to it not running. Discovered by XBOW, triaged by Baul Lee <[email protected]>

    Засегнати продукти

    • Linux Linux: 4434ade8c9334a3ab975d8993de456f06841899e преди 78dfdeb8d2065524ed5928d6470bf3d3244d1009; 4434ade8c9334a3ab975d8993de456f06841899e преди 00cc659a42ac4e94ec880fae2c9bf22fce69c2e8; 4434ade8c9334a3ab975d8993de456f06841899e преди ce949d66607cfb000b8d8d84f80f35a886e72683; 4434ade8c9334a3ab975d8993de456f06841899e преди 29a4c29943631301e85f5e9d10f25741bd78e7ba; 4434ade8c9334a3ab975d8993de456f06841899e преди 9b22a5c8310b0d55d04f5f0159b913a2fb8b444f; 4434ade8c9334a3ab975d8993de456f06841899e преди b5305a0d0bb8e90a6fc9f88270d5f6c9b8c40081; 4434ade8c9334a3ab975d8993de456f06841899e преди 2b7a0f330dd90dd1a7657cec0db019ee1efa4372; 4434ade8c9334a3ab975d8993de456f06841899e преди 0970274613fb463d376211450cab066d34ebfe6a
    • Linux Linux: 2.6.35; преди 2.6.35; 5.10.265 до 5.10.*; 5.15.216 до 5.15.*; 6.1.183 до 6.1.*; 6.6.151 до 6.6.*; 6.12.103 до 6.12.*; 6.18.44 до 6.18.*; 7.1.8 до 7.1.*; от 7.2 нататък

    История

    • 15 август 2026 Публикувано

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    Първоизточници

    CVE-2026-74499: Linux | freedomonline.bg