{"cve":"CVE-2025-23134","nvd":{"published":"2025-04-16T15:16:07.797","modified":"2026-06-17T08:52:12.260","status":"Modified","description":"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.","cvss_v4":null,"cvss_v3":{"version":"3.1","vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H","score":5.5},"cwes":["CWE-667"],"references":["https://git.kernel.org/stable/c/15291b561d8cc835a2eea76b394070cf8e072771","https://git.kernel.org/stable/c/296f7a9e15aab276db11206cbc1e2ae1215d7862","https://git.kernel.org/stable/c/3424c8f53bc63c87712a7fc22dc13d0cc85fb0d6","https://git.kernel.org/stable/c/b074f47e55df93832bbbca1b524c501e6fea1c0d"],"products":["linux:linux_kernel"],"source":"nvd","synced_at":"2026-10-19T22:01:11.054312287+00:00"},"epss":{"cve":"CVE-2025-23134","score":0.00148,"percentile":0.03949,"date":"2026-10-31"},"kev":null,"osv":[],"attribution":["This product uses the NVD API but is not endorsed or certified by the NVD.","EPSS scores: FIRST Exploit Prediction Scoring System, https://www.first.org/epss","Known exploited vulnerabilities: CISA Known Exploited Vulnerabilities Catalog, https://www.cisa.gov/known-exploited-vulnerabilities-catalog","Package advisories: OSV (https://osv.dev), from the GitHub Advisory Database, PyPA, Go, RustSec and other ecosystem databases, under CC-BY 4.0 or CC0","CVE records: the CVE Program's CVE List (https://www.cve.org), under its terms of use (https://www.cve.org/Legal/TermsOfUse). CVE is a registered trademark of The MITRE Corporation; this product is not affiliated with the CVE Program."]}