{
    "data_version": "4.0",
    "data_type": "CVE",
    "data_format": "MITRE",
    "CVE_data_meta": {
        "ID": "CVE-2021-46959",
        "ASSIGNER": "cve@kernel.org",
        "STATE": "PUBLIC"
    },
    "description": {
        "description_data": [
            {
                "lang": "eng",
                "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nspi: Fix use-after-free with devm_spi_alloc_*\n\nWe can't rely on the contents of the devres list during\nspi_unregister_controller(), as the list is already torn down at the\ntime we perform devres_find() for devm_spi_release_controller. This\ncauses devices registered with devm_spi_alloc_{master,slave}() to be\nmistakenly identified as legacy, non-devm managed devices and have their\nreference counters decremented below 0.\n\n------------[ cut here ]------------\nWARNING: CPU: 1 PID: 660 at lib/refcount.c:28 refcount_warn_saturate+0x108/0x174\n[<b0396f04>] (refcount_warn_saturate) from [<b03c56a4>] (kobject_put+0x90/0x98)\n[<b03c5614>] (kobject_put) from [<b0447b4c>] (put_device+0x20/0x24)\n r4:b6700140\n[<b0447b2c>] (put_device) from [<b07515e8>] (devm_spi_release_controller+0x3c/0x40)\n[<b07515ac>] (devm_spi_release_controller) from [<b045343c>] (release_nodes+0x84/0xc4)\n r5:b6700180 r4:b6700100\n[<b04533b8>] (release_nodes) from [<b0454160>] (devres_release_all+0x5c/0x60)\n r8:b1638c54 r7:b117ad94 r6:b1638c10 r5:b117ad94 r4:b163dc10\n[<b0454104>] (devres_release_all) from [<b044e41c>] (__device_release_driver+0x144/0x1ec)\n r5:b117ad94 r4:b163dc10\n[<b044e2d8>] (__device_release_driver) from [<b044f70c>] (device_driver_detach+0x84/0xa0)\n r9:00000000 r8:00000000 r7:b117ad94 r6:b163dc54 r5:b1638c10 r4:b163dc10\n[<b044f688>] (device_driver_detach) from [<b044d274>] (unbind_store+0xe4/0xf8)\n\nInstead, determine the devm allocation state as a flag on the\ncontroller which is guaranteed to be stable during cleanup."
            }
        ]
    },
    "problemtype": {
        "problemtype_data": [
            {
                "description": [
                    {
                        "lang": "eng",
                        "value": "n/a"
                    }
                ]
            }
        ]
    },
    "affects": {
        "vendor": {
            "vendor_data": [
                {
                    "vendor_name": "Linux",
                    "product": {
                        "product_data": [
                            {
                                "product_name": "Linux",
                                "version": {
                                    "version_data": [
                                        {
                                            "version_affected": "<",
                                            "version_name": "a4add022c155",
                                            "version_value": "62bb2c7f2411"
                                        },
                                        {
                                            "version_affected": "<",
                                            "version_name": "0870525cf94b",
                                            "version_value": "8bf96425c90f"
                                        },
                                        {
                                            "version_affected": "<",
                                            "version_name": "8c45a1c6c951",
                                            "version_value": "8e029707f50a"
                                        },
                                        {
                                            "version_affected": "<",
                                            "version_name": "234b432c7b61",
                                            "version_value": "28a5529068c5"
                                        },
                                        {
                                            "version_affected": "<",
                                            "version_name": "3e04a4976add",
                                            "version_value": "001c8e83646a"
                                        },
                                        {
                                            "version_affected": "<",
                                            "version_name": "5e844cc37a5c",
                                            "version_value": "c7fabe372a90"
                                        },
                                        {
                                            "version_value": "not down converted",
                                            "x_cve_json_5_version_data": {
                                                "versions": [
                                                    {
                                                        "version": "5.10",
                                                        "status": "affected"
                                                    },
                                                    {
                                                        "version": "0",
                                                        "lessThan": "5.10",
                                                        "status": "unaffected",
                                                        "versionType": "custom"
                                                    },
                                                    {
                                                        "version": "4.4.271",
                                                        "lessThanOrEqual": "4.4.*",
                                                        "status": "unaffected",
                                                        "versionType": "custom"
                                                    },
                                                    {
                                                        "version": "4.9.271",
                                                        "lessThanOrEqual": "4.9.*",
                                                        "status": "unaffected",
