{"id":"CVE-2023-53484","summary":"lib: cpu_rmap: Avoid use after free on rmap-\u003eobj array entries","details":"In the Linux kernel, the following vulnerability has been resolved:\n\nlib: cpu_rmap: Avoid use after free on rmap-\u003eobj array entries\n\nWhen calling irq_set_affinity_notifier() with NULL at the notify\nargument, it will cause freeing of the glue pointer in the\ncorresponding array entry but will leave the pointer in the array. A\nsubsequent call to free_irq_cpu_rmap() will try to free this entry again\nleading to possible use after free.\n\nFix that by setting NULL to the array entry and checking that we have\nnon-zero at the array entry when iterating over the array in\nfree_irq_cpu_rmap().\n\nThe current code does not suffer from this since there are no cases\nwhere irq_set_affinity_notifier(irq, NULL) (note the NULL passed for the\nnotify arg) is called, followed by a call to free_irq_cpu_rmap() so we\ndon't hit and issue. Subsequent patches in this series excersize this\nflow, hence the required fix.","modified":"2026-05-28T03:53:47.089118220Z","published":"2025-10-01T11:42:52.590Z","related":["SUSE-SU-2025:4189-1"],"database_specific":{"cna_assigner":"Linux","osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2023/53xxx/CVE-2023-53484.json"},"references":[{"type":"WEB","url":"https://git.kernel.org/stable/c/4e0473f1060aa49621d40a113afde24818101d37"},{"type":"WEB","url":"https://git.kernel.org/stable/c/67bca5f1d644f4e79b694abd8052a177de81c37f"},{"type":"WEB","url":"https://git.kernel.org/stable/c/981f339d2905b6a92ef59358158b326493aecac5"},{"type":"WEB","url":"https://git.kernel.org/stable/c/c6ed54dd90698dc0744d669524cc1c122ded8a16"},{"type":"WEB","url":"https://git.kernel.org/stable/c/c9115f49cf260d24d8b5f2d9a4b63cb31a627bb4"},{"type":"WEB","url":"https://git.kernel.org/stable/c/cc2d2b3dbfb0ba57bc027fb7e1121250c50e4000"},{"type":"WEB","url":"https://git.kernel.org/stable/c/d1308bd0b24cb1d78fa2747d5fa3e055cc628a48"},{"type":"WEB","url":"https://git.kernel.org/stable/c/f748e15253833b771acbede14ea98f50831ac289"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2023/53xxx/CVE-2023-53484.json"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2023-53484"},{"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":"896f97ea95c1d29c0520ee0766b66b7f64cb967c"},{"fixed":"981f339d2905b6a92ef59358158b326493aecac5"},{"fixed":"d1308bd0b24cb1d78fa2747d5fa3e055cc628a48"},{"fixed":"cc2d2b3dbfb0ba57bc027fb7e1121250c50e4000"},{"fixed":"f748e15253833b771acbede14ea98f50831ac289"},{"fixed":"c6ed54dd90698dc0744d669524cc1c122ded8a16"},{"fixed":"c9115f49cf260d24d8b5f2d9a4b63cb31a627bb4"},{"fixed":"67bca5f1d644f4e79b694abd8052a177de81c37f"},{"fixed":"4e0473f1060aa49621d40a113afde24818101d37"}]}],"database_specific":{"source":"https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2023-53484.json"}},{"package":{"name":"Kernel","ecosystem":"Linux"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"3.8.0"},{"fixed":"4.14.316"}]},{"type":"ECOSYSTEM","events":[{"introduced":"4.15.0"},{"fixed":"4.19.284"}]},{"type":"ECOSYSTEM","events":[{"introduced":"4.20.0"},{"fixed":"5.4.244"}]},{"type":"ECOSYSTEM","events":[{"introduced":"5.5.0"},{"fixed":"5.10.181"}]},{"type":"ECOSYSTEM","events":[{"introduced":"5.11.0"},{"fixed":"5.15.113"}]},{"type":"ECOSYSTEM","events":[{"introduced":"5.16.0"},{"fixed":"6.1.30"}]},{"type":"ECOSYSTEM","events":[{"introduced":"6.2.0"},{"fixed":"6.3.4"}]}],"database_specific":{"source":"https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2023-53484.json"}}],"schema_version":"1.7.5"}