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CVE-2026-89880: Linux

7.8

CVSS 3.1

Няма данни

Вероятност да бъде експлоатирана в следващите 30 дни (EPSS)

Няма потвърждение

Атакува се

Няма данни

Време до експлоатация

Атакува се локално, без особени условия, с обикновен потребителски вход и без действие от потребителя.

    Описание

    Оригинално описание

    In the Linux kernel, the following vulnerability has been resolved: media: rtl2832_sdr: release URBs and stream buffers on start_streaming() failure rtl2832_sdr_start_streaming() calls rtl2832_sdr_alloc_stream_bufs(), rtl2832_sdr_alloc_urbs() and rtl2832_sdr_submit_urbs() in sequence and shares a single err: label that only unlocks the mutex and returns. When alloc_urbs() succeeds but submit_urbs() fails, or when alloc_urbs() itself returns -ENOMEM after alloc_stream_bufs() has already succeeded, the URBs and/or the coherent DMA stream buffers stay allocated while streaming reports failure to vb2. Two latent defects follow on the next VIDIOC_STREAMON: 1) rtl2832_sdr_alloc_stream_bufs() unconditionally resets dev->buf_num to 0 and overwrites dev->buf_list[]/dev->dma_addr[], permanently leaking the coherent DMA memory allocated by the previous attempt. 2) rtl2832_sdr_alloc_urbs() never resets dev->urbs_initialized and only increments it. After a second successful pass urbs_initialized can exceed MAX_BULK_BUFS, so the subsequent rtl2832_sdr_free_urbs() walks from urbs_initialized - 1 down to 0 and reads past the end of dev->urb_list[], passing garbage pointers to usb_free_urb(). Mirror the teardown that stop_streaming() already performs: on the error path call rtl2832_sdr_free_urbs() and rtl2832_sdr_free_stream_bufs() before unlocking. Both helpers are idempotent (free_urbs kills and zeros urbs_initialized; free_stream_bufs is gated on URB_BUF and clears the buf_num counter), so partial-failure paths and the no-allocation paths remain safe. Issue identified by automated review of the INV-003 series at https://sashiko.dev/

    Засегнати продукти

    • Linux Linux: 771138920eafa399f68d3492c8a75dfeea23474b преди f14a713a36a5c87568430e9770896f2a8f5bbbb7; 771138920eafa399f68d3492c8a75dfeea23474b преди c819dea3a433ae790b829443fdcc1715d1586560; 771138920eafa399f68d3492c8a75dfeea23474b преди 0337ab0759285076a3f9dcfcc40906e69ab519b3; 771138920eafa399f68d3492c8a75dfeea23474b преди c91e8ae2b39c6da81f26f2c9877d3fd33a4465ce; 771138920eafa399f68d3492c8a75dfeea23474b преди 8bcf11a239eac4e224ad856277de9a36c91b1711; 771138920eafa399f68d3492c8a75dfeea23474b преди 26a2a985bbeee3eaa6f80ff7de732161a171ec9f; 771138920eafa399f68d3492c8a75dfeea23474b преди ac02b2c56ccef0788cea9b86990a8f349a3fc6d8; 771138920eafa399f68d3492c8a75dfeea23474b преди fe50cdaebf12cd32ff9a44d92bfd6fbc2300dbd4
    • Linux Linux: 3.15; преди 3.15; 5.10.270 до 5.10.*; 5.15.221 до 5.15.*; 6.1.188 до 6.1.*; 6.6.157 до 6.6.*; 6.12.110 до 6.12.*; 6.18.51 до 6.18.*; 7.2.5 до 7.2.*; от 7.3 нататък

    История

    • 16 септември 2026 Публикувано

    Други уязвимости в Linux Linux

    Първоизточници

    CVE-2026-89880: Linux | freedomonline.bg