{"id":"CVE-2023-53205","revision":"9247efd567b041039985d08d4098147b","records":[{"revision":"9247efd567b041039985d08d4098147b","observedAt":"2026-10-23T15:48:27.903+00:00","statement":{"source":"cve-program","id":"CVE-2023-53205","aliases":[],"title":"KVM: s390/diag: fix racy access of physical cpu number in diag 9c handler","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nKVM: s390/diag: fix racy access of physical cpu number in diag 9c handler\n\nWe do check for target CPU == -1, but this might change at the time we\nare going to use it. Hold the physical target CPU in a local variable to\navoid out-of-bound accesses to the cpu arrays.","state":0,"publishedAt":"2025-09-15T14:21:33.56+00:00","modifiedAt":"2026-10-15T21:41:27.937+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/s390/kvm/diag.c\"\n                    ],\n                    \"versions\": [\n                        {\n                            \"version\": \"87e28a15c42cc592009c32a8c20e5789059027c2\",\n                            \"lessThan\": \"a9ccf140a2a03a0ae82be4bdfbdd17bdaea72ff5\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"87e28a15c42cc592009c32a8c20e5789059027c2\",\n                            \"lessThan\": \"86bfb18bad60fc468e5f112cbbd918462a8dd435\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"87e28a15c42cc592009c32a8c20e5789059027c2\",\n                            \"lessThan\": \"dc7e0192c470a53d847c79a2796f9ac429477a26\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"87e28a15c42cc592009c32a8c20e5789059027c2\",\n                            \"lessThan\": \"0bc380beb78aa352eadbc21d934dd9606fcee808\",\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/s390/kvm/diag.c\"\n                    ],\n                    \"versions\": [\n                        {\n                            \"version\": \"5.13\",\n                            \"status\": \"affected\"\n                        },\n                        {\n                            \"version\": \"0\",\n                            \"lessThan\": \"5.13\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"5.15.121\",\n                            \"lessThanOrEqual\": \"5.15.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.1.39\",\n                            \"lessThanOrEqual\": \"6.1.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.4.4\",\n                            \"lessThanOrEqual\": \"6.4.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.5\",\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:C/C:L/I:N/A:H","score":7.3,"severity":"HIGH"}],"references":["https://git.kernel.org/stable/c/a9ccf140a2a03a0ae82be4bdfbdd17bdaea72ff5","https://git.kernel.org/stable/c/86bfb18bad60fc468e5f112cbbd918462a8dd435","https://git.kernel.org/stable/c/dc7e0192c470a53d847c79a2796f9ac429477a26","https://git.kernel.org/stable/c/0bc380beb78aa352eadbc21d934dd9606fcee808"],"sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2023-53205","license":"CVE Program Terms of Use","key":"cve-program:CVE-2023-53205","identifiers":["CVE-2023-53205"]},"retained":false,"historicalAffected":[]}],"coverage":[]}