{"id":"CVE-2025-23134","summary":"ALSA: timer: Don't take register_mutex with copy_from/to_user()","details":"In the Linux kernel, the following vulnerability has been resolved:\n\nALSA: timer: Don't take register_mutex with copy_from/to_user()\n\nThe infamous mmap_lock taken in copy_from/to_user() can be often\nproblematic when it's called inside another mutex, as they might lead\nto deadlocks.\n\nIn the case of ALSA timer code, the bad pattern is with\nguard(mutex)(&register_mutex) that covers copy_from/to_user() -- which\nwas mistakenly introduced at converting to guard(), and it had been\ncarefully worked around in the past.\n\nThis patch fixes those pieces simply by moving copy_from/to_user() out\nof the register mutex lock again.","modified":"2026-03-20T12:41:21.789529Z","published":"2025-04-16T14:13:15.144Z","related":["SUSE-SU-2025:01951-1","SUSE-SU-2025:01967-1","SUSE-SU-2025:01972-1"],"database_specific":{"osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2025/23xxx/CVE-2025-23134.json","cna_assigner":"Linux"},"references":[{"type":"WEB","url":"https://git.kernel.org/stable/c/15291b561d8cc835a2eea76b394070cf8e072771"},{"type":"WEB","url":"https://git.kernel.org/stable/c/296f7a9e15aab276db11206cbc1e2ae1215d7862"},{"type":"WEB","url":"https://git.kernel.org/stable/c/3424c8f53bc63c87712a7fc22dc13d0cc85fb0d6"},{"type":"WEB","url":"https://git.kernel.org/stable/c/b074f47e55df93832bbbca1b524c501e6fea1c0d"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2025/23xxx/CVE-2025-23134.json"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2025-23134"},{"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":"3923de04c81733b30b8ed667569632272fdfed9a"},{"fixed":"15291b561d8cc835a2eea76b394070cf8e072771"},{"fixed":"296f7a9e15aab276db11206cbc1e2ae1215d7862"},{"fixed":"b074f47e55df93832bbbca1b524c501e6fea1c0d"},{"fixed":"3424c8f53bc63c87712a7fc22dc13d0cc85fb0d6"}]}],"database_specific":{"source":"https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2025-23134.json"}}],"schema_version":"1.7.5","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H"}]}