                                                        "versionType": "custom"
                                                    },
                                                    {
                                                        "version": "4.14.233",
                                                        "lessThanOrEqual": "4.14.*",
                                                        "status": "unaffected",
                                                        "versionType": "custom"
                                                    },
                                                    {
                                                        "version": "4.19.191",
                                                        "lessThanOrEqual": "4.19.*",
                                                        "status": "unaffected",
                                                        "versionType": "custom"
                                                    },
                                                    {
                                                        "version": "5.4.119",
                                                        "lessThanOrEqual": "5.4.*",
                                                        "status": "unaffected",
                                                        "versionType": "custom"
                                                    },
                                                    {
                                                        "version": "5.10.37",
                                                        "lessThanOrEqual": "5.10.*",
                                                        "status": "unaffected",
                                                        "versionType": "custom"
                                                    },
                                                    {
                                                        "version": "5.11.21",
                                                        "lessThanOrEqual": "5.11.*",
                                                        "status": "unaffected",
                                                        "versionType": "custom"
                                                    },
                                                    {
                                                        "version": "5.12.4",
                                                        "lessThanOrEqual": "5.12.*",
                                                        "status": "unaffected",
                                                        "versionType": "custom"
                                                    },
                                                    {
                                                        "version": "5.13",
                                                        "lessThanOrEqual": "*",
                                                        "status": "unaffected",
                                                        "versionType": "original_commit_for_fix"
                                                    }
                                                ],
                                                "defaultStatus": "affected"
                                            }
                                        }
                                    ]
                                }
                            }
                        ]
                    }
                }
            ]
        }
    },
    "references": {
        "reference_data": [
            {
                "url": "https://git.kernel.org/stable/c/62bb2c7f2411a0045c24831f11ecacfc35610815",
                "refsource": "MISC",
                "name": "https://git.kernel.org/stable/c/62bb2c7f2411a0045c24831f11ecacfc35610815"
            },
            {
                "url": "https://git.kernel.org/stable/c/8bf96425c90f5c1dcf3b7b9df568019a1d4b8a0e",
                "refsource": "MISC",
                "name": "https://git.kernel.org/stable/c/8bf96425c90f5c1dcf3b7b9df568019a1d4b8a0e"
            },
            {
                "url": "https://git.kernel.org/stable/c/8e029707f50a82c53172359c686b2536ab54e58c",
                "refsource": "MISC",
                "name": "https://git.kernel.org/stable/c/8e029707f50a82c53172359c686b2536ab54e58c"
            },
            {
                "url": "https://git.kernel.org/stable/c/28a5529068c51cdf0295ab1e11a99a3a909a03e4",
                "refsource": "MISC",
                "name": "https://git.kernel.org/stable/c/28a5529068c51cdf0295ab1e11a99a3a909a03e4"
            },
            {
                "url": "https://git.kernel.org/stable/c/001c8e83646ad3b847b18f6ac55a54367d917d74",
                "refsource": "MISC",
                "name": "https://git.kernel.org/stable/c/001c8e83646ad3b847b18f6ac55a54367d917d74"
            },
            {
                "url": "https://git.kernel.org/stable/c/c7fabe372a9031acd00498bc718ce27c253abfd1",
                "refsource": "MISC",
                "name": "https://git.kernel.org/stable/c/c7fabe372a9031acd00498bc718ce27c253abfd1"
            },
            {
                "url": "https://git.kernel.org/stable/c/cee78aa24578edac8cf00513dca618c0acc17cd7",
                "refsource": "MISC",
                "name": "https://git.kernel.org/stable/c/cee78aa24578edac8cf00513dca618c0acc17cd7"
            },
            {
                "url": "https://git.kernel.org/stable/c/8735248ebb918d25427965f0db07939ed0473ec6",
                "refsource": "MISC",
                "name": "https://git.kernel.org/stable/c/8735248ebb918d25427965f0db07939ed0473ec6"
            },
            {
                "url": "https://git.kernel.org/stable/c/794aaf01444d4e765e2b067cba01cc69c1c68ed9",
                "refsource": "MISC",
                "name": "https://git.kernel.org/stable/c/794aaf01444d4e765e2b067cba01cc69c1c68ed9"
            }
        ]
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    "generator": {
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