{"id":"CVE-2023-53474","revision":"dd08272d13a04ad4828eef4107c46f85","records":[{"revision":"dd08272d13a04ad4828eef4107c46f85","observedAt":"2026-10-23T15:48:27.903+00:00","statement":{"source":"cve-program","id":"CVE-2023-53474","aliases":[],"title":"x86/MCE/AMD: Use an u64 for bank_map","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nx86/MCE/AMD: Use an u64 for bank_map\n\nThee maximum number of MCA banks is 64 (MAX_NR_BANKS), see\n\n  a0bc32b3cacf (\"x86/mce: Increase maximum number of banks to 64\").\n\nHowever, the bank_map which contains a bitfield of which banks to\ninitialize is of type unsigned int and that overflows when those bit\nnumbers are >= 32, leading to UBSAN complaining correctly:\n\n  UBSAN: shift-out-of-bounds in arch/x86/kernel/cpu/mce/amd.c:1365:38\n  shift exponent 32 is too large for 32-bit type 'int'\n\nChange the bank_map to a u64 and use the proper BIT_ULL() macro when\nmodifying bits in there.\n\n  [ bp: Rewrite commit message. ]","state":0,"publishedAt":"2025-10-01T11:42:43.798+00:00","modifiedAt":"2026-10-15T21:41:28.463+00:00","affected":[{"ecosystem":"Vendor product","name":"Linux","ranges":[],"versions":[],"rawVersionEvidence":"{\n                    \"product\": \"Linux\",\n                    \"vendor\": \"Linux\",\n                    \"defaultStatus\": \"unaffected\",\n                    \"repo\": \"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\n                    \"programFiles\": [\n                        \"arch/x86/kernel/cpu/mce/amd.c\"\n                    ],\n                    \"versions\": [\n                        {\n                            \"version\": \"a0bc32b3cacf194dc479b342f006203fd1e1941a\",\n                            \"lessThan\": \"a9b9ea0e63a0ec5e97bf1219ab6dcbd55e362f83\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"a0bc32b3cacf194dc479b342f006203fd1e1941a\",\n                            \"lessThan\": \"11c58a0c1937c157dbdf82d5ab634d68c99f3098\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"a0bc32b3cacf194dc479b342f006203fd1e1941a\",\n                            \"lessThan\": \"ba8ffb1251eb629c2ec35220e3896cf4f7b888a7\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"a0bc32b3cacf194dc479b342f006203fd1e1941a\",\n                            \"lessThan\": \"9669fa17287c3af2bbd4868d4c8fdd9e57f8332e\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"a0bc32b3cacf194dc479b342f006203fd1e1941a\",\n                            \"lessThan\": \"67bb7521b6420d81dab7538c0686f18f7d6d09f4\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"a0bc32b3cacf194dc479b342f006203fd1e1941a\",\n                            \"lessThan\": \"4c1cdec319b9aadb65737c3eb1f5cb74bd6aa156\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        }\n                    ]\n                }"},{"ecosystem":"Vendor product","name":"Linux","ranges":[],"versions":[],"rawVersionEvidence":"{\n                    \"product\": \"Linux\",\n                    \"vendor\": \"Linux\",\n                    \"defaultStatus\": \"affected\",\n                    \"repo\": \"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\n                    \"programFiles\": [\n                        \"arch/x86/kernel/cpu/mce/amd.c\"\n                    ],\n                    \"versions\": [\n                        {\n                            \"version\": \"5.10\",\n                            \"status\": \"affected\"\n                        },\n                        {\n                            \"version\": \"0\",\n                            \"lessThan\": \"5.10\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"5.10.180\",\n                            \"lessThanOrEqual\": \"5.10.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"5.15.111\",\n                            \"lessThanOrEqual\": \"5.15.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.1.28\",\n                            \"lessThanOrEqual\": \"6.1.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.2.15\",\n                            \"lessThanOrEqual\": \"6.2.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.3.2\",\n                            \"lessThanOrEqual\": \"6.3.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.4\",\n                            \"lessThanOrEqual\": \"*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"original_commit_for_fix\"\n                        }\n                    ]\n                }"}],"metrics":[{"system":"CVSS 3.1","vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","score":7.8,"severity":"HIGH"}],"references":["https://git.kernel.org/stable/c/a9b9ea0e63a0ec5e97bf1219ab6dcbd55e362f83","https://git.kernel.org/stable/c/11c58a0c1937c157dbdf82d5ab634d68c99f3098","https://git.kernel.org/stable/c/ba8ffb1251eb629c2ec35220e3896cf4f7b888a7","https://git.kernel.org/stable/c/9669fa17287c3af2bbd4868d4c8fdd9e57f8332e","https://git.kernel.org/stable/c/67bb7521b6420d81dab7538c0686f18f7d6d09f4","https://git.kernel.org/stable/c/4c1cdec319b9aadb65737c3eb1f5cb74bd6aa156"],"sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2023-53474","license":"CVE Program Terms of Use","key":"cve-program:CVE-2023-53474","identifiers":["CVE-2023-53474"]},"retained":false,"historicalAffected":[]}],"coverage":[]}