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CVE-2026-98265: Linux

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CVSS

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Вероятност да бъде експлоатирана в следващите 30 дни (EPSS)

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Време до експлоатация

    Описание

    Оригинално описание

    In the Linux kernel, the following vulnerability has been resolved: ALSA: usb-audio: Clamp implicit feedback packet count to URB capacity data_ep_set_params() allocates each data URB for exactly u->packets isochronous frames, so urb->iso_frame_desc[] has u->packets slots and ctx->packets is the driver's only record of that limit. For an implicit feedback sink, snd_usb_queue_pending_output_urbs() overwrites it with the sync source's packet count, which is calculated independently from the capture endpoint's parameters. When that count is larger, prepare_playback_urb() and prepare_silent_urb() can write iso_frame_desc[] past the allocation; their existing bounds limit payload bytes, not the descriptor index. The reproducer uses a high-speed UAC2 device declaring bInterval 1 for implicit feedback capture (8 packets) and bInterval 4 for playback (1 packet). On the first capture completion after the stream starts, it accesses seven descriptors spanning 112 bytes beyond the one-packet URB: BUG: KASAN: slab-out-of-bounds in prepare_playback_urb (sound/usb/pcm.c:1560) Write of size 4 at addr ffff88801e696ad0 by task vhci_rx/178 prepare_playback_urb (sound/usb/pcm.c:1560) prepare_outbound_urb (sound/usb/endpoint.c:340) snd_usb_queue_pending_output_urbs (sound/usb/endpoint.c:501) snd_complete_urb (sound/usb/endpoint.c:1834) __usb_hcd_giveback_urb (drivers/usb/core/hcd.c:1657) usb_hcd_giveback_urb (drivers/usb/core/hcd.c:1741) vhci_rx_loop (drivers/usb/usbip/vhci_rx.c:107) kthread (kernel/kthread.c:436) The buggy address belongs to the object at ffff88801e696a00 which belongs to the cache kmalloc-256 of size 256 The buggy address is located 0 bytes to the right of allocated 208-byte region [ffff88801e696a00, ffff88801e696ad0) Record the allocated packet count per endpoint and clamp both the adopted count and the packet-size copy to it. Fold the Format Type II delimiter into urb_packs before the allocation loop so the recorded limit ma

    Засегнати продукти

    • Linux Linux: df75696e70c88b22ed1d8c9d515993a858c58fd0 преди 6c5c986f761756a6ff7b3aea51c11994fc2464e5; 3a74f6b46c01d9a816378cd83c327a59f61475ec преди e44cee1bf51e606f3e70a213eb5a1abb3fa56a81; c26bde6301f20d9aafbfb7c2459a88c6a6ec178f преди 8b637ab10e40e01b452f4aff66dad335a9b89a16; 32a1f64f8ff6e2c5391f5964baec697bce25b83c преди ad279ba0dc1781229f5b52f58d38d56960400e06; e949fd266cfa1dcca7caa3faa698578c4ffd26d6 преди 79c55a7b5d71cf2a6bbd4bd7698e1b10b70f813a; cf044e44190234a41a788de1cdbb6c21f4a52e1e преди ab77e3f453c5f2499c08d6e8e218501d25bab39e; cf044e44190234a41a788de1cdbb6c21f4a52e1e преди 76a986c980bb502c7688d605ac7a67fd257a9a1b; f6fbdf797e016fbf968dd54301026b182175985a; 5.15.202 преди 5.15.224; 6.1.165 преди 6.1.191; 6.6.128 преди 6.6.160; 6.12.75 преди 6.12.112; 6.18.16 преди 6.18.54; 6.19.6 преди 6.20
    • Linux Linux: 7.0; преди 7.0; 5.15.224 до 5.15.*; 6.1.191 до 6.1.*; 6.6.160 до 6.6.*; 6.12.112 до 6.12.*; 6.18.54 до 6.18.*; 7.2.8 до 7.2.*; от 7.3 нататък

    История

    • 6 октомври 2026 Публикувано

    Други уязвимости в Linux Linux

    Първоизточници

    CVE-2026-98265: Linux | freedomonline.bg