Към съдържанието
Търсене

CVE-2026-74500: Linux

Няма оценка

CVSS

Няма данни

Вероятност да бъде експлоатирана в следващите 30 дни (EPSS)

Няма потвърждение

Атакува се

Няма данни

Време до експлоатация

    Описание

    Оригинално описание

    In the Linux kernel, the following vulnerability has been resolved: ALSA: usb-audio: fix stack info leak in RME Digiface status snd_rme_digiface_read_status() reads a four-word status block from the device into an uninitialised on-stack __le32 buf[4] and, whenever the vendor control-IN transfer does not return a negative error, copies all four words into the caller's status[]. snd_usb_ctl_msg() copies the full requested size back into the caller's buffer regardless of how many bytes the data stage actually delivered: buf = kmemdup(data, size, GFP_KERNEL); err = usb_control_msg(dev, pipe, request, requesttype, value, index, buf, size, timeout); memcpy(data, buf, size); usb_control_msg() returns the transferred length on a short control-IN, which is a non-negative value, and writes only that many bytes. The remainder of the copy back is the kmemdup()ed image of the caller's buffer, so a device answering with a short data stage leaves the trailing words of buf[] holding leftover kernel stack. The only guard in the caller is err < 0, so those words are stored into status[]. They then reach user space: snd_rme_digiface_get_status_val() selects a 16-bit halfword of status[] per the control's reg/mask, and the eight Digiface status controls together expose the whole 16-byte frame to an unprivileged reader of /dev/snd/controlC*. Zero-initialise the buffer so a short read yields zeros instead of stack residue. This mirrors snd_rme_get_status1(), which already clears its output word before the same kind of vendor read. Discovered by XBOW, triaged by Baul Lee <[email protected]>

    Засегнати продукти

    • Linux Linux: 611a96f6acf2e74fe28cb90908a9c183862348ce преди b3a346d5c99dd73cf84711f2a43e42691990efd2; 611a96f6acf2e74fe28cb90908a9c183862348ce преди 7ba01e0d3539d9cf0aef3e82938f1648147744cc; 611a96f6acf2e74fe28cb90908a9c183862348ce преди 98dbfbb38e297c25c5b0af4a9018d71ac25e8554; 611a96f6acf2e74fe28cb90908a9c183862348ce преди 441aaad150c57edaf57ee482a79a3bf4c5b7e353; 3089703ab71484a8b9a7641051181d11d60f870c; 50f63f11a6ddaa0d34574df72b3fa6ee257c057d; 6.10.14 преди 6.11; 6.11.3 преди 6.12
    • Linux Linux: 6.12; преди 6.12; 6.12.103 до 6.12.*; 6.18.44 до 6.18.*; 7.1.8 до 7.1.*; 7.2 до *

    История

    • 15 август 2026 Публикувано

    Други уязвимости в Linux Linux

    Първоизточници

    CVE-2026-74500: Linux | freedomonline.bg