{"id":"CVE-2023-53205","summary":"KVM: s390/diag: fix racy access of physical cpu number in diag 9c handler","details":"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.","modified":"2026-03-20T12:33:01.566708Z","published":"2025-09-15T14:21:33.560Z","related":["SUSE-SU-2025:03600-1","SUSE-SU-2025:03615-1","SUSE-SU-2025:03628-1","SUSE-SU-2025:03634-1","SUSE-SU-2025:20851-1","SUSE-SU-2025:20861-1","SUSE-SU-2025:20870-1","SUSE-SU-2025:20898-1","SUSE-SU-2025:3716-1","SUSE-SU-2025:3751-1","SUSE-SU-2025:3761-1","SUSE-SU-2025:4057-1","SUSE-SU-2025:4132-1","SUSE-SU-2025:4141-1"],"database_specific":{"osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2023/53xxx/CVE-2023-53205.json","cna_assigner":"Linux"},"references":[{"type":"WEB","url":"https://git.kernel.org/stable/c/0bc380beb78aa352eadbc21d934dd9606fcee808"},{"type":"WEB","url":"https://git.kernel.org/stable/c/86bfb18bad60fc468e5f112cbbd918462a8dd435"},{"type":"WEB","url":"https://git.kernel.org/stable/c/a9ccf140a2a03a0ae82be4bdfbdd17bdaea72ff5"},{"type":"WEB","url":"https://git.kernel.org/stable/c/dc7e0192c470a53d847c79a2796f9ac429477a26"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2023/53xxx/CVE-2023-53205.json"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2023-53205"},{"type":"PACKAGE","url":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","events":[{"introduced":"87e28a15c42cc592009c32a8c20e5789059027c2"},{"fixed":"a9ccf140a2a03a0ae82be4bdfbdd17bdaea72ff5"},{"fixed":"86bfb18bad60fc468e5f112cbbd918462a8dd435"},{"fixed":"dc7e0192c470a53d847c79a2796f9ac429477a26"},{"fixed":"0bc380beb78aa352eadbc21d934dd9606fcee808"}]}],"database_specific":{"source":"https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2023-53205.json"}}],"schema_version":"1.7.5"}