{"id":"CVE-2023-52864","summary":"platform/x86: wmi: Fix opening of char device","details":"In the Linux kernel, the following vulnerability has been resolved:\n\nplatform/x86: wmi: Fix opening of char device\n\nSince commit fa1f68db6ca7 (\"drivers: misc: pass miscdevice pointer via\nfile private data\"), the miscdevice stores a pointer to itself inside\nfilp-\u003eprivate_data, which means that private_data will not be NULL when\nwmi_char_open() is called. This might cause memory corruption should\nwmi_char_open() be unable to find its driver, something which can\nhappen when the associated WMI device is deleted in wmi_free_devices().\n\nFix the problem by using the miscdevice pointer to retrieve the WMI\ndevice data associated with a char device using container_of(). This\nalso avoids wmi_char_open() picking a wrong WMI device bound to a\ndriver with the same name as the original driver.","modified":"2026-04-02T09:43:25.978210Z","published":"2024-05-21T15:31:55.875Z","related":["ALSA-2024:5101","ALSA-2024:5102","ALSA-2024:5363","SUSE-SU-2024:1979-1","SUSE-SU-2024:1983-1","SUSE-SU-2024:2008-1","SUSE-SU-2024:2011-1","SUSE-SU-2024:2019-1","SUSE-SU-2024:2184-1","SUSE-SU-2024:2189-1","SUSE-SU-2024:2190-1","SUSE-SU-2024:2571-1","SUSE-SU-2024:2896-1","SUSE-SU-2024:2973-1","SUSE-SU-2025:20008-1","SUSE-SU-2025:20028-1"],"database_specific":{"osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2023/52xxx/CVE-2023-52864.json","cna_assigner":"Linux"},"references":[{"type":"WEB","url":"https://git.kernel.org/stable/c/36d85fa7ae0d6be651c1a745191fa7ef055db43e"},{"type":"WEB","url":"https://git.kernel.org/stable/c/44a96796d25809502c75771d40ee693c2e44724e"},{"type":"WEB","url":"https://git.kernel.org/stable/c/9fb0eed09e1470cd4021ff52b2b9dfcbcee4c203"},{"type":"WEB","url":"https://git.kernel.org/stable/c/cf098e937dd125c0317a0d6f261ac2a950a233d6"},{"type":"WEB","url":"https://git.kernel.org/stable/c/d426a2955e45a95b2282764105fcfb110a540453"},{"type":"WEB","url":"https://git.kernel.org/stable/c/e0bf076b734a2fab92d8fddc2b8b03462eee7097"},{"type":"WEB","url":"https://git.kernel.org/stable/c/eba9ac7abab91c8f6d351460239108bef5e7a0b6"},{"type":"WEB","url":"https://git.kernel.org/stable/c/fb7b06b59c6887659c6ed0ecd3110835eecbb6a3"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2023/52xxx/CVE-2023-52864.json"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2023-52864"},{"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":"44b6b7661132b1b0e5fd3147ded66f1e4a817ca9"},{"fixed":"cf098e937dd125c0317a0d6f261ac2a950a233d6"},{"fixed":"9fb0eed09e1470cd4021ff52b2b9dfcbcee4c203"},{"fixed":"d426a2955e45a95b2282764105fcfb110a540453"},{"fixed":"e0bf076b734a2fab92d8fddc2b8b03462eee7097"},{"fixed":"44a96796d25809502c75771d40ee693c2e44724e"},{"fixed":"36d85fa7ae0d6be651c1a745191fa7ef055db43e"},{"fixed":"fb7b06b59c6887659c6ed0ecd3110835eecbb6a3"},{"fixed":"eba9ac7abab91c8f6d351460239108bef5e7a0b6"}]}],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2023-52864.json"}}],"schema_version":"1.7.5"}