{
    "data_version": "4.0",
    "data_type": "CVE",
    "data_format": "MITRE",
    "CVE_data_meta": {
        "ID": "CVE-2021-47483",
        "ASSIGNER": "cve@kernel.org",
        "STATE": "PUBLIC"
    },
    "description": {
        "description_data": [
            {
                "lang": "eng",
                "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nregmap: Fix possible double-free in regcache_rbtree_exit()\n\nIn regcache_rbtree_insert_to_block(), when 'present' realloc failed,\nthe 'blk' which is supposed to assign to 'rbnode->block' will be freed,\nso 'rbnode->block' points a freed memory, in the error handling path of\nregcache_rbtree_init(), 'rbnode->block' will be freed again in\nregcache_rbtree_exit(), KASAN will report double-free as follows:\n\nBUG: KASAN: double-free or invalid-free in kfree+0xce/0x390\nCall Trace:\n slab_free_freelist_hook+0x10d/0x240\n kfree+0xce/0x390\n regcache_rbtree_exit+0x15d/0x1a0\n regcache_rbtree_init+0x224/0x2c0\n regcache_init+0x88d/0x1310\n __regmap_init+0x3151/0x4a80\n __devm_regmap_init+0x7d/0x100\n madera_spi_probe+0x10f/0x333 [madera_spi]\n spi_probe+0x183/0x210\n really_probe+0x285/0xc30\n\nTo fix this, moving up the assignment of rbnode->block to immediately after\nthe reallocation has succeeded so that the data structure stays valid even\nif the second reallocation fails."
            }
        ]
    },
    "problemtype": {
        "problemtype_data": [
            {
                "description": [
                    {
                        "lang": "eng",
                        "value": "n/a"
                    }
                ]
            }
        ]
    },
    "affects": {
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            "vendor_data": [
                {
                    "vendor_name": "Linux",
                    "product": {
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                            {
                                "product_name": "Linux",
                                "version": {
                                    "version_data": [
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                                            "version_affected": "<",
                                            "version_name": "3f4ff561bc88",
                                            "version_value": "e72dce9afbdb"
                                        },
                                        {
                                            "version_value": "not down converted",
                                            "x_cve_json_5_version_data": {
                                                "versions": [
                                                    {
                                                        "version": "3.12",
                                                        "status": "affected"
                                                    },
                                                    {
                                                        "version": "0",
                                                        "lessThan": "3.12",
                                                        "status": "unaffected",
                                                        "versionType": "semver"
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                                                    {
                                                        "version": "4.4.291",
                                                        "lessThanOrEqual": "4.4.*",
                                                        "status": "unaffected",
                                                        "versionType": "semver"
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                                                        "version": "4.9.289",
                                                        "lessThanOrEqual": "4.9.*",
                                                        "status": "unaffected",
                                                        "versionType": "semver"
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                                                        "version": "4.14.254",
                                                        "lessThanOrEqual": "4.14.*",
                                                        "status": "unaffected",
                                                        "versionType": "semver"
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                                                    {
                                                        "version": "4.19.215",
                                                        "lessThanOrEqual": "4.19.*",
                                                        "status": "unaffected",
                                                        "versionType": "semver"
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                                                    {
                                                        "version": "5.4.157",
                                                        "lessThanOrEqual": "5.4.*",
                                                        "status": "unaffected",
                                                        "versionType": "semver"
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                                                    {
                                                        "version": "5.10.77",
                                                        "lessThanOrEqual": "5.10.*",
                                                        "status": "unaffected",
                                                        "versionType": "semver"
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                                                        "version": "5.14.16",
                                                        "lessThanOrEqual": "5.14.*",
                                                        "status": "unaffected",
                                                        "versionType": "semver"
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                                                    {
                                                        "version": "5.15",
                                                        "lessThanOrEqual": "*",
                                                        "status": "unaffected",
                                                        "versionType": "original_commit_for_fix"
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        "reference_data": [
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                "url": "https://git.kernel.org/stable/c/e72dce9afbdbfa70d9b44f5908a50ff6c4858999",
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                "name": "https://git.kernel.org/stable/c/e72dce9afbdbfa70d9b44f5908a50ff6c4858999"
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                "name": "https://git.kernel.org/stable/c/fc081477b47dfc3a6cb50a96087fc29674013fc2"
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                "name": "https://git.kernel.org/stable/c/3dae1a4eced3ee733d7222e69b8a55caf2d61091"
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                "name": "https://git.kernel.org/stable/c/1cead23c1c0bc766dacb900a3b0269f651ad596f"
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