{
    "dataType": "CVE_RECORD",
    "dataVersion": "5.2",
    "cveMetadata": {
        "cveId": "CVE-2026-53051",
        "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "state": "PUBLISHED",
        "assignerShortName": "Linux",
        "dateReserved": "2026-06-09T07:44:35.381Z",
        "datePublished": "2026-06-24T16:29:56.949Z",
        "dateUpdated": "2026-06-24T16:29:56.949Z"
    },
    "containers": {
        "cna": {
            "providerMetadata": {
                "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
                "shortName": "Linux",
                "dateUpdated": "2026-06-24T16:29:56.949Z"
            },
            "descriptions": [
                {
                    "lang": "en",
                    "value": "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."
                }
            ],
            "affected": [
                {
                    "product": "Linux",
                    "vendor": "Linux",
                    "defaultStatus": "unaffected",
                    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
                    "programFiles": [
                        "drivers/pci/controller/dwc/pcie-tegra194.c"
                    ],
                    "versions": [
                        {
                            "version": "72034050ccf4202cd6558b0afd2474f756ea3b9b",
                            "lessThan": "010983063a806720b45778d191335f8ea864fea3",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "40e2125381dc11379112485e3eefdd25c6df5375",
                            "lessThan": "b059a41bdd5b202b2b9d7708403fb43c69689e53",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "40e2125381dc11379112485e3eefdd25c6df5375",
                            "lessThan": "ce899f9c019591b73ef84b9afa332ed53beece25",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "40e2125381dc11379112485e3eefdd25c6df5375",
                            "lessThan": "34b3eef48d980cd37b876e128bbf314f69fb5d70",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "70212c2300971506e986d95000d2745529cac9d7",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "6.12.2",
                            "lessThan": "6.12.91",
                            "status": "affected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.11.11",
                            "lessThan": "6.12",
                            "status": "affected",
                            "versionType": "semver"
                        }
                    ]
                },
                {
                    "product": "Linux",
                    "vendor": "Linux",
                    "defaultStatus": "affected",
                    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
                    "programFiles": [
                        "drivers/pci/controller/dwc/pcie-tegra194.c"
                    ],
                    "versions": [
                        {
                            "version": "6.13",
                            "status": "affected"
                        },
                        {
                            "version": "0",
                            "lessThan": "6.13",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.12.91",
                            "lessThanOrEqual": "6.12.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.18.33",
                            "lessThanOrEqual": "6.18.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "7.0.10",
                            "lessThanOrEqual": "7.0.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "7.1",
                            "lessThanOrEqual": "*",
                            "status": "unaffected",
                            "versionType": "original_commit_for_fix"
                        }
                    ]
                }
            ],
            "cpeApplicability": [
                {
                    "nodes": [
                        {
                            "operator": "OR",
                            "negate": false,
                            "cpeMatch": [
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "6.12.2",
                                    "versionEndExcluding": "6.12.91"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "6.13",
                                    "versionEndExcluding": "6.18.33"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "6.13",
                                    "versionEndExcluding": "7.0.10"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "6.13",
                                    "versionEndExcluding": "7.1"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "6.11.11"
                                }
                            ]
                        }
                    ]
                }
            ],
            "references": [
                {
                    "url": "https://git.kernel.org/stable/c/010983063a806720b45778d191335f8ea864fea3"
                },
                {
                    "url": "https://git.kernel.org/stable/c/b059a41bdd5b202b2b9d7708403fb43c69689e53"
                },
                {
                    "url": "https://git.kernel.org/stable/c/ce899f9c019591b73ef84b9afa332ed53beece25"
                },
                {
                    "url": "https://git.kernel.org/stable/c/34b3eef48d980cd37b876e128bbf314f69fb5d70"
                }
            ],
            "title": "PCI: tegra194: Fix CBB timeout caused by DBI access before core power-on",
            "x_generator": {
                "engine": "bippy-1.2.0"
            }
        }
    }
}