{"id":"CVE-2025-37880","summary":"um: work around sched_yield not yielding in time-travel mode","details":"In the Linux kernel, the following vulnerability has been resolved:\n\num: work around sched_yield not yielding in time-travel mode\n\nsched_yield by a userspace may not actually cause scheduling in\ntime-travel mode as no time has passed. In the case seen it appears to\nbe a badly implemented userspace spinlock in ASAN. Unfortunately, with\ntime-travel it causes an extreme slowdown or even deadlock depending on\nthe kernel configuration (CONFIG_UML_MAX_USERSPACE_ITERATIONS).\n\nWork around it by accounting time to the process whenever it executes a\nsched_yield syscall.","modified":"2026-04-02T12:47:36.046Z","published":"2025-05-09T06:45:44.117Z","related":["CGA-88g3-fw2v-72f9"],"database_specific":{"osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2025/37xxx/CVE-2025-37880.json","cna_assigner":"Linux"},"references":[{"type":"WEB","url":"https://git.kernel.org/stable/c/887c5c12e80c8424bd471122d2e8b6b462e12874"},{"type":"WEB","url":"https://git.kernel.org/stable/c/990ddc65173776f1e01e7135d8c1fd5f8fd4d5d2"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2025/37xxx/CVE-2025-37880.json"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2025-37880"},{"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":"065038706f77a56754e8f0c2556dab7e22dfe577"},{"fixed":"990ddc65173776f1e01e7135d8c1fd5f8fd4d5d2"},{"fixed":"887c5c12e80c8424bd471122d2e8b6b462e12874"}]}],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2025-37880.json"}}],"schema_version":"1.7.5"}