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CVE-2026-43203: Linux

7.5

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 по мрежата, при специфични условия, без вход и след действие от потребителя.

    Описание

    Оригинално описание

    In the Linux kernel, the following vulnerability has been resolved: atm: fore200e: fix use-after-free in tasklets during device removal When the PCA-200E or SBA-200E adapter is being detached, the fore200e is deallocated. However, the tx_tasklet or rx_tasklet may still be running or pending, leading to use-after-free bug when the already freed fore200e is accessed again in fore200e_tx_tasklet() or fore200e_rx_tasklet(). One of the race conditions can occur as follows: CPU 0 (cleanup) | CPU 1 (tasklet) fore200e_pca_remove_one() | fore200e_interrupt() fore200e_shutdown() | tasklet_schedule() kfree(fore200e) | fore200e_tx_tasklet() | fore200e-> // UAF Fix this by ensuring tx_tasklet or rx_tasklet is properly canceled before the fore200e is released. Add tasklet_kill() in fore200e_shutdown() to synchronize with any pending or running tasklets. Moreover, since fore200e_reset() could prevent further interrupts or data transfers, the tasklet_kill() should be placed after fore200e_reset() to prevent the tasklet from being rescheduled in fore200e_interrupt(). Finally, it only needs to do tasklet_kill() when the fore200e state is greater than or equal to FORE200E_STATE_IRQ, since tasklets are uninitialized in earlier states. In a word, the tasklet_kill() should be placed in the FORE200E_STATE_IRQ branch within the switch...case structure. This bug was identified through static analysis.

    Засегнати продукти

    • Linux Linux: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 преди 91f25749aaf57c47ae1e12478144e6ea8c8562f2; 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 преди 73fbc5d1a9ccb626937500bbd67136f077d8237b; 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 преди aba0b4bc09376dfc3d53c826514fe38fc8337f52; 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 преди e075ec9b08f862dade8011481058f7eb5f716c57; 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 преди 97900f512252a59f23d6ce4ab215cc88fed66e68; 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 преди e4ff4e3ffcf9d5aad380cdd1d8cdc008bb34f97d; 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 преди 5189368f10903956be05062d160b2804bf5e5016; 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 преди 8930878101cd40063888a68af73b1b0f8b6c79bc
    • Linux Linux: 2.6.12; преди 2.6.12; 5.10.252 до 5.10.*; 5.15.202 до 5.15.*; 6.1.165 до 6.1.*; 6.6.128 до 6.6.*; 6.12.75 до 6.12.*; 6.18.16 до 6.18.*; 6.19.6 до 6.19.*; от 7.0 нататък

    История

    • 6 май 2026 Публикувано

    Други уязвимости в Linux Linux

    Първоизточници

    CVE-2026-43203: Linux | freedomonline.bg