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CVE-2026-53051: Linux

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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: PCI: tegra194: Fix CBB timeout caused by DBI access before core power-on When PERST# is deasserted twice (assert -> deassert -> assert -> deassert), a CBB (Control Backbone) timeout occurs at DBI register offset 0x8bc (PCIE_MISC_CONTROL_1_OFF). This happens because pci_epc_deinit_notify() and dw_pcie_ep_cleanup() are called before reset_control_deassert() powers on the controller core. The call chain that causes the timeout: pex_ep_event_pex_rst_deassert() pci_epc_deinit_notify() pci_epf_test_epc_deinit() pci_epf_test_clear_bar() pci_epc_clear_bar() dw_pcie_ep_clear_bar() __dw_pcie_ep_reset_bar() dw_pcie_dbi_ro_wr_en() <- Accesses 0x8bc DBI register reset_control_deassert(pcie->core_rst) <- Core powered on HERE The DBI registers, including PCIE_MISC_CONTROL_1_OFF (0x8bc), are only accessible after the controller core is powered on via reset_control_deassert(pcie->core_rst). Accessing them before this point results in a CBB timeout because the hardware is not yet operational. Fix this by moving pci_epc_deinit_notify() and dw_pcie_ep_cleanup() to after reset_control_deassert(pcie->core_rst), ensuring the controller is fully powered on before any DBI register accesses occur.

    Засегнати продукти

    • Linux Linux: 72034050ccf4202cd6558b0afd2474f756ea3b9b преди 010983063a806720b45778d191335f8ea864fea3; 40e2125381dc11379112485e3eefdd25c6df5375 преди b059a41bdd5b202b2b9d7708403fb43c69689e53; 40e2125381dc11379112485e3eefdd25c6df5375 преди ce899f9c019591b73ef84b9afa332ed53beece25; 40e2125381dc11379112485e3eefdd25c6df5375 преди 34b3eef48d980cd37b876e128bbf314f69fb5d70; 70212c2300971506e986d95000d2745529cac9d7; 6.12.2 преди 6.12.91; 6.11.11 преди 6.12
    • Linux Linux: 6.13; преди 6.13; 6.12.91 до 6.12.*; 6.18.33 до 6.18.*; 7.0.10 до 7.0.*; от 7.1 нататък

    История

    • 24 юни 2026 Публикувано

    Други уязвимости в Linux Linux

    Първоизточници

    CVE-2026-53051: Linux | freedomonline.bg