CVE-2026-53051

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.

• https://git.kernel.org/stable/c/010983063a806720b45778d191335f8ea864fea3Patch
• https://git.kernel.org/stable/c/34b3eef48d980cd37b876e128bbf314f69fb5d70Patch
• https://git.kernel.org/stable/c/b059a41bdd5b202b2b9d7708403fb43c69689e53Patch
• https://git.kernel.org/stable/c/ce899f9c019591b73ef84b9afa332ed53beece25Patch

Published

Jun 24, 2026

Last Modified

Jul 21, 2026

Status

Analyzed

• How Strix found a critical auth bypass in etcdStrix autonomously discovered a critical authentication bypass in etcd, later designated CVE-2026-33413.
• Autonomous PentestingAI agents that find and validate exploitable vulnerabilities like this one across your applications.
• PR ReviewsPentest every pull request so vulnerable code is caught before it ships to production.
• AI Penetration TestingHow AI-driven penetration testing continuously covers your attack surface.

• CVE-2026-53046In the Linux kernel, the following vulnerability has been re…9.8
• CVE-2026-53047In the Linux kernel, the following vulnerability has been re…5.5
• CVE-2026-53048In the Linux kernel, the following vulnerability has been re…5.5
• CVE-2026-53049In the Linux kernel, the following vulnerability has been re…9.8
• CVE-2026-5305The Email Address Encoder WordPress plugin before 1.0.25, em…8.8
• CVE-2026-53050In the Linux kernel, the following vulnerability has been re…7.8
• CVE-2026-53052In the Linux kernel, the following vulnerability has been re…5.5
• CVE-2026-53053In the Linux kernel, the following vulnerability has been re…8.8
• CVE-2026-53054In the Linux kernel, the following vulnerability has been re…7.8
• CVE-2026-53055In the Linux kernel, the following vulnerability has been re…9.8
• CVE-2026-53056In the Linux kernel, the following vulnerability has been re…5.5
• CVE-2026-53057In the Linux kernel, the following vulnerability has been re…8.8