{"id":"CVE-2023-52445","summary":"media: pvrusb2: fix use after free on context disconnection","details":"In the Linux kernel, the following vulnerability has been resolved:\n\nmedia: pvrusb2: fix use after free on context disconnection\n\nUpon module load, a kthread is created targeting the\npvr2_context_thread_func function, which may call pvr2_context_destroy\nand thus call kfree() on the context object. However, that might happen\nbefore the usb hub_event handler is able to notify the driver. This\npatch adds a sanity check before the invalid read reported by syzbot,\nwithin the context disconnection call stack.","modified":"2026-03-20T12:32:28.417044Z","published":"2024-02-22T16:21:37.784Z","related":["ALSA-2024:3618","ALSA-2024:3627","SUSE-SU-2024:0855-1","SUSE-SU-2024:0856-1","SUSE-SU-2024:0857-1","SUSE-SU-2024:0858-1","SUSE-SU-2024:0900-1","SUSE-SU-2024:0900-2","SUSE-SU-2024:0910-1","SUSE-SU-2024:0925-1","SUSE-SU-2024:0926-1","SUSE-SU-2024:0975-1","SUSE-SU-2024:0976-1","SUSE-SU-2024:0977-1","SUSE-SU-2024:1669-1","USN-6818-2","USN-6819-2"],"database_specific":{"cna_assigner":"Linux","osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2023/52xxx/CVE-2023-52445.json"},"references":[{"type":"WEB","url":"https://git.kernel.org/stable/c/2cf0005d315549b8d2b940ff96a66c2a889aa795"},{"type":"WEB","url":"https://git.kernel.org/stable/c/30773ea47d41773f9611ffb4ebc9bda9d19a9e7e"},{"type":"WEB","url":"https://git.kernel.org/stable/c/3233d8bf7893550045682192cb227af7fa3defeb"},{"type":"WEB","url":"https://git.kernel.org/stable/c/437b5f57732bb4cc32cc9f8895d2010ee9ff521c"},{"type":"WEB","url":"https://git.kernel.org/stable/c/47aa8fcd5e8b5563af4042a00f25ba89bef8f33d"},{"type":"WEB","url":"https://git.kernel.org/stable/c/ded85b0c0edd8f45fec88783d7555a5b982449c1"},{"type":"WEB","url":"https://git.kernel.org/stable/c/ec3634ebe23fc3c44ebc67c6d25917300bc68c08"},{"type":"WEB","url":"https://git.kernel.org/stable/c/ec36c134dd020d28e312c2f1766f85525e747aab"},{"type":"WEB","url":"https://lists.debian.org/debian-lts-announce/2024/06/msg00016.html"},{"type":"WEB","url":"https://lists.debian.org/debian-lts-announce/2024/06/msg00020.html"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2023/52xxx/CVE-2023-52445.json"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2023-52445"},{"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":"e5be15c63804e05b5a94197524023702a259e308"},{"fixed":"ec36c134dd020d28e312c2f1766f85525e747aab"},{"fixed":"47aa8fcd5e8b5563af4042a00f25ba89bef8f33d"},{"fixed":"3233d8bf7893550045682192cb227af7fa3defeb"},{"fixed":"ec3634ebe23fc3c44ebc67c6d25917300bc68c08"},{"fixed":"30773ea47d41773f9611ffb4ebc9bda9d19a9e7e"},{"fixed":"2cf0005d315549b8d2b940ff96a66c2a889aa795"},{"fixed":"437b5f57732bb4cc32cc9f8895d2010ee9ff521c"},{"fixed":"ded85b0c0edd8f45fec88783d7555a5b982449c1"}]}],"database_specific":{"source":"https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2023-52445.json"}}],"schema_version":"1.7.5"}