{"cve":{"cve_id":"CVE-2026-53051","is_kev":false,"kev_date_added":null,"kev_vendor_project":null,"kev_product":null,"kev_vulnerability_name":null,"kev_short_description":null,"kev_required_action":null,"kev_due_date":null,"kev_known_ransomware":null,"kev_notes":null,"kev_cwes":null,"epss_score":null,"epss_percentile":null,"epss_as_of":null,"description":"In the Linux kernel, the following vulnerability has been resolved:\n\nPCI: tegra194: Fix CBB timeout caused by DBI access before core power-on\n\nWhen PERST# is deasserted twice (assert -> deassert -> assert -> deassert),\na CBB (Control Backbone) timeout occurs at DBI register offset 0x8bc\n(PCIE_MISC_CONTROL_1_OFF). This happens because pci_epc_deinit_notify()\nand dw_pcie_ep_cleanup() are called before reset_control_deassert() powers\non the controller core.\n\nThe call chain that causes the timeout:\n\n  pex_ep_event_pex_rst_deassert()\n    pci_epc_deinit_notify()\n      pci_epf_test_epc_deinit()\n        pci_epf_test_clear_bar()\n          pci_epc_clear_bar()\n            dw_pcie_ep_clear_bar()\n              __dw_pcie_ep_reset_bar()\n                dw_pcie_dbi_ro_wr_en()      <- Accesses 0x8bc DBI register\n    reset_control_deassert(pcie->core_rst)  <- Core powered on HERE\n\nThe DBI registers, including PCIE_MISC_CONTROL_1_OFF (0x8bc), are only\naccessible after the controller core is powered on via\nreset_control_deassert(pcie->core_rst). Accessing them before this point\nresults in a CBB timeout because the hardware is not yet operational.\n\nFix this by moving pci_epc_deinit_notify() and dw_pcie_ep_cleanup() to\nafter reset_control_deassert(pcie->core_rst), ensuring the controller is\nfully powered on before any DBI register accesses occur.","published_at":"2026-06-24T16:29:56.949000Z","last_modified_at":null,"cvss_v3_score":null,"cvss_v3_vector":null,"cvss_v3_severity":null,"cvss_v4_score":null,"cvss_v4_vector":null,"cvss_v4_severity":null,"ssvc_decision":null,"ssvc_exploitation":null,"ssvc_automatable":null,"ssvc_technical_impact":null,"cwes":null,"nvd_references":["https://git.kernel.org/stable/c/010983063a806720b45778d191335f8ea864fea3","https://git.kernel.org/stable/c/b059a41bdd5b202b2b9d7708403fb43c69689e53","https://git.kernel.org/stable/c/ce899f9c019591b73ef84b9afa332ed53beece25","https://git.kernel.org/stable/c/34b3eef48d980cd37b876e128bbf314f69fb5d70"],"vuln_status":null,"trending_score":null,"is_trending":false,"has_trended":false,"trended_number_one":false,"trending_peak_score":null,"trending_peak_rank":null,"started_trending_at":null,"trended_number_one_at":null,"summary_generated":null,"summary_generated_at":null,"summary_model":null,"created_at":"2026-06-28T17:55:28.590503Z","updated_at":"2026-06-28T23:30:50.753831Z"},"effective_severity":null,"badges":[],"impact_analysis":[],"cvss_v3_decoded":{"version":null,"metrics":[]},"cvss_v4_decoded":{"version":null,"metrics":[]},"affected":[{"vendor_slug":"linux","vendor_name":"Linux","product_slug":"linux","product_name":"Linux","version_start":"72034050ccf4202cd6558b0afd2474f756ea3b9b","version_start_inclusive":true,"version_end":"010983063a806720b45778d191335f8ea864fea3","version_end_inclusive":false,"cpe23_uri":"cve5:linux:linux:72034050ccf4202cd6558b0afd2474f756ea3b9b:010983063a806720b45778d191335f8ea864fea3"},{"vendor_slug":"linux","vendor_name":"Linux","product_slug":"linux","product_name":"Linux","version_start":"40e2125381dc11379112485e3eefdd25c6df5375","version_start_inclusive":true,"version_end":"b059a41bdd5b202b2b9d7708403fb43c69689e53","version_end_inclusive":false,"cpe23_uri":"cve5:linux:linux:40e2125381dc11379112485e3eefdd25c6df5375:b059a41bdd5b202b2b9d7708403fb43c69689e53"},{"