{
    "data_version": "4.0",
    "data_type": "CVE",
    "data_format": "MITRE",
    "CVE_data_meta": {
        "ID": "CVE-2023-52659",
        "ASSIGNER": "cve@kernel.org",
        "STATE": "PUBLIC"
    },
    "description": {
        "description_data": [
            {
                "lang": "eng",
                "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nx86/mm: Ensure input to pfn_to_kaddr() is treated as a 64-bit type\n\nOn 64-bit platforms, the pfn_to_kaddr() macro requires that the input\nvalue is 64 bits in order to ensure that valid address bits don't get\nlost when shifting that input by PAGE_SHIFT to calculate the physical\naddress to provide a virtual address for.\n\nOne such example is in pvalidate_pages() (used by SEV-SNP guests), where\nthe GFN in the struct used for page-state change requests is a 40-bit\nbit-field, so attempts to pass this GFN field directly into\npfn_to_kaddr() ends up causing guest crashes when dealing with addresses\nabove the 1TB range due to the above.\n\nFix this issue with SEV-SNP guests, as well as any similar cases that\nmight cause issues in current/future code, by using an inline function,\ninstead of a macro, so that the input is implicitly cast to the\nexpected 64-bit input type prior to performing the shift operation.\n\nWhile it might be argued that the issue is on the caller side, other\narchs/macros have taken similar approaches to deal with instances like\nthis, such as ARM explicitly casting the input to phys_addr_t:\n\n  e48866647b48 (\"ARM: 8396/1: use phys_addr_t in pfn_to_kaddr()\")\n\nA C inline function is even better though.\n\n[ mingo: Refined the changelog some more & added __always_inline. ]"
            }
        ]
    },
    "problemtype": {
        "problemtype_data": [
            {
                "description": [
                    {
                        "lang": "eng",
                        "value": "n/a"
                    }
                ]
            }
        ]
    },
    "affects": {
        "vendor": {
            "vendor_data": [
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                    "vendor_name": "Linux",
                    "product": {
                        "product_data": [
                            {
                                "product_name": "Linux",
                                "version": {
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                                            "version_affected": "<",
                                            "version_name": "6c3211796326",
                                            "version_value": "325956b0173f"
                                        },
                                        {
                                            "version_value": "not down converted",
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                                                "versions": [
                                                    {
                                                        "version": "6.5",
                                                        "status": "affected"
                                                    },
                                                    {
                                                        "version": "0",
                                                        "lessThan": "6.5",
                                                        "status": "unaffected",
                                                        "versionType": "custom"
                                                    },
                                                    {
                                                        "version": "6.6.23",
                                                        "lessThanOrEqual": "6.6.*",
                                                        "status": "unaffected",
                                                        "versionType": "custom"
                                                    },
                                                    {
                                                        "version": "6.7.11",
                                                        "lessThanOrEqual": "6.7.*",
                                                        "status": "unaffected",
                                                        "versionType": "custom"
                                                    },
                                                    {
                                                        "version": "6.8.2",
                                                        "lessThanOrEqual": "6.8.*",
                                                        "status": "unaffected",
                                                        "versionType": "custom"
                                                    },
                                                    {
                                                        "version": "6.9",
                                                        "lessThanOrEqual": "*",
                                                        "status": "unaffected",
                                                        "versionType": "original_commit_for_fix"
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                                                "defaultStatus": "affected"
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                "name": "https://git.kernel.org/stable/c/7e1471888a5e6e846e9b4d306e5327db2b58e64e"
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                "url": "https://git.kernel.org/stable/c/814305b5c23cb815ada68d43019f39050472b25f",
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                "name": "https://git.kernel.org/stable/c/814305b5c23cb815ada68d43019f39050472b25f"
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