{
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    "data_type": "CVE",
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    "CVE_data_meta": {
        "ID": "CVE-2023-52504",
        "ASSIGNER": "cve@kernel.org",
        "STATE": "PUBLIC"
    },
    "description": {
        "description_data": [
            {
                "lang": "eng",
                "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nx86/alternatives: Disable KASAN in apply_alternatives()\n\nFei has reported that KASAN triggers during apply_alternatives() on\na 5-level paging machine:\n\n\tBUG: KASAN: out-of-bounds in rcu_is_watching()\n\tRead of size 4 at addr ff110003ee6419a0 by task swapper/0/0\n\t...\n\t__asan_load4()\n\trcu_is_watching()\n\ttrace_hardirqs_on()\n\ttext_poke_early()\n\tapply_alternatives()\n\t...\n\nOn machines with 5-level paging, cpu_feature_enabled(X86_FEATURE_LA57)\ngets patched. It includes KASAN code, where KASAN_SHADOW_START depends on\n__VIRTUAL_MASK_SHIFT, which is defined with cpu_feature_enabled().\n\nKASAN gets confused when apply_alternatives() patches the\nKASAN_SHADOW_START users. A test patch that makes KASAN_SHADOW_START\nstatic, by replacing __VIRTUAL_MASK_SHIFT with 56, works around the issue.\n\nFix it for real by disabling KASAN while the kernel is patching alternatives.\n\n[ mingo: updated the changelog ]"
            }
        ]
    },
    "problemtype": {
        "problemtype_data": [
            {
                "description": [
                    {
                        "lang": "eng",
                        "value": "n/a"
                    }
                ]
            }
        ]
    },
    "affects": {
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                    "vendor_name": "Linux",
                    "product": {
                        "product_data": [
                            {
                                "product_name": "Linux",
                                "version": {
                                    "version_data": [
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                                            "version_affected": "<",
                                            "version_name": "6657fca06e3f",
                                            "version_value": "3719d3c36aa8"
                                        },
                                        {
                                            "version_value": "not down converted",
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                                                "versions": [
                                                    {
                                                        "version": "4.17",
                                                        "status": "affected"
                                                    },
                                                    {
                                                        "version": "0",
                                                        "lessThan": "4.17",
                                                        "status": "unaffected",
                                                        "versionType": "custom"
                                                    },
                                                    {
                                                        "version": "4.19.297",
                                                        "lessThanOrEqual": "4.19.*",
                                                        "status": "unaffected",
                                                        "versionType": "custom"
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                                                    {
                                                        "version": "5.4.270",
                                                        "lessThanOrEqual": "5.4.*",
                                                        "status": "unaffected",
                                                        "versionType": "custom"
                                                    },
                                                    {
                                                        "version": "5.10.199",
                                                        "lessThanOrEqual": "5.10.*",
                                                        "status": "unaffected",
                                                        "versionType": "custom"
                                                    },
                                                    {
                                                        "version": "5.15.136",
                                                        "lessThanOrEqual": "5.15.*",
                                                        "status": "unaffected",
                                                        "versionType": "custom"
                                                    },
                                                    {
                                                        "version": "6.1.59",
                                                        "lessThanOrEqual": "6.1.*",
                                                        "status": "unaffected",
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                                                        "lessThanOrEqual": "6.5.*",
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        "reference_data": [
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                "url": "https://git.kernel.org/stable/c/3719d3c36aa853d5a2401af9f8d6b116c91ad5ae",
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                "name": "https://git.kernel.org/stable/c/3719d3c36aa853d5a2401af9f8d6b116c91ad5ae"
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