vendor_slug":"linux","vendor_name":"Linux","product_slug":"linux","product_name":"Linux","version_start":"40e2125381dc11379112485e3eefdd25c6df5375","version_start_inclusive":true,"version_end":"ce899f9c019591b73ef84b9afa332ed53beece25","version_end_inclusive":false,"cpe23_uri":"cve5:linux:linux:40e2125381dc11379112485e3eefdd25c6df5375:ce899f9c019591b73ef84b9afa332ed53beece25"},{"vendor_slug":"linux","vendor_name":"Linux","product_slug":"linux","product_name":"Linux","version_start":"40e2125381dc11379112485e3eefdd25c6df5375","version_start_inclusive":true,"version_end":"34b3eef48d980cd37b876e128bbf314f69fb5d70","version_end_inclusive":false,"cpe23_uri":"cve5:linux:linux:40e2125381dc11379112485e3eefdd25c6df5375:34b3eef48d980cd37b876e128bbf314f69fb5d70"},{"vendor_slug":"linux","vendor_name":"Linux","product_slug":"linux","product_name":"Linux","version_start":"70212c2300971506e986d95000d2745529cac9d7","version_start_inclusive":true,"version_end":"70212c2300971506e986d95000d2745529cac9d7","version_end_inclusive":true,"cpe23_uri":"cve5:linux:linux:70212c2300971506e986d95000d2745529cac9d7:70212c2300971506e986d95000d2745529cac9d7"},{"vendor_slug":"linux","vendor_name":"Linux","product_slug":"linux","product_name":"Linux","version_start":"6.12.2","version_start_inclusive":true,"version_end":"6.12.91","version_end_inclusive":false,"cpe23_uri":"cve5:linux:linux:6.12.2:6.12.91"},{"vendor_slug":"linux","vendor_name":"Linux","product_slug":"linux","product_name":"Linux","version_start":"6.11.11","version_start_inclusive":true,"version_end":"6.12","version_end_inclusive":false,"cpe23_uri":"cve5:linux:linux:6.11.11:6.12"},{"vendor_slug":"linux","vendor_name":"Linux","product_slug":"linux","product_name":"Linux","version_start":"6.13","version_start_inclusive":true,"version_end":"6.13","version_end_inclusive":true,"cpe23_uri":"cve5:linux:linux:6.13:6.13"},{"vendor_slug":"linux","vendor_name":"Linux","product_slug":"linux","product_name":"Linux","version_start":"0","version_start_inclusive":true,"version_end":"6.13","version_end_inclusive":false,"cpe23_uri":"cve5:linux:linux:0:6.13"},{"vendor_slug":"linux","vendor_name":"Linux","product_slug":"linux","product_name":"Linux","version_start":"6.12.91","version_start_inclusive":true,"version_end":"6.12.*","version_end_inclusive":true,"cpe23_uri":"cve5:linux:linux:6.12.91:6.12.*"},{"vendor_slug":"linux","vendor_name":"Linux","product_slug":"linux","product_name":"Linux","version_start":"6.18.33","version_start_inclusive":true,"version_end":"6.18.*","version_end_inclusive":true,"cpe23_uri":"cve5:linux:linux:6.18.33:6.18.*"},{"vendor_slug":"linux","vendor_name":"Linux","product_slug":"linux","product_name":"Linux","version_start":"7.0.10","version_start_inclusive":true,"version_end":"7.0.*","version_end_inclusive":true,"cpe23_uri":"cve5:linux:linux:7.0.10:7.0.*"},{"vendor_slug":"linux","vendor_name":"Linux","product_slug":"linux","product_name":"Linux","version_start":"7.1","version_start_inclusive":true,"version_end":"*","version_end_inclusive":true,"cpe23_uri":"cve5:linux:linux:7.1:*"}],"exploit_refs":[],"news":[],"references":[{"url":"https://git.kernel.org/stable/c/010983063a806720b45778d191335f8ea864fea3","source_type":"MISC","tags":[]},{"url":"https://git.kernel.org/stable/c/b059a41bdd5b202b2b9d7708403fb43c69689e53","source_type":"MISC","tags":[]},{"url":"https://git.kernel.org/stable/c/ce899f9c019591b73ef84b9afa332ed53beece25","source_type":"MISC","tags":[]},{"url":"https://git.kernel.org/stable/c/34b3eef48d980cd37b876e128bbf314f69fb5d70","source_type":"MISC","tags":[]}],"timeline":[{"type":"published","at":"2026-06-24T16:29:56.949000Z","label":"CVE published","source":null}]}